Gary...
Some YouTube videos...
http://www.youtube.com/watch?v=02v58cnb41o&feature=relmfu
http://www.youtube.com/watch?v=-EACUpIhpac
F1JRD also has an article in Dubus
http://www.qsl.net/f1jrd/MRFE6VP61K25H.html
http://www.w6pql.com/1_kw_2m_ldmos_amplifier.htm
jeff, wa1hco
On 07/23/2011 12:24 PM, Gary K9GS wrote:
> Hello Jeff,
>
> Any pictures available of the copper heat spreader, aluminum plate, etc??
>
> On 7/23/2011 10:34 AM, jeff millar wrote:
>> This email describes what I've learned from looking at these modern
>> transistors
>> for the last few months. It seems to me like a fundamental crossover point
>> has
>> been reached. Silicon processing technology has produced rugged VHF/UHF
>> transistors, with reasonable impedance matching for a reasonable cost,
>> especially considering all the other costs associated with an amplifier.
>> These
>> parts will only get better and cheaper as time goes on.
>>
>> Brian, WA1ZMS, brought a dual MRFE6VP61 on 2 meters (2 x 1250W) to the last
>> VHF
>> contest. The parts are $271 each at Digikey...
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