Help with HO-10

[charles w. morehouse]

Hi Sandy,
I doubt that both PEC's would crap at once but if that is true maybe I
can help. Have some new parts for an SB-610. Have:
84-39 1500 cps PEC
84-40 1950 cps
40-76 switch
63-138 switch
The osc circuit is almost identicle except the HO-10 has cathode
follower outputs. These later PEC's should work fine as they look and
the circuit is the same. Have restored several of each and never had a
bad PEC. Luck and 73.
Wayne;
W4GBW
Not to anxious to sell  as might need later but to help a friend...
Could measure and calculate the internal values.

Sandy W5TVW wrote:
>
> I have a very nice monitor scope that I am having trouble with.
> Everything works fine except I cannot obtain a 1 kc or 2 tone
> signal output. The tube (6J11) checks very good. I don't have a
> spare to check with. All underneath looks fine. Any thoughts?
> Thanks, Charles
>
> I'd bet my bottom dollar that the "Couplate" integrated circuits
> are bad.
> These are the things that look like big rectangular ceramic
> capacitors.
> They form the RC networks for the phase-shift oscillators.  They
> can
> be fabricated with individual resistors  and capacitors.  It's
> been
> years since I had the values, perhaps someone one the reflector
> may know what they are.
>
> 73,
> Sandy W5TVW
>
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