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Check the DC switching voltages toggle as you change frequency this will give a clue if the logic is switching correctly 73 Andrew Get Outlook for Android

Sounds like you are making progress you will get there, the pin diode mod does bring down the noise very noticeable. You also need a 50 Watt dummy load to go with your srw meter BR Andrew Get Outlook

Bill K2WH-> Hi Bill, I only just discovered the inability to enable the Alaska emergency frequency during a complete functionality check of the radio.? I went thru all the settings to see what was &

Check this section. it shows the cutoff for each frequency you mention and I believe this is where you need to start to conduct some tests.. [image: FT847 unwell on 460+.jpg]

Just chucking this out there but surely the signal passes through the 70cm BPF? If anything in the 70cm BPF has come adrift then the radio will have a broken signal path. Is it possible soon as you go

Many years ago, I had an 847 and the previous owner modded it and it virtually transmitted anywhere. However, I do not think it would go beyond 512 mhz, xmit or receive. Of course, this was year ago

I have further read this, and it makes no sense, it seems you have a corruption, or an illegal settings near the CPU Check this site and let me know what you find:

My goodness this is an interesting fault, how much power do you get at 460MHz and akso6at the lower frequencies it does transmit at? Get Outlook for Android

Hi all, I have a rather strange issue with my '847 that I haven't yet figured out the cause for: It doesn't receive or transmit between 420 MHz and 459..9995 MHz. Background info: I'm 3rd owner of my

Hi Max, So, you're connecting the mike ground pin to the chassis through the connector shell? Chassis ground should be the same as pin 5, no? They're separated now, but I had originally connected the

Hi Greg, Not sure if you have tried this but it has worked for me in the past. Take the mic connector apart and solder a bare 2" or so length of wire to pin 7. Route the other end of the wire back

A quick update... I'm now thinking the problem has nothing to do with C104.? I tried inserting a capacitor in series with the mike line (pin 8 on the round connector), and the problem remains

Hi Andrew, Looking at the schematic (if this is correct: https://www.tinymicros.com/mediawiki/images/9/9e/Yaesu_MH-36_Schematic.pdf), I don't see one. Where would it be? Greg KO6TH Andrew Lenton

Right, pin 8 is mike, and pins 5 & 7 are the grounds. So, leaving pin 5 unconnected seems to have helped a bit, but there's still a hum.? After some troubleshooting on the local repeater, we noticed

Make sure there is a 560 ohm resistor across the mic! BR Andrew Get Outlook for Android

I think you have the mic wired wrong. Pin-8 is the mic input not ground, which would explain the hum. Also, do not tie the mic ground (Pin-7) and the "other" ground (Pin-5) together. They are

Hi folks, I've been using an MH1-B8 microphone for a while (few years), substituting for the rig's original MH-36D which had the disintegrating rubber cord problem.? Following up on recent suggestion

@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. @Andy, I speak about low frequencies (ca.

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