stevee

Battery Charger Circuits

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https://stevepedwards.today/electronicsarea.com/12v-auto-turn-off-battery-charger-with-current-limiter/    

1KHz Sine Wave Gen Circuits, MCL Wien with Tweeter

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From the above, I built this: and turned my MCL gen into a 880Hz gen using a Realistic 8ohm tweeter in place of the bulb with the 0.1uF caps replaced: Cx must be ceramic for 8kHz +   The above cannot work surely, as the gain is less than 3? 3k/1.8 < 3..

Su600 – No Bass Knob

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No Bass knob! That's it! Ebay "untested" not "spare repair" Found an Su840 knob replacement for balance, close enough. The power out is 53Vpp = 26.5Vp = 18.74V RMS = 351 / 8 ohms = 44W per channel into 8 ohms. This is with a massive 7Vp tuner input from the Carlson 1kHz Oscillator though, ... Su600 – No Bass Knob

Sweep Signal Generator AD9833 on Uno

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https://www.instructables.com/id/Signal-Generator-AD9833/ //----------------------------------------------------------------------------- // Copyright 2018 Peter Balch // subject to the GNU General Public License //----------------------------------------------------------------------------- #include <math.h> //----------------------------------------------------------------------------- // Global Constants //----------------------------------------------------------------------------- const long BAUDRATE = 115200; // Baud rate of UART in bps //----------------------------------------------------------------------------- // Global Variables //----------------------------------------------------------------------------- const byte numberOfDigits = 6; // number of digits in the frequense byte freqSGLo[numberOfDigits] = ... Sweep Signal Generator AD9833 on Uno

Sean’s Ibanez Chorus

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Has 18V power but no FX sound, but signal passes to output. Duh! The mono out is clean sig only!! The stereo out is clean + FX! Not stereo FX..hence seemingly no FX when in mono out... This has 2 clock chips (MN3101/3007) for Bucket Brigade Devices. MN3101.pdf tl022.pdf ua741.pdf Not the right circuit, but ... Sean’s Ibanez Chorus

Sean’s DOD Env Filter

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Bad connections/short to power line. LED dis. Seems ok now. Need a sweep gen to check properly on bench...Seems to filter up to 5kHz max? Shit sound - the Autowah3 is much better. MC14007UB-D.pdf LM13600.pdf lm1458.pdf

Technics SU V303 + THD

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One of the nicest looking 1983 amps in silver and black eh? Liked to have kept this... Nothing wrong really, bit noisy - caps etc. Subsonic buttons makes loud pop - cleaned pots/switches etc. Has a micro controlled preheat function: 54Vpp = 27Vp =-  19V RMS P = V^2/ R = 19 x 19 / ... Technics SU V303 + THD

Sean’s SU A808

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70W monster (235W used). Nothing actually wrong, dirty inputs? Sean plugging amp vol out into phono no doubt... 22,000uF Caps!! Some odd small signals on the RIAA outs compared to 3+ bigger amp in, but still works on all inputs. +/-50V DC rails Power out x10 probes = 70Vpp. RMS = 24.748737342 612.5-  / 8 ... Sean’s SU A808

Technics SUX911 – Fixed, Power Out

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Lost track of definitive faults (lost channel, low volume) fixes - it's had the 3120A power amp from the 84o installed, the M5219 tone/buffer amps replaced by LM328s and after removal of AN6554 phase amp and damaging tracks, I managed to install a 7 pin chip holder here, then got full signal in/out all 4 ... Technics SUX911 – Fixed, Power Out

LM324/AN6554 14pin quad amp tester

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These are used in the Su x911 for phase effects surround sound etc. I had LOADS of shit NOT getting these to amplify as an amp before doing this circuit - I can only assume bad board connections as the same IC oscillates fine for this! Another wasted day... Taken from this first output for ... LM324/AN6554 14pin quad amp tester

Vacuum Flouro Displays

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These ARE vacuum tubes! They have a grid, anode and cathode same as a tube. See error in assuming getter was blown bulb in prior Technics 840? post!! Goon..They can't be used as amps though... The pins can usually be traced from the back. The pins between the dots are the grid and the dots ... Vacuum Flouro Displays

Indie IT 150 Guitar Amp

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Bad Link Cable Connections - soldered them direct to valve PCB pins - and Missing Tube Heater link cable. Probe slip arc'd heater feed caps - blew mains LED cct. Used valve LED. Lost speaker output. MP3 and 1 channel for guitar in works via phones. Tube heaters now working so have pre amp: Some ... Indie IT 150 Guitar Amp

LM358 Dual Op Amp Tester

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LM358 - Same pins as: TL092 6558/6552 M5219 This is the modified version of the LM 741 Op Amp tester in the older Post: https://stevepedwards.today/circuitdigest.com/electronic-circuits/opamp-lm741-tester-circuit I'll draw it out correctly, but basically it's twice the above circuit with pin 7 Vcc changed to pin 8, and the LM358 amps are pins 2-;3+;1 out; 6-;5+; 7 ... LM358 Dual Op Amp Tester

Nice LED Clock Kit

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A really well put together kit and design! Pleasure to build and all functions work - time, date - room temperature accurate too, cross checked by my Weather Station DHT 11 sensor. Full instructions at link below. https://www.diyleyuan.com/jc/082v4.html

Another 741 Op Amp Test Circuit

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From GC Loveday; Electronic Testing and Fault Diagnosis, p67. I changed the 0.1uF for a 2.2uF for a slower flash rate, and the 680R for a 310R for a brighter LED. I had a 100nF not a 10nF also. Compare with the last one in prior Post:

Technics SU-X911 – multiple issues

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Ebay Casualty:-  Please note: The unit powers on and amplifies however there are multiple issues when the unit does so. When linked to any type of speakers the left speaker connections do not work at all, meaning the only sound that can be heard is out of the right speaker. When amplifying- music, the sound is ... Technics SU-X911 – multiple issues

Technics SU-V1X – No Power

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A nice 40W monster from the 80s! Was working - stored for years, now not turning on after the last owner tried to recently...allegedly... Poor old bugger! Look at the dust in this thing - no wonder it won't turn on! First thing - get the hoover out...! That did not work at all - ... Technics SU-V1X – No Power

Weather Station Complete

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Packed in a Neo6 GPS, BMP180, DHT11 and OLED screen controlled by a Nano fixed into female headers for easy component swap out and height gain- shame about my engineering skills, but..it works, and finally used that 6 year old project box..: Nano code: /****************************************************************************** Steve_GPS_DHT_BMP_OLED.ino based on: TinyGPSPlus_GPS_Shield.ino TinyGPS++ Library Example for the SparkFun ... Weather Station Complete

LM358 VCO Circuit

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This isn't clear for beginners, but V/2 at pin 5 non-inverting input of amp 2 means you have to add another 2 x say, 10k resistors as a voltage divider to supply the correct voltage at pin 5 - NOT the full PSU voltage (5V) as I did at first - else it won't work. ... LM358 VCO Circuit

Kentiger HY-502S Amp

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These are good amps for the size, function and cost - if you have a 3-5A, 12V PSU already?! They can be improved by modding according to: https://www.radioworld.com/tech-and-gear/modding-the-kentiger-hy502s-audio-unit ..agreed, those LEDs are annoying, better if they had been volume levels, not a disco.. Ok, you can buy a classic 90s used amp on Ebay for ... Kentiger HY-502S Amp

Two Transistor Schmitt Trigger; Converts Analogue Signal to Digital Output

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This essential circuit converts an analogue signal to a digital output: https://stevepedwards.today/howtomechatronics.com/how-it-works/electrical-engineering/transistor-schmitt-trigger/ This circuit gives a max output of 3.8V digital from a 3.8V sine input; The Vcc can be no more than 5V else the top threshold of this circuit design is crossed and the output goes to 0V; the input must be no ... Two Transistor Schmitt Trigger; Converts Analogue Signal to Digital Output

Reading Remote Control Codes With Arduino

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Old remotes can be re-purposed: Following this Post using the IR sensor connections - forget the LEDs just for reading codes: https://stevepedwards.today/maker.pro/arduino/tutorial/how-to-control-leds-with-arduino-ir-sensor-and-remote #include <IRremote.h> #define first_key 48703 #define second_key 58359 #define third_key 539 #define fourth_key 25979 int receiver_pin = 8; int first_led_pin = 7; int second_led_pin = 6; int third_led_pin = 5; int fourth_led_pin = ... Reading Remote Control Codes With Arduino

Simplest Transistor Oscillator and Breadboard Crystal Oscillator Actually Working!

