[Hammarlund] Re-Capping HQ-180A - Some Questions

[Richard Knoppow]

    Not familiar with the HQ-180-A but on the earlier HQ-120-X 
and 129-X the extra cap is for audio power amp cathode bypass. 
There is a separate lead for it in the earlier receivers. It may 
be that the HQ-180 has an independent cap for this.
     It seems to me that when the 180 was made Hammarlund was 
using all ceramic caps for all but power supply filters, what 
does your receiver have?  If they are ceramics they do not need 
to be changed out unless you find a band one. Hammarlund seems to 
have learned a lesson from the paper caps in the SP-600.

On 7/13/2019 2:33 PM, Steve Reed wrote:
> Hi all -- I've got a HQ-180A here and and started the re-capping process.
> The replacement power supply filter capacitor that I ordered from
> Hayseedhamfest is rated: 65-45-45 (at 450v) and then there's a fourth pin
> on the can rated 45mfd at 50v.  The ACTUAL filter capacitor on my HQ-180A,
> however, is rated 80-40-20 (450v) and there is no fourth pin.  To add to
> the confusion (and just to make it hard for me to trace a lot of this out),
> the only manual I have for a HQ-180A identifies the filter capacitor (C82),
> as a 60-40-40-40 at 450v.  So this is wandering all over the place.  So, a
> couple of questions:
> 1 - Is that Hayseedhamfest cap a direct replacement regardless of the
> difference in the ratings?
> 2 - Does anyone have a schematic for the version of the HQ-180A I have?  I
> realize there were many different production versions.
> 
> Thanks - Steve, KW4H

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL