[Kenwood] Kenwood TS-420S output power

Sat, 27 Dec 2003 18:39:16 -0500

Mike,

Try it into a dummy load before you go any further. The complex load
presented by the tuner and antenna may confuse a sensitive or mal-adjusted
VSWR protection circuit.

Good luck, eric W1EL
----- Original Message ----- 
From: "Michael Schearer" <[email protected]>
To: <[email protected]>
Sent: Saturday, December 27, 2003 6:32 PM
Subject: [Kenwood] Kenwood TS-420S output power

Hello all,

    First let me apologize if this sort of question has already been asked.
I went through the archives first, to see if I could find an answer, but no
luck so far.

I am running a Kenwood TS-430S with a 40m inverted vee and an Astron RS-20A
(16 amps cont./20 int.) power supply.  I also have been using either an
MFJ-941D or E tuner to work other bands.

The problem I am having is output power.  With a properly tuned antenna, and
appropriate mic gain, I cannot get anything about 5-10 watts.  Going to AM
and driving up the carrier won't get me more than 5 watts.  IC reading goes
from zero to about 2 and no higher.

I have been able to get decent signals into other northwestern states (I'm
operating from Washington) as well as some mid-atlantic stuff.  So I am
getting something out there, just not a lot.

Through process of elimination, I have taken the antenna, power supply, and
antenna tuners off my list.  Which leaves, of course, the TS-430S.  My best
guess, based on the symptoms, is that perhaps the final transistor(s) have
gone bad.

Any ideas?

I'm not inclined enough to be able to fix it, if this is the problem.  Any
ideas on where it could be fixed?

Thank you for your assistance.

Mike
N3IYU

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