K8MLM@aol.com wrote:
>
> I have a home brew 4-1000 that requires more drive than my transceiver (100
> watts) has to get full power out (it will only get 1000 watts out). The
> plate voltage is too low... about 3,800 volts. The power supply is capable
> of pleanty of current ( about 1.5 amps DC at 3,800 volts continous), but its
> maxed out on voltage. According to the book, the 4-1000 is operating
> correctly... power out for the drive and plate voltage.
>
> My question is this. Can I use a auto transformer to step up the transformer
> input voltage to get a higher DC voltage output.... would like to operate at
> between 4,500-5,000 volts? The auto transformer I have is rated for 240 vac
> in, 0-280 vac out at 28 amps.
>
Yes you increase the primary voltage and it will give you higher
secondary voltage.
The catch is do you think the transformer your using will handle the
extra KVA you will be asking it to handle? If its a big ol mama and you
dont care, go for it. Another way of increaseing the primary voltage is
to but a large filiment transformer secondary in series with primary. It
will boost the 240 line to say +12 volts to 252. The filiment transforer
will have to also handle the KVA rating required. This will give you
another option to look at and take up less space.
cya..Ron W4WA
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