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Mayor513
Junior Member
Username: Mayor513

Post Number: 30
Registered: 3-2002
Posted on Sunday, February 05, 2006 - 12:55 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

--Hi, all. I was wondering what the power rating (RMS) of the MRF455 transistor is? I am thinking of purchasing the President Lincoln 10 meter transceiver to use as a continuous beacon. I figure that my power output will be 20 watts or less, fed into a Maco V58 5/8 wave vertical antenna. Just curious if this transistor will handle this power on a continuous basis. Thanks.
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Patzerozero
Senior Member
Username: Patzerozero

Post Number: 2370
Registered: 7-2004


Posted on Sunday, February 05, 2006 - 12:26 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

rf parts rates it at 60 watts PEP, so 15 RMS carrier is probably it. even at 15, it probably needs added heat sinking on the lincoln. there was a 477 mod for the 2510, it barely got 40 PEP, & they rated it for about 7-8 watts RMS carrier, with additional heat sinking.
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Johnbrowning
Member
Username: Johnbrowning

Post Number: 64
Registered: 9-2006
Posted on Monday, November 27, 2006 - 12:28 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

My Lincoln is set up so that if the RF power knob is at the 12 O'Clock position it keys 10-15 watts and swings to about 65 watts. If I turn it all the way down it does 1-4 watts depending onthe metter used and swings to about 10-13 watts If I turn it up full tilt I get 35-40 Watts with it swinging about another 5 watts. These are based on AM mode. SSB I can not recall the output but it was exceding the rated wattage of the MRF455. If you talk on SSB a lot the Motorola transister sound better then the higher output Japanese transistors. They have a warmer sound to them more tube like then 2879 or 2290. They do not have the power though I think the too things might be related.

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