Does anyone know what is exactly inside the "matching network
assembly" part for the R3 vertical antenna? I'm sure it's a couple of
capacitors, but I need to know the values in order to build one for my
R3.

Thanks,
Prentice
N4VBH

If you are referring to the original Cushcraft R3 with its remote control.
There was a motor /capacitor and coil. I did see documentation on the
Internet at one point (not from Cushcraft) a few years ago.

w9gb


"N4VBH" wrote in message
ps.com...
Does anyone know what is exactly inside the "matching network
assembly" part for the R3 vertical antenna? I'm sure it's a couple of
capacitors, but I need to know the values in order to build one for my
R3.

Thanks,
Prentice
N4VBH

Follow-up regarding the Cushcraft R3:

Product review on eham.net
http://www.eham.net/reviews/detail/1690

BAMA has the manual
http://bama.edebris.com/manuals/cushcraft/r3

Photo of R3 capacitor, motor (used for a loop design)
http://www.geocities.com/n0hc/loop



"N4VBH" wrote in message
ps.com...
Does anyone know what is exactly inside the "matching network
assembly" part for the R3 vertical antenna? I'm sure it's a couple of
capacitors, but I need to know the values in order to build one for my
R3.

Thanks,
Prentice
N4VBH

Thanks, w9gb

I have the manual for the R3, and I think the variable capacitor/motor
is OK. The part that needs replacing is a small coupling block
between the actual SO-239 feedpoint and the stubs that go to the
ring. The parts list calls it a matching network assy., so it must
contain some series capacitors, or something. I contacted Cushcraft
with no success...too old of an antenna.

Anyway, I will probably be moving to a GAP antenna. This one has
served an OK life.

Thanks,
N4VBH

On May 31, 11:49 pm, "w9gb" wrote:
Follow-up regarding the Cushcraft R3:

Product review on eham.nethttp://www.eham.net/reviews/detail/1690

BAMA has the manualhttp://bama.edebris.com/manuals/cushcraft/r3

Photo of R3 capacitor, motor (used for a loop design)http://www.geocities.com/n0hc/loop

OK, likely a couple of 47 pF doorknobs (or about 86 ) could be used for
replacement.

gb

"N4VBH" wrote in message
ups.com...
Thanks, w9gb

I have the manual for the R3, and I think the variable capacitor/motor
is OK. The part that needs replacing is a small coupling block
between the actual SO-239 feedpoint and the stubs that go to the
ring. The parts list calls it a matching network assy., so it must
contain some series capacitors, or something. I contacted Cushcraft
with no success...too old of an antenna.

Anyway, I will probably be moving to a GAP antenna. This one has
served an OK life.

Thanks,
N4VBH

On May 31, 11:49 pm, "w9gb" wrote:
Follow-up regarding the Cushcraft R3:

Product review on eham.nethttp://www.eham.net/reviews/detail/1690

BAMA has the manualhttp://bama.edebris.com/manuals/cushcraft/r3

Photo of R3 capacitor, motor (used for a loop
design)http://www.geocities.com/n0hc/loop

per Joe
----------
Hi Tom,

You're in luck. I have one of the largest (if not the most complete)
collections of Cushcraft assembly manuals etc. anywhere.

According to my notes, the lowest capacitor, the one closest to
ground is around 78 pFd and the upper one is around 138 pFd. I'm sure
anything near that value will be sufficient.

73,

Joe, W1JR

"N4VBH" wrote in message
ps.com...
Does anyone know what is exactly inside the "matching network
assembly" part for the R3 vertical antenna? I'm sure it's a couple of
capacitors, but I need to know the values in order to build one for my
R3.

Thanks,
Prentice
N4VBH