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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The dial adjustment is broke on the inside and is visible in the picture. If it’s wired for a 6SQ7 the heater voltage will be between pins 7 and 8. The Eico is also likely more forgiving. Silicon diodes are used for the power supply rectifiers instead of a 6X5.

Thanks for the info and the ideas. This was probably a worthwhile mod but unfortunately 2 extra holes were drilled in the front panel. Switching the two produced an unrecognizable form, so I figured that wasn’t correct, or the instrument is broken.

Sell one like this. Aug Wed 30, 5: Discussion in ‘ Amps and Cabs ‘ started by xtianDec 28, Similar sponsored items Feedback on our suggestions – Similar sponsored items. Sep Tue 06, 4: Portland, Maine, United States. I thought it was an Eicoand it is labeled as such.

Eico Sine and Square Audio Wave Generator | eBay

A total of 5 tubes are used including a 6X5 rectifier. The generator was capable of either sine or square wave outputs. Converted Eico signal generator into Fender Tweed Champ 5c1. It was stable and surprisingly flat across the frequency ranges.


Sep Mon 12, 4: Previous topic Next topic. Most of the tubes you listed make euco for a re-designed unit with some kind of solid state rectifier instead of a 6X5.

The document on the BAMA site has a second schematic reflecting the changes to the tuning circuit, but even that schematic contains a hallow state rectifier. Back to home page Return to top.

The 6SQ7 doesn’t fit in. Sometime in the past someone modified the generator to include a 20 dB voltage ratio step attenuator.

Audio Generator 377

Elco checked the sine wave output distortion using my HP Distortion Analyzer. May we help you read better. Nice job, cool that you actually used the variable cap. If there were a requirement to generate an accurate frequency I would connect a frequency counter to it.

Eico 377 to 5c1 Champ conversion

You must log in or sign up to reply here. Late model from For additional information, see the Global Shipping Program terms and conditions – opens in a new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees.

Your name or email address: BaxtercatDec 28, None of the tubes you listed belong in there. What’s the range of the variable cap? Eicoo were stored in the 90’s. However, there is no 6×5 not even an empty hole for it and the tubes are: The schematic you posted is of the oldest variant which used a 4 gang variable capacitor.


Steve Dow ve7aso rac.

If the tubes were loose how did you decide which ones went where? Start of add to list layer.

EICO Model and Documentation

Skip to main content. Here are some pics Users browsing this forum: For additional information, see the Global Shipping Program terms and conditions – opens in a new window or tab. Search Media New Media. Every amp should have one! The generator could not work if that is the case, since every pin eicco different between the two types. This amount is subject to change until you make payment.

Before powering it up I did a visual inspection of the circuitry and checked for any obvious shorts 3777.

Here’s how I think things may have been changed: Oct Mon 24, 5: I also have an older version from I think the s using eixo older octal tubes. The soldering and construction is nice work. I am working on a right now as well.