By having a fairly low Q tank as well as over 1300pf of Load C on 80M it
makes life easy.
I use a LK-500ZC and 76PA and I have no problems moving around on any
part of 160/80/75. Plenty of adjustment range to keep grid current well
below ratings.
I refuse to use a tuner, just adds problems. A 4:1 VSWR on those bands
is meaningless unless you are using hundreds of feet of RG-58.
Carl
KM1H
----- Original Message -----
From: "Pete Smith" <n4zr@contesting.com>
To: <amps@contesting.com>
Sent: Monday, November 17, 2008 8:54 AM
Subject: [Amps] Active Antenna Tuners
> Every phone contest, I am surprised by how well my SB-220 handles
> low-band
> antennas cut for CW, even relatively high in the SSB portions. Even
> with
> SWRs reading well over 3:1, it matches for maximum output with no
> complaints.
>
> Is this a known and particular strength of the SB-220 output circuit,
> or
> are other tube amps similarly forgiving? If so, which ones? Not
> having to
> change antennas for SSB - priceless!
>
> 73, Pete N4ZR
> the World Contest Station Database is back...
> www.conteststations.com
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
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