I seem to recall that RG-58 is rated at 600 watts at frequencies below 30
MHz. This presumes a matched load i.e VSWR at 1:1 which is what should
exist between the amp and the tuner except during "tune up" which should be
done at reduced power.. I'd expect that RG-58 to be OK in as much as the
typical SB-200 will output about 500 to 600 watts.
My personal preference is RG-8 foam or RG-213 for the jumper between the amp
and the tuner.
73
Bob, K4TAX
----- Original Message -----
From: "Vic Rosenthal" <vic@rakefet.com>
To: "Jeff Stewart" <stewgoat@indy.net>
Cc: <amps@contesting.com>
Sent: Wednesday, June 11, 2003 9:54 AM
Subject: Re: [Amps] Coax jumper
> Jeff Stewart wrote:
> > Do I need RG-8 between my SB-200 and antenna tuner or will RG-58
> > handle it. Also I will use a relay box between the solid state radio
> > and the amp to key it. Does this need to be in a sheilded box since
> > it only carries keyong voltage?
>
> RG58 will be fine, but make sure the connectors are installed properly
> (this goes for any type of coax, of course).
>
> As a matter of course I always recommend shielding control circuits and
> using shielded cables to connect them. Under some conditions of RF in
> the shack you might have problems with RF upsetting the transceiver
> control circuitry.
>
> Vic K2VCO
>
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