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[Amps] MRF151G Vs VRF2933

To: "amps@contesting.com" <amps@contesting.com>
Subject: [Amps] MRF151G Vs VRF2933
From: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Sat, 29 Apr 2017 04:57:50 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Richardson shows the VRF2933 running into a short and an open, then back to a 50 ohm load where a pair still put out 1200 watts at 65 volts. The VRF2933 is rated for 300 W carrier at 50% efficiency. HOWEVER, the signal is pulsed at 20% duty cycle. A pair running PP at 65 VDC put out 1200 watts. After shorting and going to an open circuit, they switched back to a 50 ohm load and was still putting out 1200 W. Actually a little more.

They did not perform the same tests on the MRF 151G also rated at 300W RF but about $9.00 less. The 300 W out with the 151G was not pulsed and again was at 50%

Any thoughts?  Any better transistors?


73, Roger (K8RI)


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