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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Used it as a variable bright cap across the volume pot.

Books Support This Site: I edited the original post to include the pics. The tubes were loose and rolling around inside the case when I got it. If there were a requirement to generate an accurate frequency I would connect a frequency counter to it.

Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Eixo – opens in a new window or tab. Sep Tue 06, 5: If the tubes were loose how did you decide which ones went where?

Eico 377 to 5c1 Champ conversion

I also have an older version from I think the s using the older octal tubes. Unknown what you really got. The generator worked without doing any repairs.


No, create an account now. Are you sure this is the right number? The exact tube line up, internal parts, even the colors of the case and front panel could be different depending on when it was made. BaxtercatDec 28, Sep Mon 12, 4: Dec 28, 1. Getting to them isn’t simple. A total of 5 tubes are used including a 6X5 rectifier. It came 3777 3 spare tubes used and an audio cable. If the 6SQ7 is a mistake and a 6SJ7 really belongs in there, the wiring will correspond to the schematic.

I pretty much guessed on the tube locations.

Back to home page. The only one that doesn’t make any sense is the 6SQ7 in place of the 6SJ7, since those two tubes are not similar. Skip to main content. Dec 28, 3.

Audio Generator 377

If it was an intentional change, the socket wiring will not match the schematic. This was probably a eicl mod but unfortunately 2 extra holes were drilled in the front panel. Search Media New Media. The distortion was tested across a ohm load.

It is obvious someone has updated the capacitors. Others above have already pointed out that most of the tubes in the unit are functionally similar, so you will probably find that the generator is indeed as shown if you re-draw the diagram with the pin-outs of the tubes that are present.


The mini tube was obvious due to socket size. A 377 of the correct manual for your generator may still come to light. Dec 29, 7.

Thanks for the info and the ideas. Home Forums Recent Posts.

The VE6KQ Website – Eico Audio Generator

This amount is subject to change until you make payment. The square wave performance is OK and seems to be optimal around Hz. I power it up slowly using a Variac on the ac line. A 6SJ7 would make sense and the socket wiring seems to fit as much as I can tell from the pic. Previous topic Next topic. Sep Tue 06, 3: Steve Dow ve7aso rac. Note that big variable capacitor in the middle?

I hoped that since the original version was the same tube, that switching the 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 looking at the signal with a scope, and watching the tubes.