[hpsdr] Clean RF linear amplifier for <100mW to 100W

[Tim O'Rourke]

I know that that on of groups in Germany is working on a 100W amp, do not remember the input power although I believe it was low as it was designed for SDR applications if I remember. Try Funk Amateur or Qrpproject group and see what turns up.
I have the HFProject Pro amp that takes in 2w and ups it to 100. I have not done much testing but I will throw the SA in line and see how it looks, I built it but not used it since Hercules came along around the time I finished it.
Tim W4YN
-----Original Message-----
>From: Tom Cathey <k1jj at comcast.net>
>Sent: Feb 20, 2011 1:59 PM
>To: hpsdr at lists.openhpsdr.org
>Subject: [hpsdr] Clean RF linear amplifier for <100mW to 100W
>
>***** High Performance Software Defined Radio Discussion List *****
>
> Hi All,
>
>Since getting the basic HPSDR system up and running (with help from the guys
>here) I have been searching and testing many RF linear amplifiers looking
>for one that will amplify <100mW to 100W.   I've tried TMC tube versions, PA
>units from HF transceivers, the CCI amps, etc.  
>
>None have been satisfactory, even in class A1. The CCI kit amps I tested
>(MRF-150 kits) were lacking, perhaps due to core design, I don't know. The
>tube amps did OK, but require tuning.  The particular solid state amps I've
>tested were not clean enough to complement Penny's nice -55db++ 3rd order
>output.
>
>* I am looking for at least -45db third IMD specs with final amplifier
>voltage of greater than 28 volts. (No 13.8 V amplifiers)   I need about 30W
>to drive my tube linear final amp, thus a 100W amp, backed down to 30W for
>cleanliness, would be nice.
>
>
>Can anyone suggest a reasonably priced SS amplifier kit, board or unit that
>is available with these specs?   I'm not looking to reinvent the wheel or do
>R&D here... :-)   There seems to be a void for an amp like this because the
>commercial use of HF is so low.  There was a German ham who talked of a SS
>linear with similar specs, but haven't heard anything since.
>
>* A linear amp like this would be a popular addition to the HPSDR line.  The
>Pennywhistle, being a 13V amplifier, has IMD in the -30's and is only 16W
>out, so I am looking further.
>
>Thanks for any suggestions.
>
>Tom, K1JJ
>
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Tim O'Rourke 
W4YN at ARRL.Net
Low Power Amateur Radio Rocks 
Member of Flying Pigs,ARCI,GQRP,RSGB,ARRL Life Member
NHRA Life Member

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