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@Spence: well great Idea! I will record a video and upload it to youtube. Then I share the link here... It takes a couple of days since I am in vacation now.

Can I please inject a suggestion..... Make a short video and post it on YouTube as private for those with a link so we can all see the issue. Failing that I will create a guest account on my FTP

When you say "at low audio frequencies", do you mean low frequencies, or low AF Gain on front panel? I think there may be a translation problem. Regards Andy

...as I wrote "also at the speaker jack" It is the same with an external speaker. Yes, I mean regular SSB on hf bands ... 73, Tom Am 17.08.2022 um 22:49 schrieb Andrew Lenton:

Shortwave? Do you mean HF, first try an external speaker. 73 Andrew Remember AM shortwave broadcast station require a wider filter 6 KHz Get Outlook for Android

Hi all, I have noticed on my "new" FT-847 that the receive audio signal on shortwave is distorted at low audio frequencies. I suspect that the TDA2003H has a defect. At the input pin the signal still

Cool Get Outlook for Android

Disregard, got it. [email protected]> wrote:

So the next question is...how do I center the SHIFT control. I'm a little confused by the instructions in the SM. Max

Solved, R6573 was open, jumpered with a 2K and FAST button now works from the mic. Max

I've measured for continuity between the components. No open traces. R6568 is reading good at 100.7K R6571 and R6572 are reading a bit high at 2.8K (SM shows 1K) R6573, in series with the FST line

I've got nothing on pin 4. I shorted it to pin 5 without success. Also tried 10 between pin 2 (5V) and pin 4 without success. I've got it apart now taking a look Max

Some radios have Pin4 connected with Pin2 (+5V). Shorting Pin4 with Pin5 enables FAST. Check on the radio that Pin4 has no voltage, if so take appropriate measures for correct wiring.

I have the MH-1b8 mike on my 847, and the Fast button works as expected. Greg KO6TH William Shadid wrote:

Max, I first ran into this difference years ago when trying to use my MD-1 Desk Microphone with a newly acquired (at the time) FT-920 Transceiver. If you look at the schematic of, for instance,

Thanks Bill, I'll have to trace the lines from the mic jack to the front panel board and try and sort out which is which. Max

Early Yaesu 9-pin connector wiring used two different common lines – so they are not identical but work on most functions, interchangeably. The two different 8-pin microphone designs show up

I do not believe it is a mic issue. I checked the wiring and it is all intact. According to the schematic, shorting pin 4 (FAST) on the mic jack should activate that function. It does not. I also

Ok I will look into this, it will be something silly! 73 Andrew Sent: 09 August 2022 20:59 To: [email protected] Subject: [YaesuFT847] FAST button not working through mic jack Well

I have seen (2) Yaesu microphones not wired correctly for the radios they were attached to. One was simple miswire, the other was not soldered, it had heat-shrink applied to one of the wires