I know someone who uses aluminum plates with
HDPE plastic to make a fixed capacitor. Works great
with 1.5kw on Topband. Formulas to get the cap in
reasonably close is in most ARRL RA handbooks. Tweek
with a capacitance meter.
73,
Charlie, N0TT
On Sun, 2 Aug 2015 18:10:57 -0600 Steve Flood
tnx guys! BTW, OpenOffice *will* run the ADIF-to-spreadsheet converter Greg
mentioned.
73, chuck
--
de AB1VL
NAQCC #6799
ab1vl.com
_
Topband Reflector Archives - http://www.contesting.com/_topband
My top-loaded vertical needs a series 260pF capacitor at the feedpoint to
match the 53 + j335 impedance (1.825 MHz) to my coax feed.
I have a few different air-variables I could use, but I was wondering what
sort of fixed capacitors would be suitable in this application.
Max power is 1500w. I
I found NOS Soviet block screw mount micas on ebay that looked like they
would handle QRO and have three pairs in series to cover the band with
shorting relays - all shorted = 1820 then each step (2 short, 1 short,
all open) adds 50KHz. 85' to top, 2x 30' hat and 8 10' elevated 125'
radials.
Hi Steve,
I am shunt feeding my 80 ft tower with a stack on top. I first tried air
variables and the loading changed with power. I went to vacuum variables and
all is well. 500pf @ 7.5kV. 73 Price W0RI
On Sunday, August 2, 2015 7:11 PM, Steve Flood kk...@bresnan.net wrote:
My
