1. BITX20@groups.io

Re: ubitx schematic cleanup #ubitx

Jerry Gaffke
 

The QRPlabs 10W PA kit is not a bolt-on solution for the uBitx.
I don't think anybody has posted how to use this with a uBitx.
But doing so would be considerably easier than addressing all the issues
with the uBitx PA if you are going after a flat response from 3 to 30 mhz.

Swapping to the RD15HV FET's on the uBitx might improve power out
on the upper bands some, but hardly seems worth the trouble.
 
Jerry


On Sun, Feb 24, 2019 at 08:26 AM, Jerry Gaffke wrote:
A better bet might be to buy the excellent PA kit from QRP labs:  https://qrp-labs.com/linear.html
Can give a flat 26dB gain from 3 to 30 mhz, 10W out, roughly 200 ohms in and 50 ohms out.
    https://groups.io/g/QRPLabs/message/30760
Note that it uses the $0.50 IRF510's.
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