Thread: Home brew TRF
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Old 2nd Nov 2005, 1:42 pm   #2
Ed_Dinning
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Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,172
Default Re: Home brew TRF

Hi Lee, you surmise correctly. A 1N4001 is only rated at about 100V PIV, you really need a 1n4006 or 7, which has a more suitable PIV. You can find the data sheets via Google. It would be good practice to fit a fuse in the 0V lead from the transformer, 100mA or so should be fine. This will protect the transformer and capacitors if you have any further problems.
If you have a 270 volt output this will peak to root2 times as much (382V), and as there are 2 windings in anti-phase the PIV per diode will be twice that, 764 volts. Best to use a 1000 v device in this position.
What sort of set is it, or what is the design based on?

Best regards, Ed dinning
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