[Boatanchors] PROBLEM

[Carl]

It sounds like you have a bunch of bad ELNA electrolytic caps throughout the 
PS. Ive 4 TS-830's ( 3 drive VHF to microwave transverters, the other is for 
testing and repairing amps) and when one cap goes the rest soon follow. 
There are 2 in the HV, several more in the lower voltages for the finals and 
12BY7, and also the bias.

Service Manual can be downloaded from Kenwood.

The first time it happened I had a similar output and was wondering why it 
kept eating tubes as it started months before at say 80W, then 60, then 30. 
The HV checked fine in standby at 890V but was 440 under load. The bottom 
cap was actually open! Couldnt get any reading on the TC-6A cap tester. The 
other caps all had serious leakage and the bias supply was dragged down do 
low he 6146's were almost in Class A. The tubes were all fine.

Carl
KM1H


----- Original Message ----- 
From: "Mr. and Mrs. Magoo" <magoo at isp.ca>
To: <boatanchors at mailman.qth.net>
Sent: Friday, December 31, 2010 11:54 AM
Subject: [Boatanchors] PROBLEM


>I have a TS-830S from a friend....low output (30-40 watts) but 250ma plate
> current.  Good tubes, relay cleaned and contacts re-set, checked driver
> coupling cap etc...done all the usuals.  Voltages check out pretty well.
> Anyone been there, done that?
>
> On CW it idles at 60ma as it does on SSB...is this normal for this rig?  I
> don't have an op manual but I thought the tubes were completely cut off on
> CW.
>
> Bill
>
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