Hi...
I just dug out my 1954 ARRL handbook and here's what I found;
the 35T has a 3G base 5.0 volts at 4 amperes filiment
maximum plate dissapation in watts 50... maximum plate current 150 ma
maximum plate voltage 2,000 volts... maximum grid current 50 ma
It has an amp factor of 39
Other nam
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:
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, February 02, 2005 10:38 PM
Subject: [AMRadio]
Does anyone know what a modern equivalent would be for a 35T or 203A tube be? I
have a 400-watt output transmitter from West Coast 1939 and 1946 Handbooks that
use the 35T( made by Taylor) as a buffer between a 6L6 and two HK254/100TH's,
and the 203A's are push-pull modulators for same.
BTW, @.1" SP the 915 puts out 127 CFM vs. the 914 50 CFM. I checked, it
doesn't blow the tubes out of their sockets (at least @ sea level).
Bob
I just received 2 new in the box Dayton 2C915 230VAC blowers. They fit
nicely and provide a little more air than the 2C914. The 915's have a
rectangular output whereas the 914's a round, like the originals. No big
deal. You remove all that mounting hardware and rubber shock absorber stuff
a
Bill,
We had conductive epoxies back in the 60s. It had silver powder in it. It
was a mess to work with. We used it mostly on space projects.
This latest thing is an epoxy doped with fine nickel particals. When the
parts are assembled under pressure the resin is squezzed out and the nickle
partic
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 t
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
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
On Tue, 1 Feb 2005 09:44:01 -0800 (PST), Jim Candela
<[EMAIL PROTECTED]> wrote:
> 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.
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 fo
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