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Re: [Amps] HV transformer and Variac

To: "'Steve Wright'" <stevewrightnz@gmail.com>
Subject: Re: [Amps] HV transformer and Variac
From: "Hardy Landskov" <n7rt@cox.net>
Date: Tue, 21 Jul 2015 14:55:24 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Steve,
Don't be surprised if you see large swings in plate voltage. A "pole pig" is
not designed to be run backwards. It wants secondary current to be low and
primary current be very high. I ran one as a kid in California because
that's all I could afford. It worked but I only used it on CW.
73 Hardy N7RT

-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Steve Wright
Sent: Tuesday, July 21, 2015 12:00 PM
To: amps@contesting.com
Subject: Re: [Amps] HV transformer and Variac



On 22/07/15 04:00, amps-request@contesting.com wrote:
> I ask because I have a perfectly fine 'pole pig' transformer rated at 
> 5 KVA.  7200 AC volts on the output (reversed) is a bit much for my 
> needs, so was wondering what the trade-off would be if it were run at 
> considerably less than 220 input.
>
> I can see this is a better xformer for a 4cx10000, than anything I 
> would be using, but I have what I have.
>
Usually the transformer is the difficult part.  You can simply purchase some
tube, so build the easy part around the difficult part.

Buy that big tube. ;)

Steve


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