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To have a more complete understanding of today's networked tech world, you have to link some key electronic fundamentals to the OSI layer 1 area of IT networking that deals with the actual voltages that generate binary values 1 and 0 that have to be regulated/counted with reference to time of an accurate reference clock ... Simplest Transistor Oscillator and Breadboard Crystal Oscillator Actually Working!

Atmega 8L Inductance/Capacitance Kit – Good Cheap Chinese LC Tester – If you have the missing bits!

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All explained in the vid as I couldn't find any info on this thing when I thought it was dead on arrival...again with Chinese stuff, ya pays ya -£18.00 and ya roll the dice...! A nice kit to build actually; as usual test all the component values before you place them so you have a ... Atmega 8L Inductance/Capacitance Kit – Good Cheap Chinese LC Tester – If you have the missing bits!

Showing GPS and DHT11 Temp/Humidity in 128×32 OLED with 2 Text Sizes

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This code adds DHT data and removes the serialmon data to thin the code. Also showing the only next text size up from size 1-2 in the OLED. /****************************************************************************** Steve_GPS_OLED.ino to display GPS and DHT11 data in OLED, adapted from: TinyGPSPlus_GPS_Shield.ino TinyGPS++ Library Example for the SparkFun GPS Logger Shield By Jim Lindblom @ SparkFun ... Showing GPS and DHT11 Temp/Humidity in 128×32 OLED with 2 Text Sizes

Showing GPS data in 128×32 OLED

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Finally answered some programming fundamentals for myself! The detailed declarations outside of void setup(){} and loop(){} are effectively code modules that can then called as condensed functions later e.g in the main loop (if you want)..duh. I got the oled char code to get going from the Adafruit GFX example. The most important thing I've ... Showing GPS data in 128×32 OLED

Neo 7/Uno/Nano showing accurate GPS clock LCD location data via pins 8/9

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https://stevepedwards.today/learn.sparkfun.com/tutorials/gps-logger-shield-hookup-guide/example-sketch-tinygps-serial-streaming https://www.gpsinformation.org/dale/nmea.htm https://www.sparkfun.com/gps Build a gps time referenced clock https://stevepedwards.today/learn.sparkfun.com/tutorials/alphanumeric-gps-wall-clock TinyGPSPlus_GPS_Shield.ino /****************************************************************************** TinyGPSPlus_GPS_Shield.ino TinyGPS++ Library Example for the SparkFun GPS Logger Shield By Jim Lindblom @ SparkFun Electronics February 9, 2016 https://stevepedwards.today/github.com/sparkfun/GPS_Shield This example uses SoftwareSerial to communicate with the GPS module on pins 8 and 9. It uses the TinyGPS++ library to parse the ... Neo 7/Uno/Nano showing accurate GPS clock LCD location data via pins 8/9

Uno/Nano LCD arduino-weather-station-2, DHT11, BMP80

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Local weather station (Perranporth) using a Vantage Pro2: https://www.sueandalan.plus.com/weewx/index.html OK! According to: https://stevepedwards.today/routecalculator.co.uk/elevation my address elevation IS the same as my phone App states, so can be added to the BMP180 code later, as my local ref. - Altitude: 84 m. (276 ft) But first, check the sensors work!: DHT11-Datasheet DHT middle pin out to ... Uno/Nano LCD arduino-weather-station-2, DHT11, BMP80

