[Boatanchors] KRM Variable Transformer

[David C. Hallam]

The latest happening was this morning.  Yesterday, I was using it on my 
75S-3 receiver.  When I shut down, I turned the variac off with its 
switch.  It has a switch and voltmeter.  I did not turn off the 
receiver.  When I turned the variac on this morning, the fuse blew. I 
don't think the current inrush of the receiver would be that great.  I 
have only 1 fuse left but will try turning on the variac with no load.  
These fuses don't seem to be the easiest to find in my area.

I don't have a milliohm meter.

David
KW4DH

On 7/20/2014 10:56 AM, WA5CAB--- via Boatanchors wrote:
> Is it blowing the fuse at full load or no load?
> If the former, does it blow it at half load?
> If the latter, maybe it's a 400 CPS unit.
> Try hooking a milliohm meter to the output (with the input disconnected
> from the line, of course) and run it slowly up.
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
> In a message dated 07/20/2014 09:40:30 AM Central Daylight Time,
> dhallam at knology.net writes:
>> I have a KRM model ACCE-590VR variable transformer.  The transformer is
>> rated at 110V in; 0-130v out; 0.5 KVA.  It came with a GMA 5A fuse.  It
>> will work for awhile and then blow the fuse.  I've been all over it
>> hunting for possible shorts, resoldered some internal connections,
>> carefully cleaned and checked insulation of the wiper. I can't find any
>> information, manual, etc., about it so I don't know if the 5A fuse is
>> the correct size.  Given the rating of the transformer, it sounds about
>> right.
>>
>> Does anyone know anything about this model or have some suggestions?
>>
>> David
>> KW4DH
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