These APT Mosfets are good for high power amps but not for linear operation.
The only linear amp design with APT mosfets I know of so far is a 6m 300W
amplifier. See application note APT9802 (
http://www.eetkorea.com/ARTICLES/2001APR/2001APR20_AMD_RFD_AN6.PDF ). I have
a collection of other related articles and data sheets at
http://dk9ip.ba-karlsruhe.de/pdf/mosfetpa
So far I have no experience with this type of amplifier. Any hints
concerning a kW broadband linear amp using HV Mosfets are appreciated.
I have build a 100V power supply using 4 Lambda PH300F280 24V/300W DC-DC
converters in series with 300V input (no transformer). These DC-DC
converters can sometimes be found on flee markets. Another manufacturer is
Astec. See http://dk9ip.ba-karlsruhe.de/pdf/dcdc for data sheets and
applications.
73 de Win DK9IP/KH7CD
> As I mentioned in an earlier posting, I've been thinking
> about a 1500 watt HF solid state linear. It turns out
> that I am not alone - several fellow travellers are
> further down the road than I.
>
> While most folks seem to be using 50 volt MRF-150 type
> parts, I've run into two companies that are building
> higher voltage, plastic packaged, RF amps. IxysRF
> makes 150 volt parts, and Advanced Power Technology
> makes 125 volt parts. They are interesting for a
> variety of reasons, but one is that they are much
> cheaper than MRF-150 type parts :-)
>
> Two questions:
>
> 1) Does anyone have experience or opinions about these higher
> voltage parts, e.g. the APT ARF463A/B?
>
> 2) Can anyone point me to info on building a 125 volt or
> 150 volt DC high current power supply? It seems in theory
> that it should be possible to build such a beast without
> a transformer, which might be a major savings in size,
> weight and money.
>
> Thanks!
>
> ***dan, K6IF
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>
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