Notice to users of System Access to go. This program has some well meant abbreviation translators that result in some strange spoken phrases when reading technical material. If the common abbreviation for frequency modulation is preceeded by a number it is read as fathoms. I just can't fathom this one. The abbreviation for milli amps is read as mega amps. I guess they aren't electrical engineers or physicists. If the preposition in happens to be preceded by a number it is read as inches. If the letter P is followed by a number, such as in a model number for a piece of equipment made by Hewlett-Packard, it is read as pages. So, don't be alarmed when you read, quote, I used my H pages 410C to measure a current at test point 3 inches my AJ 15 fathoms tuner and it was 42 mega amps. End quote. I hope they get around to fixing this some day.
I'm sorry but I can't come up with a way of making the old parts catalogs accessible. They are scans of catalog pages. Typing them in as ASCII text is just more work than I can do.
What do I need to have fun with tubes?
Click here for the answer.
Vacuum tubes with 2, 3, and 5, grids.
A M, S S B and FM, communications.
Restoring life to dead electrolytic capacitors.
Reading color and numeric codes on resistors and capacitors.
Designing and building Speakers.
An inexpensive way to alter the line voltage without investing in a Variac.
Low Resistance Adapter for your Digital Multi Meter.
Using the Adapter to Evaluate Unmarked Power Transformers.
Eight simple power supplies for your circuits.
Bench Power Supply and Audio Amplifier so you can power and listen to your radios.
4 Methods of breadboarding Tube Circuits.
Using an I C Socket Breadboard for Tube Circuits.
The Best Breadboard for Tube Circuits.
A Dedicated Headphone Amplifier for modern phones.
A load box for testing power supplies under load.
A story about the original Koss headphones and an amplifier built in the 1960s.
How to make your own 455 kc I F transformers without winding a single coil, or a married one either.
A phase locked loop local oscillator for A M radios. Gilding the lily? Probably.
Silver tone Radio, Phonograph, Wire Recorder, Combination.
Circuit Diagrams Sent in by Viewers of this Page.
E mail me. I'd love to hear from you.
How A M (Amplitude Modulation) Works.
Winding coils for your crystal set or tube radio.
How to Build a Crystal Set in these modern times.
Recreate Lee De Forest's original Audion.
The Grid leak Detector Circuit.
The Infinite Impedance Detector Circuit.
The Regenerative Detector Circuit.
The T R F (Tuned Radio Frequency) Receiver.
The Simple Super Heterodyne Receiver.
A 4 Tube Superhet for chasing D X on the A M Broadcast Band.
Introduction and Power Supply.
The I F (Intermediate Frequency Amplifier Section.
Cautions, Precautions and Troubleshooting.
Power and Output Transformers.
The power supply for a single channel 6V6 amplifier.
A Technical Discussion of Power Supplies. Not for the faint hearted.
The Resistance Coupled Amplifier, a Basic Building Block.
Phase Inverters, Phase Splitters and Drivers.
Overall Feedback, Pros and Cons.
The Federal Trade Commission and Amplifier Power.
How much power is enough? A Low Distortion Gain Block.
Testing a resistance coupled amplifier with and without the cathode bypass capacitor.
Practical tone control circuits and where to insert them.
Phase splitter/driver, the heart of an amplifier.
Experiments with a triode power amplifier.
How to design a tube amplifier with feedback.
A 50 Watt Monoblock Amplifier with 4 6L6 tubes.
An Ultra Linear Monoblock Amplifier.
A Triode amplifier using 4 6L6s.
50 watt per channel ultra linear stereo amplifier using EL34s.
Restoring a 1937 Battery Operated Philco Radio.
Restoring a Heathkit 0 to 400 volt Regulated Power Supply.
Restoring a Harman-Kardon A-300 amplifier.
Tour my A M Kilowatt Ham Transmitter.
Tour my Tube High Fi and Stereo.
Here are some random rantings and ravings about things that bother me.
Free Programs you can download.
Everything you always wanted to know about
vacuum tubes but didn't know who to ask.
Here is a picture drawn by Sue of an old style tube with a face and arms. Click here. SHA ZAM!">
See questions submitted to Tube Man and his answers. I apologize for being so far behind on this page but I'll catch up someday.