EICO 377 MANUAL PDF

You are bidding on an EICO model Sine and Square Wave Audio Generator. EICO model Audio Generator; Original Instruction Manual (c) Instruction Manual for Eico Model Sine and Square Wave Audio Generator ( 2 copies). Illustrated with diagrams. Attached to one of the manuals is a reprint. free eico manual pdf – mandalayschoolforthedeaf – eico manual find great deals on ebay for eico test equipment in signal generators. shop with eico.

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I am ordering the correct tubes.

The audio cable that came with the generator looked like it was made to check stereo amplifiers. If it’s wired for a 6SQ7 the heater voltage will be between pins 7 and 8. I power it up slowly using a Variac on the ac line. Sometime in the past someone modified the generator to include a 20 dB voltage ratio step attenuator.

The soldering and construction is nice work.

Getting to them isn’t simple. The mini tube was obvious due to socket size. I checked the sine wave output distortion using my HP Distortion Analyzer. 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.

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Instruction Manual for Eico Model 377 Sine and Square Wave Audio Generator (2 copies)

Now I’m curious to find out if they were octal. I have one exactly like it. A total of 5 tubes are manuwl including a 6X5 rectifier.

I did not have a real requirement for another audio generator but the price was right and I like collecting old test equipment. Yours is a 2 gang, which means all of the resistors in the tuning circuit are different also.

Audio Generator Equipment EICO Electronic Instrument Co.

The 6SQ7 doesn’t fit in. It is marked as and looks like a but must be a later model using miniature tubes instead of octals.

Sep Mon 12, 4: Oct Mon 24, eoco Aug Wed 30, 5: I spent an hour slowly working the face plate and chassis back into shape. I am new to the hobby and am not real sure what to do now. The tubes were loose and rolling around inside the case when I got it.

Audio Generator 377

A copy of the correct manual for your generator may still come to light. The square wave performance is OK and seems to be optimal around Hz.

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Eico or IS it? If the socket is wired for a 6SJ7 it will appear between pin 2 and pin 7. 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.

A comprehensive manual is available on the BAMA website. Sep Tue 06, 4: It is obvious someone has updated the capacitors. However, Eico’s documentation always matched the item that was shipped; your generator came with a manual that reflected the tube line-up in it.

DavidH, Google [Bot]Johnnysan and 2 guests. Previous ieco Next topic. If the tubes were loose how did you decide which ones went where?

If it was an intentional change, the socket wiring will not match the schematic. Steve Dow ve7aso rac.