[time-nuts] schematics for a HP117a please
jfor at quik.com
Sun May 2 21:52:17 UTC 2010
Take the top cover off. There is a shield box that may have useful info
stenciled on top (2 - 4 screws) I have a HC manual, but cannot access it
and won't be able to for some time.
> Well, I didn't get a manual with my receiver and I've never had it apart.
> was just assuming that it used standard newvistors. Assuming is always a
> dangerous thing to do.
> Max. K 4 O D S.
> Email: max at maxsmusicplace.com
> Transistor site http://www.funwithtransistors.net
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> ----- Original Message -----
> From: "J. Forster" <jfor at quik.com>
> To: "Discussion of precise time and frequency measurement"
> <time-nuts at febo.com>
> Sent: Sunday, May 02, 2010 2:52 PM
> Subject: Re: [time-nuts] schematics for a HP117a please
>> Hi Max,
>> Are you sure the main unit uses 6CW4s? It's been 20+ years since I last
>> had my unit apart, but I thought the 60 KHz amp in the main chassis used
>> Nuvistors with either grid or plate caps, something I'd never seen
>> I also remember the Nuvistors were numbered something like 7xxx.
>> I don't have the manual to hand at the moment to check. Sorry.
>>> Has the 13CW4s for the loop antenna and 6CW4/6DS4s for the receiver.
>>> Max. K 4 O D S.
>>> Email: max at maxsmusicplace.com
>>> Transistor site http://www.funwithtransistors.net
>>> Vacuum tube site: http://www.funwithtubes.net
>>> Music site: http://www.maxsmusicplace.com
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