[Amps] Heath SB1000 blowing fuses, fault finding suggestions.

[Carl]

The simplest method is to use your meter and look for shorts, disconnecting 
leads as necessary.

Carl
KM1H



----- Original Message ----- 
From: "Mike & Becca Krzystyniak" <k9mk at flash.net>
To: <amps at contesting.com>
Sent: Thursday, October 07, 2010 9:22 AM
Subject: [Amps] Heath SB1000 blowing fuses, fault finding suggestions.


>
>   I'm working on a SB1000 from an estate that sat idle for maybe a decade,
> and prior to that it had little use.  Last known it was working but now it
> is blowing fuses...
>
>   I have pulled both HV secondary wires off the rectifier board and also
> pulled the wires from LV secondary.  To be safe I also removed the tube 
> but
> the amp still blows the fuses.
>
>   As I am working back to the AC plug it's starting to look like the power
> transformer is shorted in some manner.  But I have never seen one go bad
> before from "sitting idle".  The only other element to isolate is the
> AC-main on-off relay.  So I'm thinking that the problem is either a fault 
> in
> the AC Mains relay when it engages or some fault in the power XFMR.
>
>   Has anyone here chased a similar problem before?  Is there a simple way
> to confirm one or the other?
>
>   Thanks in advance for your thoughts and comments.
>
> 73's  Mike K9MK
>
>
>
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps