Help with HO-10

Murray Leshner multi-volti at SOFTHOUSE.COM
Wed Apr 5 02:05:44 EDT 2000


Hello all:

Someone contacted me today inquiring about the availability of a PEC 84-35
for an AA-22.

I don't have it, and said I would ask around for either the part or any help
the list might have about the internal component values so he could build a
discrete replacement circuit.

If you wish you can reply to Willie directly at one of the CC: addresses
above, but I'd appreciate a cc: so I know he's not in limbo.

Thanks

Murray


-----Original Message-----
From: charles w. morehouse <cwmorehouse at worldnet.att.net>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Wednesday, April 05, 2000 1:59 AM
Subject: Re: Help with HO-10


>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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