Update on static problem:
Yesterday, I tried both a 6 foot wire and my Ringo Ranger 2-meter antenna
(just the center pin of the PL-259),
and the static is still there, but not as strong as with the hf vertical.
I thought at first that I tracked it down, because I found that the dimmer
switches
On Tue, 1 Feb 2005 09:44:01 -0800 (PST), Jim Candela
[EMAIL PROTECTED] wrote:
snip
Is this noise broadband, or is it concentrated in
frequency, and then showing another concentration at
say 200 Khz away? My VCR when off was this last way,
and the pulse rate would vary just like you said.
So what's the deal with this tin whiskers crisis? Fortune magazine on January
10 carried a report (p. 27) on Tin Whiskers. It seems that the tin in solder
grows microscopic whiskers over time and as component placement gets ever
smaller, scientists are seeing equipment failures from these
Hi Don et al;
It is real. When I was a senior technician for Motorola 2-way radios,15
years ago, we got a bulletin to this effect. One particular radio had a
VCO shield cover very close to the pc board and tin whiskers would grow
from the circuit board to the shield. The cure was to blow out the
I think the problem for electronis can be controlled by applying confomal
coating after assembly.
About 10 years I go I worked with a proces that used nickel particals in
epoxy resin to replace solder. The process did work but was a real mess to
work with. We tried making surface mount PCBs with
I had a Stancor 202 transmitter that utilized a 35T in the final. The manual
also said you could use an 811. That might help.
Mike(y)
W3SLK
- Original Message -
From: Crawfish [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Cc: [EMAIL PROTECTED]
Sent: Wednesday, February 02, 2005 10:38 PM
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