At 20:00 27/10/00 -0400, you wrote:
build an amp - use a Motorola Engineering Bulletin. Get the parts and boards
from Communications Concepts in Beavercreek OH (near Dayton).
They have a couple nice boards, toroid kits, chip cap kits for an amp using
a pair of MRF454's. They also have a 28v kit as well as the ability to
parallel MRF454 boards.
I've worked with these transistors but they are a bit of over kill. I also
thought that Motorola was phasing them out!
This is boosted by the fact that they dont include data of them on their
web pages any more
I have uploaded a pdf file of the MRF148A which is a 30W MOSFET
unfortunately it works on 50V. However I would say making a 50V supply is a
trivial task to building the PA.
2 of these in push pull with a slight modification to their cct would work
nicely I think.
Thats the whole spirit of Amateur radio get in there and tinker.
I would recommend making band pass filters for the PA as you will be
generating lots of harmonics!
Cheers
Eric.
-----------------------------------------------------------------
Eric Freund, Engineer.
Oilphase, Schlumberger Oilfield Aust P. L.
23 Brennan Way, Belmont,
Perth, Western Australia, 6104.
Tel : +61 8 9277 2000 Mo: +61 41 331 9396
Fax: +61 8 9277 3222
mailto:freund@...
-----------------------------------------------------------------
