Recapping a HQ129-X
 

[missed posting]

From: "BILL" yahoo e-mail block
Sent: Friday, August 27, 2004 2:24 PM
Subject: Recapping a HQ129-X

I just received an old Hammerlund HQ-129-X which was given to me.

I am wondering what is exactly involved in recapping this old radio.

I have never done for an entire radio before, so please be detailed in the
type of capacitors I should use for replacement, where to find them,
etc. Plus any tips.

Thanks, Bill


Bill -

You may wish to "Bookmark" (Netscape) or "Add to Favorites" (Explorer) some
of these web sites with your web browser.

FIRST, start with the manual, which is available on BAMA (you will need DJVU
reader)
ftp://bama.edebris.com/bama/hammarlu...hq129xpdf.djvu

HQ-129-X Spec Sheets (2 pages - takes a bit of time to load)
The schematic on the second page is actually too small for troubleshooting
http://www.hammarlund.info/info/hq-129-x/129-x-1.jpg

http://www.hammarlund.info/info/hq-129-x/129-x-2.jpg

IF you are missing knobs, I believe that Leeds Electronics (NYC) actually
has the crank tuning knob for the HQ-129-X (here is photo)
http://www.leedselect.com/images-odd...rank-metal.JPG

SECOND, take an inventory of the capacitors in your radio (schematic and
inspection).

THIRD, read the various re-capping web sites and references (below)

FOURTH, come back and ask questions before proceeding!

-----------------------------------------------------------
CAPACITOR WEB SITES for reference purposes

Just Radios (Dave and Babylyn Cantelon) - ABCs of Capacitors
http://www.justradios.com/captips.html

http://www.justradios.com/capacitors.html

The Radio Beginner - Replacing capacitors
http://antiqueradio.org/recap.htm

Small radio example of before recapping
http://antiqueradio.org/art/farn03.jpg

and after recapping
http://antiqueradio.org/art/farn04.jpg

Example of a total rebuild of a Hallicrafters S-38, photo documented by John
King
http://www.schmitzhouse.com/Johns_Electronics_08.htm

Antique Electronic Supply - for other parts
http://www.tubesandmore.com/

-----------------------------------------------------------------
REBUILDING CAPACITORS

Electrolytic Capacitors (lots of photos ! )

Early Television restorers
http://www.earlytelevision.org/electrolytic.html

Tim Reese on capacitors
http://www.nmr.mgh.harvard.edu/~reese/electrolytics/

R390A Capacitor rebuild
http://r-390a.us/filter_capacitors.htm

AeroVox - when you want new !
http://www.aerovox.com/

Drake AC-4 Power Supply Electrolytics
http://www.wb4hfn.com/DrakeArticles/...Rebuilding.htm


Rebuilding Paper Capacitors
I only recommended this approach for historical restoration work -
Smithsonian
quality!
http://www.earlytelevision.org/capreplace.html

----------------------------
Hope it helps

g. beat

Don't think that crank knob is for the HQ-129X. It looks like the one
for the BC-348?? Unlike most other Hammarlunds, the 129 has a smooth,
smaller main and bandspead knob. The 120 and BC-779 (et al) have a
smaller fluted knob. Larger knobs came in on the HQ-140. I'll also
add Mouser for the caps. They're a bit cheaper, at times, than Antique.


IF you are missing knobs, I believe that Leeds Electronics (NYC) actually
has the crank tuning knob for the HQ-129-X (here is photo)
http://www.leedselect.com/images-odd...rank-metal.JPG