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
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@amsat.org on behalf of jim@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
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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+70CM...
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@amsat.org on behalf of jim@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
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
TE Systems 4448G http://tesystems.com/420-450.htm
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of Jim White Sent: Sunday, November 25, 2018 5:25 PM To: AMSAT-BB amsat-bb@amsat.org Subject: [amsat-bb] UHF amps
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
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
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David J. Schmocker -
Gary -
Jim White -
Zach Leffke