[Amps] SWR Foldback driving a TL922

[Mike Schatzberg]

If your jumper between the rig and the amp is just a foot or two long, add a
longer jumper, perhaps 15 to 20 feet of RG 8, and retune the amplifier input
coils once again.  See if you do not find that the input SWR drops closer to
1:1.

73,

Mike Schatzberg
WB2AJI
----- Original Message ----- 
From: "Robert Katz" <rob.katz at thelegacycenter.com>
To: <amps at contesting.com>
Sent: Sunday, September 18, 2005 12:52 PM
Subject: [Amps] SWR Foldback driving a TL922


> I'm having problems driving a Kenwood TL922 amp with a TS850, and I'd
> appreciate any help you can offer.  I had no problems driving the
> TL922 using a TS830, but with the 850 I'm getting a high SWR and the
> rig foldbacks it's output power.  I'm assuming that the 830 had no
> problem matching the high SWR because it has a tube final, but the
> 850 isn't as flexible.  I tried adjusting the tuning slugs in the
> TL922 while transmitting the 850 and monitoring the SWR, and I
> managed to lower it a little bit on some bands but not enough to
> fully drive the amp.
>
> Any ideas on how I can get the amp tuned up?  Is there a simple
> procedure I can follow?  I have an antenna analyzer (MFJ 259) and an
> SWR meter, but no other test equipment.
>
> Thanks and 73,
>     Rob, KA1ARB
> -- 
> Rob Katz, Director
> Legacy Center, Inc.
>
> (919) 678-6000 x106
> (919) 678-6015 fax
> rob.katz at TheLegacyCenter.com
> www.TheLegacyCenter.com
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps