[sdiy] Genital Electric P/V converter LIVES

[Tim Ressel]

Way to go Harry!  Woo Hoo!  You da man!

Just one thing: What the hell is a GE-101 PV
converter?

--TimR

--- Harry Bissell Jr <harrybissell at prodigy.net> wrote:

> My Gentle Electric GE-101 PV converter has come
> back from the grave. I bought it "as is but in good
> shape" from someone on AH. It was blown to kingdom
> come, probably from reverse voltage on the power
> supplies. I paid way too much for it in the
> condition
> received (but hey, it was 'as-is' right ???)
> 
> My first clues to an amateur repair attempt was that
> ALL THE ELECTROLYTIC caps were replaced, cheap
> sockets
> were inserted for all the opamps (also replaced).
> 
> another clue. One IC had the non inverting input
> drilled OFF CENTER to accomodate a guard ring
> (common
> S/H technique).  The person (dis)effecting the
> repair
> put in an IC socket with that pin 'folded under' so
> no
> connection was made. Were they going to hook it up
> later, or did they just bone it ???  I think (from
> the
> mass capacitor destruction) the latter...
> 
> Sad is that the potted modules (2) were blown out...
> the fundamental extractor AND the expo module. Even
> the 2K Q81 tempco was toast. All the cmos chips were
> trashed, as well as a large number of transistors
> and
> diodes.
> 
> Glad is that I was able to reverse engineer the
> modules
> with hammer, chisel, and propane torch.  I just
> found
> the last problem, which was a defective opamp that
> still worked, but maybe had an extrememly LOW input
> impedance due to internal damage.  Replaced it with,
> yup... a 741 and it started working. OK so 741's
> suck... but I'm fresh out of LM301s
> 
> It was a lot of pain to fix this, but I wanted it
> for
> educational purposes. If it HAD worked, would I have
> smashed the potted modules open ???  Probably not.
> How well does it work ?  I'm not sure yet, but it
> does
> the P/V thing as advertised.
> 
> Maybe when its in a box, I should send it to another
> Gentle Electric owner for an A/B test ???   :^P
> 
> Anyway... I just wanted everyone to know there is
> life-after-talking-about-your-manhood on s-diy 
> 
> H^) harry
> 



		
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