'Mini' linear

Does anyone know of a low power linear, say 2W in/10W out, for use with a CW 20M QRP rig? A kit would be fine if there is one out there, or home-brew details.

John
EI2HVB
Ireland

 

John -

You are looking for a Mini-Boots style project or kit. There have been earlier offerings / DIY designs for the QRP operator from Doug DeMaw and others.

NorCal QRP Club featured such a design in their Fall 2000 QRPp journal.
http://www.amqrp.org/kits/miniboots/miniboot

The Best QRP Amp in the World
The DL-QRP-PABy David White, WN5Y
http://www.amateurradioreceivers.net/the_DL_QRP_PA.doc

HF Packer, version 4
http://site.hfprojectsyahoo.com/hf_packer-amp

SDR 5 watt amplifier
http://www.hfprojectsyahoo.com/sla5wamp.html

KD1JV -- DIY 25 Watt RF amplifier for 80 meters
http://kd1jv.qrpradio.com/ssbrig2/SSB2.HTM

TxTopper Full QRP Gallon Amplifier
http://w5usj.com/TxTopperQRPAmp.html

KD7REM -- DIY
http://www.qsl.net/kd7rem/5wpa.htm

 

http://www.ramseyelectronics.com model qamp20c 1-2 watts in 30 out $45

Joe

 

QST had a low power amplifier for QRP rigs as one of their projects, they had four or five of the designs published, the cheapest one was under $50 the most expensive was a two or three bander with a case for less than $100 IIRC.

 

Here is the direct link:

 

Or this. 10mW in for 10W out.

http://www.qrpproject.de/UK/qrppa2008.html

Terry VK5TM

 

Thanks everyone for your very helpful info and links. I have now tracked down a Ramsey kit with a supplier in the UK (Waters and Stanton)http://www.wsplc.com/acatalog/Kits_Ramsey.html