i am in need of the connections for the Clark Electronics KB-2 beverage antenna
switch box. There are 3 wing nut connections on the back of the box and I need
to know what the input to each is.
Help would be appreciated. Please email direct to pace...@aol.com
thanks,
larryn7dd
_
Issues of a fixed capacitor as seen in this thread have been a similar
problem for a network two-banding an 160m Inv L over FCP.
k2av.com has a section on this problem how to do 500 with three 170 pf
barrel style HEC caps. The section also has links to HEC reference material
on how to derate
An air variable is exactly what I was thinking, Dave.
My 160m inverted-L tuner uses just two air variables. I padded the HV
variable with a small 100 pf N1500 (or two) doorknob with no problem.
I use those same doorknobs as padders in my HB legal-limit amplifier, but
they do cause the tuning to
"MaxGain Systems has a surplus Jennngs 500pF/20KV cap for about $350"
This is the one being used on my T and no problems at 1.5KW.
73, Ted: W1GL
--- Original message ---
Subject: Re: Topband: de n7dd
From: Paul Christensen
To: topband
Date: Thursday, 09/01/2020 10:25 AM
d
-feeding an antenna. The side walls are sturdy and many
models have a gasketed rubber seal that forms around the lid's perimeter.
Paul, W9AC
-Original Message-
From: David Olean
Sent: Thursday, January 9, 2020 4:15 PM
To: Paul Christensen ; 'topband'
Subject: Re: Topband: de
Hello Paul,
I am dealing with the same overheating problem. I need a 475 pf
capacitor to shunt feed my 160 tower. I just happened to have a 500 pf
15 KV doorknob almost the size of my fist. It did work for awhile,
(several years) but now seems to heat up and the VSWR climbs to 2:1.
The unit
> does anyone know of a HV (20KV) capacitor with a value of approximately
500 pf that has a NPO value?
Once you get above about 100pF, NP0 options are very limited. Be mindful of
the RF current magnitude in the application. Small doorknobs can heat and
change in value. In fact, I am dealing
Larry,
It will be hard to find.
You can find HEC HT75 100 or 200 pF, 15 kV with -750 tempco. You could
parallel them to get 500 pF. Alternatively, there are Russian 470 pF, 15 kV,
-1500 tempco caps around.
GL and 73,
George,
AA7JV
On Thu, 9 Jan 2020 04:35:12 + (UTC)
Larry via Topband
Larry, I understand most modern doorknobs (e.g. HEC's) at or below 170pF
are NPO. I think 3 170pF's in parallel may work if you truly need NPO.
Matching network or blocking capacitor?
Tim N3QE
On Wed, Jan 8, 2020 at 11:35 PM Larry via Topband
wrote:
> does anyone know of a HV (20KV) capacitor
does anyone know of a HV (20KV) capacitor with a value of approximately 500 pf
that has a NPO value?
thanks in advance.
larry/n7dd
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
hi all,
can anyone tell me if there is common grey line between Kuwait and Tucson,
Arizona?
especially where SR/SS match. if so what dates?
thanks,
larry n7dd
_
Topband Reflector Archives - http://www.contesting.com/_topband
hi bob (DU7ET),
you have done an outstanding job on top band this season. thank you for your
devotion. you have given many a new country on 160.
have a safe voyage and may you have following seas. see you next season.
73, larry n7dd
_
Topband Reflector Archives -
Conditions were awful from Arizona during the contest weekend. two and three
days BEFORE the contest they were excellent to Europe. Guess that "Murphys Law"
was in full effect. Too bad.
The first night only produced a handful of EU and the second night there were
NO EU to be heard.
Look
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