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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

Max, I had a problem with my FT-847 in the same way. It was the microphone – an older model 8-pin model with the UP, DOWN, and FAST buttons – but the FAST did not work. When I used the MH-31B8

Well now that the UHF transmit problem was resolved (thank you again to everyone), my next issue is the FAST function does not work from the microphone or by shorting the appropriate pins on the mic

Andrew - You are a wonderful resource to our group! Micky KiXH (Group Admin)

To close the loop on this repair, I ended up removing Q4001 on the VHF/UHF amp board, I removed the 4 connecting pins, and then under jewelers glasses, touched up the 4 pads on the module. I think

Sent: 06 August 2022 21:41 To: Andrew Lenton Subject: Re: Cable as shown is what you need Some of the satellites have SSB uplink on UHF. Whether I use them or not at least I know the radio

Aloes check around the balanced modulator, of the SSB signal PINs 2&5 are interchangeable as it’s is a gilbert cell, Yaesu used it the other way around! Check the filter pins are not corroded

This is the 2nd TX mixer VCO PLL used for SSB and AM, this mixes with the 1st IF SSB to form the 2nd TX IF frequency, before it is mixed up to final frequency by the UHF TX VCO. T1008 has been

Might find this useful Sent: 03 August 2022 09:44 To: [email protected] Subject: Re: [YaesuFT847] No power on SSB Andrew, thanks for the response. AM (and FM) works fine, only on

Audio tracing will not work as the pre amp uses current mirrors, so very little to see, as AM works, the 2nd TX mixer is locked, so check around the SSB filters with a scope for the SSB signal. It

Andrew, thanks for the response. AM (and FM) works fine, only on SSB I got nothing. I just pried open the box and starting doing the audio tracing. 73 de Yono - YD0NXX

I have had this I will get back to you, I presume AM is dead too? Sent: 03 August 2022 02:28 To: [email protected] Subject: [YaesuFT847] No power on SSB I need help as I have no power on

I need help as I have no power on SSB (all bands), whereas FM is fine, whenever I transmit on my FT-847. Receiving SSB signal is fine. I've confirmed this problem on a watt meter to a dummy load. Is

If anyone has an FT847 they are parting out, I am looking for the outer trim piece from the unit. Mine arrived cracked during shipping. Thank you for looking Kent K9EZ

It is for the optional voice board [email protected]> wrote:

I see this connector in the back of the faceplace, it is not connected to anything. What it is function?

Hi As I no longer have an FT847 if anyone gets the chance, can they measure what they get on the following: MD2003 Pin3 MD2004 Pin 3, base of Q2014, collector of Q2014, Base of Q 2022, Collector