Re: Schematics?

Andrew Lenton All Messages By This Member #498 开云体育 Also put an amp meter in series with TPH and 4003 and 4004, that is what it is for, run around 10 Watts and see that to current ?is, at 50 Watts I would expect 10 -12 Amps depending on efficiency! ? 73 ? Andrew ? ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Andy Bosworth Sent: 12 July 2022 16:18 To: [email protected] Subject: Re: [YaesuFT847] Schematics? ? A very quick look at diagram,? you should have? 8 volts tx on UHF, pin 1 of J4007 Yes You should have some voltage, less than 8, on Pin 2 of the module.?Yes You should have 13.8 on pin 3 of the module, and RF out on pin 4. Check with handheld at varying distance/without antenna to see if it is amplifying. Tricky Check what voltages you have on base and collector of final transistor, Q4006. Should be around 0.65 on base SSB tx, and 13.8 on collector. Yes. ? ? ? ? On Tue, 12 Jul 2022 at 16:01, Max Donoghue <ve3tmt@...> wrote: Yes I can hear the UHF signal quite well on my handheld. But no output power shows on the 847's meter. This is probably the pre-drive signal I'm picking up.

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

开云体育