[Amps] 811H pops fuses

[Carl]

Unsolder one of the HV AC leads to the PC board and try it.
Keep isolating things one step at a time and with the tubes removed.

Carl
KM1H


----- Original Message ----- 
From: "Tom Osborne" <w7why at frontier.com>
To: "Amps" <amps at contesting.com>
Sent: Saturday, January 18, 2014 5:44 PM
Subject: [Amps] 811H pops fuses


> HI All
>
> I have an AL-811H that I've had for about a month.  It has been working OK
> until last night.
>
> I was making a contact and all of a sudden, it started chattering and blew 
> a
> fuse.  This morning I took the cover off and pulled the tubes.  I turned 
> it
> on and it started chattering again and blew another fuse.  It blows the 
> one
> closest to the side of the amp (left side fuse if looking at it from the
> back).
>
> I checked the meter diode and it's OK.  Checked all 4 tubes and the grids 
> are grounded directly to ground.
>
> I checked the diodes in the HV string and they seem OK.
>
> Any suggestions where to go next? Thanks and 73
> Yom W7WHY
>
>
>
>
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