[Boatanchors] Hammarlund HQ-129X BFO Components Question?

[Roger Shultz]

Thanks to all who responded and 240 pf seems to be the unanimous choice for
C43. The original owner also saw the post and thinks he still has the cap,
so perhaps it will be confirmed. If not, then 240 pf will be tried.

73, Roger, NJ2R

-----Original Message-----
From: Chuck McGregor [mailto:cbmcg at comcast.net] 
Sent: Thursday, May 05, 2011 3:05 PM
To: Rod Hogg
Cc: 'Roger Shultz'; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Hammarlund HQ-129X BFO Components Question?

Hammarlund used a very similar BFO circuit in the Navy RBG receiver. 
The RBG manual shows that capacitor as 240mmf.  (and the resistor is 50K 
in that circuit, also).

73,
Chuck K7MCG

On 5/5/2011 11:37 AM, Rod Hogg wrote:
> Roger,
> I have both the original Operating Instruction/Manual and the Rider book
>   on the HQ-129X.  Both show that R46 is a 50K, BUT C43 is only listed as
a
> "Silver Mica" part of Z1 BFO Assy.  Not much help there.
>
> Rod
> KØEQH
>
>
> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net
> [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Roger Shultz
> Sent: Wednesday, May 04, 2011 7:23 PM
> To: boatanchors at mailman.qth.net
> Subject: [Boatanchors] Hammarlund HQ-129X BFO Components Question?
>
> I'm reassembling a HQ-129X where the BFO assembly was taken apart by the
> previous owner.
>
> Fortunately the inductor L30, the variable C45 and fixed cap C44 are all
> there and I think I have it figured out where the wires from V9 pins 3 and
4
> attach, however R46 which on the schematic looks to be 3K though the parts
> list reads 50K, and C43 listed only as a silver mica are both missing.
>
> Would anyone have the value of C43 and confirm that R46 is indeed 50K?
>
> Thanks, Roger, NJ2R
>
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