[hpsdr] Juma

FRANCIS CARCIA carcia at sbcglobal.net
Wed Sep 21 14:56:24 PDT 2011


hi All,
A friend let me use his Juma TX 500 and I find it very nice to operate. I think it is very well designed. I looked up the FET used in the linear and there are no posted IMD specs for the part or the Juma amplifier. An MRF150 is rated at 50 watts output IMD3 -50db with heavy bias. This takes a lot of heat sink to run that high dissipation. I'm hoping to do better than -40 dB IP3 at 200 watts with my modified MRI stuff.
It will be interesting to see the specifications when they are posted. I bet the price will be right up there but so will the quality. frank WA1GFZ
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