Author Topic: Pira 5W PLL Transmitter Power  (Read 2608 times)

Radiofreak1041

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Pira 5W PLL Transmitter Power
« on: May 05, 2016, 01:10:48 am »
Hey everyone,

I made the Pira 5W PLL transmitter with a 2SC1971 and double-sided PCB. According to the scheme, I expected a 7W, or at least a 5W RF output power, but I measured only 1W. Is there an explanation for this problem?

Thanks,
Radiofreak1041

carlos manhique

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Re: Pira 5W PLL Transmitter Power
« Reply #1 on: July 03, 2016, 07:06:50 am »
Check power output on BFG135. It should be around  0.3-0.6W. If yes, maybe 2SC1971 is faulty or fake.

radium98

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Re: Pira 5W PLL Transmitter Power
« Reply #2 on: July 06, 2016, 10:51:57 am »
fake c1971 i got some fake :( chinese and not japenese . :-\ :'( >:( :( :o

carlos manhique

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Re: Pira 5W PLL Transmitter Power
« Reply #3 on: July 06, 2016, 07:57:53 pm »
Just try RDHV06F1  instead. Yes I  know it is a  Fet. However, there is an easy way to using it with minor circuit change.