If the 510 gets hot, I'd check for shorts in the coils of the low pass filter or the antenna connector.?
If you are intending to replace the relay, you could pull it out and short the connectors for transmit. If the fault IS the relay, then you would get an output. If you still have low output, then chances are the fault is elsewhere?
73
Dave
G4UFS
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On 1 Jan 2017, at 14:34, Bill Kittilson
bill@... [BITX20] <
BITX20@...> wrote:
?
I can hear the bitx on a near by receiver. ?The coils look fine. The 510 gets hot on transmit. ?I hear the relay but it don't sound quite right. I order the replacement relays. I hope it's the simple. ?Thanks. I'll update you when i get the replacement. ?
Thanks.?
?
Bill,
Check L6 and L7 and see if it is making contact with the solder on the board.
Check the relay K2, I seriously suspect that it could be faulty. Take the output from K2 pin 16 and ground to a (bnc) connector and check the TX out there with a power meter. If there is normal output then relay is suspect.. or not operating. When you
press PTT the relay should click, you should feel that with your finger. I have seen a lot of similar relays fail in my service
experience.
Cood luck and Happy new year!
Raj vu2zap
At 31/12/2016, Bill Kittilson bill@... [BITX20] wrote:
>
>
>I managed to kill my bitx40. It was working great until I decided to tune up the big rig. I can still receive. No power at all on transmit. I replace the 510 transistor. Sill no output. The current does jump up to over 1 amp when I switch to transmit.
>
>Any idea what to look at next?
