Re: G08_105 deflection board?

Interesting question, Joe. A quick look and me thinks it's possible.

High voltage unit; Appears to be almost identical. They moved the HV
regulator onboard from the daughter board and simplified the 100v
circuit with a TL783. (doesn't mean you'd have to) Some minor changes in
cap and resistor values.

Neck board; Appears identical also.

Tube and yoke; Well, the tube is the same as Amplifone and 6400 but the
yoke is not. Use an Amp tube and splice in the tube socket if it's
different. I would try to use an Amplifone yoke.

Deflection board; Here's the rub.
    The good: Power and low voltage side is identical. Same 45-0-45
transformer. Signal input and error correction through the custom IC is
a matter of some resistor and cap value changes.
    The bad: Deflection amp circuit has been re-engineered. Taking into
consideration the "paddle boards", it's not a totally different circuit.
I believe it to be different enough to make a hack very difficult.
Consider an add on daughter board to replace that part of the circuit
and incorporate the revisions that Electrohome made. The main deflection
transistors are SDT1064.

Did I miss anything? I have a pile of G08's for donors should you wish
to try it out.

Hans O

Joe Magiera wrote:
> Has anyone ever done a comparison of a G08_105 deflection board to a
> regular G08_003 deflection board? Is it something that an _003 could be
> mod-ed to a_105? I’ve never seen a _105 deflection, so I have no idea
> how crazy that could be.
>
>
>
> I know there is something about putting a G08_003 in a Cosmic Chasm, but
> if I could get a G08_105, that would obviously be preferred. Thanks,
>
>
>
> Joe
>
> joemagiera@ameritech.net
>
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Received on Sat Dec 2 12:18:29 2006