[amsat-bb] UHF amps

[Zach Leffke]

Hi Jim,

We use Kuhne (DB6NT) products all over the place here at VT.  For the 
Amateur Satellite Service I would recommend this:

https://shop.kuhne-electronic.com/kuhne/en/shop/power-amplifiers/MKU+PA+70CM60W+HY++UHF+MOSFETPower+Amplifier/?card=650

50mW in for 60W out or there about, pretty nice and straightforward 
final stage.  Needs a pretty hefty heat sink, and some control circuitry 
built around it.  If you are looking for something outside the Amateur 
bands, they also have a whole other commercial line of products, many of 
which overlap the ham bands (good for 'dual use', but may require your 
own filtering).


Getting up to 100W or above I second the W6QPL recommendation. He also 
has a lot of useful 'widgets' for rolling your own solutions (like a 
fine sequencer that could be used in conjunction with an SDR to control 
the PA).



-Zach, KJ4QLP

Research Associate
Aerospace Systems Lab
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305

On 11/25/2018 6:29 PM, David J. Schmocker wrote:
> Jim:
> Check website of W6PQL.com or email Jim.. He has lots of great amplifier
> solutions available.  73,
> Dave KJ9I
>
> On 11/25/18, 5:24 PM, "AMSAT-BB on behalf of Jim White"
> <amsat-bb-bounces at amsat.org on behalf of jim at coloradosatellite.com> wrote:
>
>> I'm looking for suggestions on UHF power amps.  One of my stations uses
>> a 10mw output SDR with a 2W gain block after it on TX.  Right now I'm
>> driving the 2W into a MIRAGE D26 to about 35W. I'd like to have about
>> 100W.  As I look at the various amateur power amps I'm not finding
>> anything with 2W in and 100ish out.  I could add some attenuation to the
>> SDR/2W amp string and get the D26 output down to perhaps 20W to drive
>> another power amp but that's not desirable because two amps in series
>> creates a few problems.
>>
>> I can find Minicircuits gain blocks that would get me to perhaps 10W, in
>> place of the 2W gain block, then drive something like a D1010 but those
>> are a bit steep at >$1,000....
>>
>> So any ideas on how to get the SDR 10mw output up to about 100W would be
>> appreciated.
>>
>> Jim
>>
>>
>>
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> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
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