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 did not have a real requirement for another audio generator but the price was right and I like collecting old test equipment.

The VE6KQ Website – Eico Audio Generator

It came with 3 spare tubes used and an audio cable. A comprehensive manual is available on the BAMA website. A total of 5 tubes are used including a 6X5 rectifier. The generator was capable of either sine or square wave outputs.

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Before powering it up I did a visual inspection of the circuitry and checked for any obvious shorts etc. I power it up slowly using a Variac on the ac line.

EICO Model and Documentation

The generator worked without doing any repairs. It was stable and surprisingly flat across the frequency ranges.

I checked the sine wave output distortion using my HP Distortion Analyzer. The distortion was tested across a ohm load.

The dial accuracy is OK but not great. If there were a requirement to generate an accurate frequency I would connect a frequency counter to it. The square wave performance is OK and seems to be optimal around Hz.

Sometime in the past someone modified the generator to include a 20 dB voltage ratio step attenuator. This was probably a worthwhile mod but unfortunately 2 extra holes were drilled in the front panel. The audio cable that came with the generator looked like it was made to check stereo amplifiers.

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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. This generator has become my preferred generator for use over my HP oscillator. The only minor reason for this is that if something goes wrong while testing boat anchors, for example, and because of their manuap voltages involved I would prefer to repair the Eico over the more precise HP.

The Eico is also likely more forgiving. Overall the HP is a much better oscillator but the Eico is definitely a usable piece of test equipment. I have four other pieces of Eico equipment.