Combining Code from BMP180 and Thermistor LCD Output

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https://youtu.be/V73NPS6-OYI https://stevepedwards.today/wmrx00.sourceforge.net/ https://youtu.be/DXGtw0zpOqY After a lot of trial and error for the order that the 2 code pieces display their resp. data to LCD and serial monitor, I got both sensors to print to the LCD while keeping the BMP180 serial display: CODE: #include <LiquidCrystal.h> #include <Wire.h> #include <Adafruit_BMP085.h> Adafruit_BMP085 bmp; int ThermistorPin = 0; ... Combining Code from BMP180 and Thermistor LCD Output

Bosch BMP180 Pressure Sensor

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3.6V in MAX. pin1 Vcc pin2 GND pin3 SerialCLock pin4 SerDAta Least sensor seems to work. #include <Wire.h> #include <Adafruit_BMP085.h> Adafruit_BMP085 bmp; void setup() { Serial.begin(9600); bmp.begin(); } void loop() { Serial.print("Temperature (C)= "); Serial.print(bmp.readTemperature()); Serial.print(" Pressure (Pa)= "); Serial.print(bmp.readPressure()); Serial.print(" Altitude (m)= "); Serial.print(bmp.readAltitude()); Serial.println(); delay(200); } I got a better Gplay App for ... Bosch BMP180 Pressure Sensor

Arduino Examples – Basics Dir 1

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From https://www.arduino.cc/ ARDUINO 1.8.9 IDE zip file This example shows DAC info visually and as a serial stream: Read a potentiometer, print its state out to the Arduino Serial Monitor. https://www.arduino.cc/en/Tutorial/AnalogReadSerial /* AnalogReadSerial Reads an analog input on pin 0, prints the result to the Serial Monitor. Graphical representation is available using Serial Plotter (Tools ... Arduino Examples – Basics Dir 1

EZM 1Hz-999kHz DDS Functional Signal Generator

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https://www.amazon.co.uk/KKmoon-Precision-Generator-Adjustable-Frequency-transparent/dp/B01HMBFSPQ/ref=sr_1_9?crid=2HY6LBDX864QP&keywords=kkmoon+signal+generator&qid=1568732073&s=gateway&sprefix=kk+moon+sig%2Caps%2C159&sr=8-9 This, with my Hantek DSO5102P (Ebay -£170 with shipping) has added the bare min requirements of a hobby electronics tinkerer to get anywhere in understanding electronics to any meaningful degree for the -£20.99 cost and removed the hassle of using a PC with sound card outs, FLS or other wave generator software - which ... EZM 1Hz-999kHz DDS Functional Signal Generator

XR2206 Function Gen

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https://www.amazon.co.uk/gp/product/B01HMBFSPQ/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1  

Lysignal Fever 6J1 Tube Amplifiers Board

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Lysignal Fever 6J1 Tube Amplifiers Board Preamplifier Headphone Pre-Amp Amplifier Audio Board DIY Kits -£14.69 Specifications: *Models: 6J1 tube *Channel types: 2.0 / stereo *Working voltage: AC12V 0.8 A *The power interface: 5.5 * 2.5 plug *Circuit board size: 77 x 75 x 52 mm *Potentiometer role: volume adjustment + power switch. Package Included : ... Lysignal Fever 6J1 Tube Amplifiers Board

Lysignal Fever 6J1 Tube Amplifiers Board – Safe Novice Valve Amp Intro

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Lysignal Fever 6J1 Tube Amplifiers Board Preamplifier Headphone Pre-Amp Amplifier Audio Board DIY Kits £14.69 Specifications: *Models: 6J1 tube *Channel types: 2.0 / stereo *Working voltage: AC12V 0.8 A *The power interface: 5.5 * 2.5 plug *Circuit board size: 77 x 75 x 52 mm *Potentiometer role: volume adjustment + power switch. Package Included : ... Lysignal Fever 6J1 Tube Amplifiers Board – Safe Novice Valve Amp Intro

Arduino Intro on Linux Mint

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I bought the Elegoo R3 Project Super Starter kit from Amazon, -£30: What you get, more or less: In one evening I got the first basics done - A/D converter-  resistor, temp/humidity sensor then the thermistor/LCD projects. Very educational! sudo apt install arduino sudo tail -f /var/log/syslog Plug in Arduino Uno R3 to printer cable ... Arduino Intro on Linux Mint

