开云体育

Re: FT-301S transmits AM but not CW or SSB


 

Hi Chuck

at ft-301 block diagram, you can see at IF unit pb 1436 ?that the Q403 (2sk19) amplifier CW and SSB work at TX mode.
Verify it.
I hope to helped.

73
Emerson
PP6EW

Em qui., 24 de jun. de 2021 às 19:41, Chuck K4RGN <K4rgn@...> escreveu:

Hi folks,
?
By its original owner I was given an FT-301S (QRP and analog) that had been?stored indoors in its original box for 20+ years.?The radio is immaculate, inside and out.?The receive side works fine, and so does AM transmit.?That means the RF output stage is ok.?But CW and SSB transmit produces no output on any band.?Looking?at the schematics, this seems?to implicate the IF board, the filter board, or the NB board. Anyone care to guess?where I should start? I have examined all three boards?for leaky electrolytics, etc but I didn't see or smell?anything amiss.?
?
By the way, Earl VE3AB at Netty Electronics has retired.

73 Chuck K4RGN
?

Join [email protected] to automatically receive all group messages.