[Kenwood] TS830S High Voltage Loss

[Clif Holland]

The 830 has a voltage doubler circuit. One of the filter caps has opened up. 
Measure the voltage across each cap. One will show ~450 and the other almost 
nothing. Guess which is open...

Clif Holland, KA5IPF
www.avvid.com


----- Original Message ----- 
From: "Glenn Haffly" <ghaffly at stic.net>
To: <kenwood at mailman.qth.net>
Sent: Friday, October 22, 2004 11:55 PM
Subject: [Kenwood] TS830S High Voltage Loss


>I have a TS 830S that has lost some HV.
> Power out put is 40 watts. Driver and finals OK.
> In looking at the schematic I have 780 V at the junction of D4 and R5 on 
> the rectifier board.
> It appears D1 - D4 and the resistors R1 - R4 are OK.
> At HV on the rectifier board I have less than 50V. The schematic suggest 
> that HV off the
> board is only going to the HV on the meter. I use to get 800V at the 
> meter.
> Since HV is being pulled down I would think to look at components R5 R6 R7 
> R8 and C1
> on the rectifier board as a start. Any other places to look for a bad cap 
> or diode ?
>
> Tnx , Glenn
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