Laney Vintage Reverb Tank Notes

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I jumped at this Ebay bargain knowing that Gibbs reverbs of this size are about US$50 or more, and then there are the import fees. I expected this old one to sound as nice due to its size. A few things I want to document for future regarding the input and output sides of different ... Laney Vintage Reverb Tank Notes

2008 Carlsbro TC60 Repair – Fixed

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After having the resonance feedback type scenario through the cab speakers at high volumes and thinking the issue may have been sound feedback and there is nothing wrong, I looked for other issues possibly affecting the output tubes just to be sure before re-assembly and found a burnt resistor R83 at the cathode of one ... 2008 Carlsbro TC60 Repair – Fixed

2008 Carlsbro TC60 Repair – Part 2

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This thing came out in 2008 it seems: https://www.performing-musician.com/pm/aug08/articles/carlsbrotc60.htm Tech Spec TC60 60W all-valve combo. Two EL34 output valves. Four 12AX7 preamp valves. True class A/B operation. Twin channel (clean, lead). 1 x 12-inch speaker. Classic three-band passive EQ. Series/parallel switchable FX loop. Accutronics licensed spring reverb. Extension speaker output. Dimensions (WDH): 594 x 305 ... 2008 Carlsbro TC60 Repair – Part 2

2008 Carlsbro TC60 Repair – Part 2

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This thing came out in 2008 it seems: https://www.performing-musician.com/pm/aug08/articles/carlsbrotc60.htm Tech Spec TC60 60W all-valve combo. Two EL34 output valves. Four 12AX7 preamp valves. True class A/B operation. Twin channel (clean, lead). 1 x 12-inch speaker. Classic three-band passive EQ. Series/parallel switchable FX loop. Accutronics licensed spring reverb. Extension speaker output. Dimensions (WDH): 594 x 305 ... 2008 Carlsbro TC60 Repair – Part 2

1962 Fender Tremolux Repair

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This is another vintage classic from John B's collection for repair. A 1960's model - it looks like a Blonde with the light colour cloth - with the label still intact - model 6G9B. This amp is in a sorry state due to an incorrect OT amongst other things: The choke serial number is 1253C3A. ... 1962 Fender Tremolux Repair

Laney Klipp 100W Repair and Design Study – Part 1

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DISCLAIMER:    READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity – which happens to be in the 400 to 500V +DC range of our valve amp circuits! BE CAREFUL! Drain and check WITH A METER the PT secondary capacitors when the circuit is off before touching components ... Laney Klipp 100W Repair and Design Study – Part 1

Laney Klipp 100W Repair and Design Study – Part 1

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DISCLAIMER:- - - - READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity - which happens to be in the 400 to 500V +DC range of our valve amp circuits! BE CAREFUL! Drain and check WITH A METER the PT secondary capacitors when the circuit is off before touching components ... Laney Klipp 100W Repair and Design Study – Part 1

Understanding Amp Load Lines

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NB: 6/1/14 When I started this Post I didn't expect how long but interesting and rewarding it would be - to study this whilst applying the Load Lines to a real world scenario - the Maggie amp. Trying to solve its early volume level distortion problem was the perfect opportunity for this topic as I ... Understanding Amp Load Lines

Amp Power Output Calculations

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Amp Power Output Calculations PP18 Power Calculations Using the Aiken amp info from the Q+A page here: https://www.aikenamps.com/TI_Aiken_Q&A.html It is possible to check accurately, the power output of your amp with a dual beam oscilloscope, and knowing the speaker impedance you are connecting to. The rest comes from calculation as stated in the above article. ... Amp Power Output Calculations

Global Negative Feedback on the PP18

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29/12/13- - - - - - - - Global Negative Feedback on the PP18 I returned to the noisy rectifier hash ridden PP18 problem as it was still bothering me immensely not knowing the exact cause, and not having a suitable fix more so. I re-read the global negative feedback pages 164 and 188 of Blencowe but was still wondering if it was ... Global Negative Feedback on the PP18

PP18_6V6 Build Summary

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3 I reversed the image in MSPaint so I can build and test mine left to right from Mains PT on, in logical stages. This is less tedious though takes much longer, but you learn and think more about how each stage works. Also, if there is a fault, you need only look as far ... PP18_6V6 Build Summary

1967 Marshall JMP 100W Buyer’s Info

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  1967 Marshall JMP 100W Buyer's Info ---------------------------------------------------------------------- DISCLAIMER This amp is not my property and I am selling it on behalf of the owner via my Ebay account. Do not contact me with complaints or technical problems after sale - be prepared to get it professionally serviced before use. I am being honest and ... 1967 Marshall JMP 100W Buyer’s Info

1967 Marshall JMP 100W Buyer’s Info

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  1967 Marshall JMP 100W Buyer's Info ---------------------------------------------------------------------- DISCLAIMER This amp is not my property and I am selling it on behalf of the owner via my Ebay account. Do not contact me with complaints or technical problems after sale – be prepared to get it professionally serviced before use. I am being honest and ... 1967 Marshall JMP 100W Buyer’s Info

Marshall 100W Mains Tests Data

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Marshall 100W Mains Tests Data I was a bit thrown by the low DC resistances of the windings of this at first, as 2-5 ohms seems really low compared to the smaller Danbury transformers I have measured (30 ohms primary, or so), so I removed it to test it properly using a Variac. I initially ... Marshall 100W Mains Tests Data

Gibson GA 15 Amp Repair

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Gibson GA 15 Amp Repair My old college chum, John Bickersteth (Lazy Lester, Incredible String Band) brought me his 15W valve amp, as it has a blown EL84. It's an opportunity to get a look at another design of amp for me, and do him a favour also. I got it complete with cobwebs and ... Gibson GA 15 Amp Repair

Amplifier Output Frequency Responses

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Amplifier Output Frequency Responses I thought it would be helpful while doing the Output Section Posts to log some data for my different amps output stages, either across the 6V6 anode, the 8/16 Ohm speaker output or both, depending on accessibility to the leads etc. I'm not taking them apart to do it! In the ... Amplifier Output Frequency Responses

Handbook Amp Project – Part 4 – Input Section

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NOTE on terminology – I have learned to NOT use the terms "Earth" and "Ground" interchangeably. They are functionally different electrically: https://www.valvewizard.co.uk/Grounding.pdf An Earth is a voltage reference point (Planet Earth and 0V usually) and a connection point for equipment electrical safety. The connection to Planet Earth at some point is made by driving a ... Handbook Amp Project – Part 4 – Input Section

Handbook Amp Project – Part 4 – Input Section

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NOTE on terminology - I have learned to NOT use the terms "Earth" and "Ground" interchangeably. They are functionally different electrically: https://www.valvewizard.co.uk/Grounding.pdf An Earth is a voltage reference point (Planet Earth and 0V usually) and a connection point for equipment electrical safety. The connection to Planet Earth at some point is made by driving a ... Handbook Amp Project – Part 4 – Input Section

Handbook Amp Project – Part 2 – Mains Electricity and Transformer

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DISCLAIMER: The following is NOT to be taken as a definitive procedure for building or repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If you have ANY doubt about building or making modifications or ... Handbook Amp Project – Part 2 – Mains Electricity and Transformer

Handbook Amp Project – Part 2 – Mains Electricity and Transformer

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DISCLAIMER: The following is NOT to be taken as a definitive procedure for building or repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If you have ANY doubt about building or making modifications or ... Handbook Amp Project – Part 2 – Mains Electricity and Transformer

Ibanez Five Position Switch Adventure

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Ibanez Five Position Switch Nightmare 12/5/12 I thought I would document a little of my frustrating (but ultimately rewarding) experiences yesterday and today, of changing my noisy guitar switch for an Ebay replacement. You may save some trouble if you are doing this yourself, by NOT making some of the mistakes I made. The rewarding ... Ibanez Five Position Switch Adventure

Fender Champ 12 Repair

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Fender Champ 12 Repair ---------------------------------------------------------------------------- Addition 6/6/13 READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity - which happens to be in the 400 to 500V DC range of our amp circuits! BE CAREFUL! Drain the secondary capacitors when the circuit is off and always check ... Fender Champ 12 Repair

Ashdown Fallen Angel 40W Repair

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Ashdown Fallen Angel Repair 17/1/13 --------------------------------------------------------------------------- Addition 6/6/13 READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity - which happens to be in the 400 to 500V DC range of our amp circuits! BE CAREFUL! Drain the secondary capacitors when the circuit is off and always ... Ashdown Fallen Angel 40W Repair

Using FLS As A Test Signal Generator With DSO Nano

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Using FLS As A Test Signal Generator With DSO Nano 13/1/13 ——————————————————-————————————————————————— DISCLAIMER: The following is NOT to be taken as a definitive procedure for repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If ... Using FLS As A Test Signal Generator With DSO Nano

Aston Electronics 5W Valve Amp Kit Build – Finished

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Aston Electronics 5W Valve Amp Kit Build - Finished --------------------------------------------------------------------------- Addition 6/6/13 READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity - which happens to be in the 400 to 500V DC range of our amp circuits! BE CAREFUL! Drain the secondary capacitors when the circuit ... Aston Electronics 5W Valve Amp Kit Build – Finished

Aston Electronics 5W Valve Amp Kit Build – Start

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Aston Electronics 5W Valve Amp Kit Build - Start --------------------------------------------------------------------------- Addition 6/6/13 READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity - which happens to be in the 400 to 500V DC range of our amp circuits! BE CAREFUL! Drain the secondary capacitors when the circuit ... Aston Electronics 5W Valve Amp Kit Build – Start

Marshall Mercury 2060 – Repaired!!

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Marshall Mercury 2060 – Repaired!! --------------------------------------------------------------------------- Addition 6/6/13 READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity – which happens to be in the 400 to 500V DC range of our amp circuits! BE CAREFUL! Drain the secondary capacitors when the circuit is off and always ... Marshall Mercury 2060 – Repaired!!

Marshall Mercury 2060 – Repaired!!

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Marshall Mercury 2060 - Repaired!! --------------------------------------------------------------------------- Addition 6/6/13 READ THIS!!! https://stevepedwards.today/en.wikipedia.org/wiki/Electric_shock There is a big effect difference between voltage levels that break through the skin conductivity - which happens to be in the 400 to 500V DC range of our amp circuits! BE CAREFUL! Drain the secondary capacitors when the circuit is off and always ... Marshall Mercury 2060 – Repaired!!

Marshall Mercury 2060 Repair – Week 2-3, Circuit Theory

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Marshall Mercury 2060 Repair – Week 2-3, Circuit Theory ---------------------------------------------------------------------------------------------------------------------------------- DISCLAIMER: The following is NOT to be taken as a definitive procedure for repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If you have ... Marshall Mercury 2060 Repair – Week 2-3, Circuit Theory

Marshall Mercury 2060 Repair – Week 2-3, Circuit Theory

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Marshall Mercury 2060 Repair - Week 2-3, Circuit Theory ---------------------------------------------------------------------------------------------------------------------------------- DISCLAIMER: The following is NOT to be taken as a definitive procedure for repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If you have ... Marshall Mercury 2060 Repair – Week 2-3, Circuit Theory

Marshall Mercury 2060 Repair – Days 4-6

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Marshall Mercury 2060 Repair – Days 4-6 ---------------------------------------------------------------------------------------------------------------------------------- DISCLAIMER: The following is NOT to be taken as a definitive procedure for repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If you have ANY doubt ... Marshall Mercury 2060 Repair – Days 4-6

Marshall Mercury 2060 Repair – Days 4-6

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Marshall Mercury 2060 Repair - Days 4-6 ---------------------------------------------------------------------------------------------------------------------------------- DISCLAIMER: The following is NOT to be taken as a definitive procedure for repairing ANY electronic device and the author takes NO responsibility for any damage or injury that results from anyone using this guide. It is intended for educational purposes ONLY. If you have ANY doubt ... Marshall Mercury 2060 Repair – Days 4-6