开云体育

Trace the signal paths, to the TX PA Sent: 12 July 2022 14:17 To: [email protected] Subject: Re: [YaesuFT847] Schematics? Thank you Andrew, will do. RX on the UHF band is fine. It's just

Thank you Andrew, will do. RX on the UHF band is fine. It's just the TX that has failed. Max

Ah That Kingston, not the one 12 miles from me here in Hampshire ! This should help, check the drive and the VCO locking they do drift out of lock 73 Andrew Sent: 12 July 2022

Hi Andy, I touched up the both the PCB and the module solder connections. I may just go in and start inspecting solder contacts to make sure everything is good. Voltages would help but I do have the

Howdo. When you say you resoldered the leads, was that the leads on to PCB, or taking the top off the module and resoldering internally? I had a problem with a VHF PA that turned out to be a bad

Hi Andrew, VHF is fine. I'm in Kingston, Ontario.

Hi I have high resolution schematics where do you live. Does VHF tx work? 73 Andrew Get Outlook for Android

Looking for a good set of schematics with voltage references. My 847 has no output on UHF band, known to me when I purchased it. I'm aware of the issue with the leads on the UHF module losing contact,

Thanks On Sunday, July 10, 2022, 06:21:00 PM AST, Andy Bosworth <sidthepop@...> wrote: I tried this mod with a chinese TCXO. The HF? stability was better, but on VHF transmit I had a

Any external speaker should sound better than the internal speaker. In the old days radios were designed with large speakers pointing forwards towards the users earholes. Nowadays they fit tiny

I tried this mod with a chinese TCXO. The HF stability was better, but on VHF transmit I had a very large buzz with my signal.I tried decoupling, different regulator, everything I could think of. I

Can''t do the mod.

I'm using the Kenwood SP-31. Good idea with the potentiometer. Will give it a try. [email protected]> wrote:

External speaker with a potentiometer inline. I’m actually using an Icom speaker (wash ya mouth out) with a custom vero board. Considerably better sound than the internal speaker. De Spence

Got everything fixed up yesterday even made a few 6m contacts on the A3S! Now I need to build a 6m beam. Up first is the volume control mod, not the resistor one. That is annoying not being able to

Hi Greg, Simple homebrew keying circuit using an optocoupler. One for the PTT and one for CW. I think I've got the CW side solved (was using a mono plug on the 850, but have to use a stereo plug on

The TRS Data jack (vs the DIN one) combines the PTT and audio in (for transmitting) on the Tip of that TRS plug. You need a 2k-ish resistor between the tip and the PTT line, and a DC

Hi Greg How do I specially key from the data jack?

Commanding PTT with the CAT interface takes the audio from the Mike input, not the Data jack. You have to key the rig from the specific port the audio is coming from, or you'll get silence.

Okay, so I am making some progress. CAT is wired and working, and RX audio from the radio is getting to the computer and being decoded. I am still not getting any TX tones from the computer into the