Eico experts needed: PEC in 2050 driver stage bad - diyAudio
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Old 13th September 2011, 07:46 PM   #1
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Default Eico experts needed: PEC in 2050 driver stage bad

Eico 2050 integrated stereo tube amp: There's a package electronic circuit (PEC) in the driver stage. Mine is not passing signal. Large number is 29754 and above it is a smaller number 1346330. Anyone have a diagram of what's in there?? It has 6 wires coming out of it... Suggestions??
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Old 13th September 2011, 08:48 PM   #2
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Going on the assumption that Eico used similar parts in various products, this might be some help to or to get a start. Many of these "PCs" were made by Centralab and used in the tone control circuit. If yours is not, try jumping the input to output with a capacitor and see if you can get sound to come through. This is from an Eico HF81.
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Old 13th September 2011, 09:10 PM   #3
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Hollowstate, My PC is in the driver stage. It does have PCs in the tone circuit and they're working at the moment..... This is the first time I've seen PCs used in the driver stage. Maybe the 2080 has the same thing?
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Old 13th September 2011, 10:50 PM   #4
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Crispy -- Another thought to consider is that so much of the "Classic" series of Eico amplifiers was basically a stripped down, but otherwise identical version of the the previous "ST" series of amplifiers. In your case, the 2050 is nothing more than a refinement of the ST-40. Since your PEC is in the driver stage of the power amp, I would bet that likely it is nothing more than the ST-40 power amp circuit using the electronic package for economy, versus discrete components as used in the ST-40. Worst case, you could hardly go wrong simply copying the ST-40 circuit in placed of the defective PEC. Good luck with it!

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