[Hammarlund] HQ-140XA hum

[Tom NØJMY]

I don't have it in stock but I can get you a replacement. The 140X cap 
runs $27.75 + S&H, the 140XA is a little higher.

73,
Tom NØJMY .   .
Hayseed Hamfest Co.

Multi-section Can Capacitors
for vintage Heathkit, Drake, Halli, Hammy, more...
www.hayseedhamfest.com




Ron Tate wrote:
> Looking for help on a HQ-140-XA.  Before a shotgun approach in
> approaching the hum problem on an HQ-140XA I thought I would throw it
> out to the list.  I'm sure that the hum is caused by C-52 -ABCD: a
> 10/500-20/450-20/450-10/50 VDC.  The 10/50 is used to bypass the
> cathode 360 ohm resistor on the 6V6 audio output tube.  By the way,
> the HQ-140X uses a separate capacitor for the audio cathode bypass.
> 
> Does any know a source for a replacement capacitor?  It doesn't have
> to have the 10/50 VDC.
> 
> By the way, this HQ-140XA has an audio mode that uses a transistor,
> audio transformer, several glass diodes, and tubular capacitors.  It
> ties in to the 6V6 audio output cathode resistor and by-pass cap.  I
> assume this is where the 5 VDC or so is used to power the mod.  The
> mod is extremely well made and mounted.
> 
> Any source for replacement caps or other trouble shooting tips would
> be appreciated, but this looks like the old electrolytic story.  Any
> info on the audio mod would be helpful to document the schematic.
> 
> First posting...great reflector.
> 
> Regard,
> 
> Ron K4AUW since 1954. 
> ______________________________________________________________ 
>