----- Original Message -----
From: "Roger (sub1)" <sub1@rogerhalstead.com>
To: <amps@contesting.com>
Sent: Friday, June 03, 2011 1:49 PM
Subject: Re: [Amps] Should a blower run after amp shutdown?
> On 6/3/2011 8:25 AM, John G3UUT wrote:
>> Another caution, this time about constant voltage transformers. I had
>> one of these and tried to use it to stabilise the mains to a signal
>> generator to improve drift. It sort of worked but the main problem with
>> it was that it distorted the mains waveform quite badly, sufficiently so
>> that a normal moving coil meter read very inaccurately. I'm not sure if
>> all constant voltage transformers have this problem but some certainly
>> do so if you want to set the filament to a particular voltage make sure
>> you use a true RMS reading meter.
>
> All the ones I have experience with work that way. I think I may still
> have one that is 750VA or maybe 1KVA. Wave form is really ratty which is
> how they control the RMS voltage. We used them on the input to the
> double walled calibration screen room where you'd think a pure sine wave
> would be needed.
>
> 73
>
> Roger (K8RI)
I use a 1KVA SOLA on the 2 PC's in the office when Im on generator power,
all seems to run fine and it handles the sudden dips when inductive loads
kick in. Yeah, the genny is undersized; I cant get the wife convinced to let
me park a 20KW peak military diesel unit next to the house!
Carl
KM1H
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