[Boatanchors] Hammarlund SSB filter needed
Fuqua, Bill L
wlfuqu00 at uky.edu
Sun Jul 31 15:01:43 EDT 2011
Now that is a great reminder to all of us that sometimes it is just best to replace and resolder parts and
not spend to much time analyzing the problem. Somewhere you have to decide to just try it and leave it
as a mystery.
thanks for sharing your experience with us\
From: boatanchors-bounces at puck.nether.net [boatanchors-bounces at puck.nether.net] On Behalf Of Glen Zook [gzook at yahoo.com]
Sent: Saturday, July 30, 2011 10:27 AM
To: Boatanchors at puck.nether.net; John Hurst
Subject: Re: [Boatanchors] Hammarlund SSB filter needed
I got to looking at the soldering job on the case of the filter. Methinks the QC inspector was on vacation that week! So, I went ahead and opened the filter. It is a 6-pole and there were 5 passive components on the board along with the crystals. I replaced the 2 capacitors and 3 resistors and then resoldered the circuit board.
The attenuation went from almost 40 dB to about 6 dB and the filter now works fine. I really don't know if the problem was one of the passive components or the soldering. However, less than 50 cents worth of parts and it is now working.
--- On Fri, 7/29/11, John Hurst <hurstjsj at verizon.net> wrote:
Hi Glen. This happened to me on my HX-50 back in 1966 or so. I opened the filter and found one bad crystal. I bypassed the crystal and it seemed to work pretty well (for an HX-50).
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