Eico Sine and Square Audio Wave Generator | eBay!. Audio Generator Equipment EICO Electronic Instrument Brooklyn, build , 11 pictures, 2 schematics, 5 tubes, United States of America. Used Eico Vacuum tubes for sale on + second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability.

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Yours is a 2 gang, dico means all of the resistors in the tuning circuit are different also. I spent an hour slowly working the face plate and chassis back into shape.

Audio Generator 377

KindaFuzzyDec 28, rico I did not have a real requirement for another audio generator but the price was right and I like collecting old test equipment. I am guessing that in stock form the generator could not be adjusted low enough in level or precisely enough for the application without some additional attenuation.

The 6FG7 replaces the 6SN7. However, there is no 6×5 not even an empty hole for it and the tubes are: Dec 29, 8. Delivery times may vary, especially during peak periods. Here’s how I think things may eick been changed: The distortion was tested across a ohm load.

Audio Generator Equipment EICO Electronic Instrument Co.

The way I have it in the photos is the way that I tried it first, with the 6BQ5 in the “north” socket, which did produce a recognizable sine wave, though not very pretty. Add to watch list Add to wish list. Last edited by ’66Cuda on Sep Tue 06, 4: A special thank you to the ‘new’ guys that helping out.


Are you sure this is the right number? Overall the HP is a much better oscillator but the Eico is definitely a usable piece of test equipment. More chances to get what you want Eici on our suggestions – More chances to get what you want. Dec 28, 4.

Apparently it was purchased and never used. None of the tubes you listed belong in there.

Eico 377 to 5c1 Champ conversion

When I opened it up, it was obvious this thing has taken a fall of major proportions. I tried to hook this up direct to an old speaker to hear it, but got nothing. A total of 5 tubes are used including a 6X5 rectifier. The output is high impedance and not meant to drive a speaker.

Search Media New Media. Dec 28, 2. However, Eico’s documentation always matched the item that was shipped; eicco generator came with a manual that reflected the tube line-up in it. Sell one like this.

Eico Sine and Square Audio Wave Generator | eBay

Jan 13, Function or Waveform Generator Model: Thanks for the info and the ideas. The schematic you posted is of the oldest variant which used a 4 gang variable capacitor. I hoped that since the original version was the eeico tube, that switching eio two wouldn’t be catastrophic I readily admit that may not have a been a fair assumption and I may have just got lucky I also brought it up slowly on my current limiter and Variac, while wico at the signal with a scope, and watching the tubes.


The audio cable that came with the generator looked like it was made to check stereo amplifiers. I never thought about it being a newer model. This is an Ebay buy that I figured I would be replacing capacitors on, not trying to figure out what the thing even is!

Nice job, cool that you actually used the variable cap. I am working on a right now as well. Too funny, love it. Your name or eoco address: Eico or IS it?

I power it up slowly using a Variac on the ac line. If it’s wired for a 6SQ7 the heater voltage will be between pins 7 and 8. Estimated on or before Thu. Now I’m curious to find out if they were octal.