What version of the bitx are you using and NO the IRF530 is not a good match from what I have read there is an inbalance in capacitance.? The heat sink is not to be at ground potential it is at Positive Voltage and will short out.
On Tue, May 2, 2017 at 11:17 AM, Johnson
<jv4007@...> wrote:
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
