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complaint of PCB

 

I cannot use my bitx for transmission. while pressing PTT the connection wire to IRF 510 burns. I think a short connection somewhere, but we couldn't identify it. Reception is OK. we have changed the Mosfet. IRF 510 is not available so we used IRF530. we tried for months on it. But cannot locate the short connection. I think it may be a problem of PCB. Think somebody would help me


With regards

VU3LWT
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