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I wonder if anyone has ever come up with a command string for the Direwolf startup config file (direwolf.conf) that would put the FT-817 into FM mode for APRS? I recently beat my brains out trying to get the radio to work properly with APRS, not realizing I hadn't switched the radio to FM from DIG mode. It wasn't too obvious because I spent most of my time controlling a Raspberry Pi remotely with VNC. It was actually working, but not well. Dummy? Since I have Hamlib running and a CAT-62 cable it wouldn't seem impossible to send some sort of command (the "08" command string in the radio parlance). I know nothing about Python, but would be willing to learn. I suppose I could start FLrig first and somehow send a command to it as well, I haven't really thought this out yet, but I'll bet someone has. Any ideas? Dennis, K1YPP

Hi, Am enjoying goping through the many informative posts here. Quick question: I created an external power supply using an 8 X AA Tray and 8 1.2V eneloop NiMH batteries. Max power is 5W on FM and SSB with the tray plugged into the external DC input using the Yaseu power cable. I already had the charger and batteries so thought I would try this before looking to buy anything else. My roving sessions are usually only an hour or two at most. Are there any potential issues with this external power supply other than the relatively short life of the batteries - the supplied cable has a fuse. Am thinking of using the supplied rechargeable battery or a spare set of eneloops. cheers Tony

I have been doing some testing with FLDIGI. I bought the unit used, and believe I have the 3 crystal filter set installed. When the node is digital mode it looks like there is a 500 Hz filter centered at 2000 Hz. Using ISB mode I still get 5 watts out, but it looks like there is 3000 bandwidth. Any sense of what is going on? Thanks!

I have a Wolphi-Link that I don't use any more, with cables for FT-817. $30 plus shipping. 73 Dick - KC3EF

I do have a ft-817 with blown finals, I guess they are blown ( not by me ). no output on HF ( milli-watts ) but 10W on VHF/UHF, are really the finals blown ( have the board here ) or other strange things. I thought the finals are complety dead but I tested the radio today and I was wondering why It shows 10W on 2m/70cm and the rest is dead. I looked into the schematics, but find any clue why VHF/UHF is working and HF not.

Yes. correct socket is selected and HF-Meter is suitable for VHF/UHF. Unfortunately no dummy load but the HF transmitted on VHF must be minimum 5 Watts as I reach the repeater 40km away. So the theory of blown PA Finals could be blown away by the wind..that's why I'm asking. Perhaps something in the HF-HSWR protection is blown away (T3003,D3032/D3033) , but I don't have a idea.

Is there any chance or a rumour that there is a successor in development for the FT-817/8 portable like the Icom IC-705 or Xiegu6100? 73' Ron ON2RON

All, I recently picked up a SOTAbeam in-line speech compressor at my local flea market for use with my 817ND. Condition was unknown. I am have some questions as it does not seem to be working. First, in order to get it to pass audio, I have to hook it up in the the opposite manner of how it is marked on the case. In other words, the microphone must be connected to the port marked "RADIO", and the port marked "MIC" must be connect in to the radio. This does not seem correct. I know that the compressor is available as a kit from DX Engineering. Could the builder just have put the sticker on the case in the wrong direction, or does this indicate an issue? Additionally, over-the-air comments have not convinced me that it is working. I have done IN/OUT comparisons, and some ops tell me that the "OUT" (i.e. normal mic) is louder. That's not right. I understand that there is a compression level potentiometer inside the unit. There are no obvious screws holding the compressor together, so it must be a snap-fit. Is it possible to unsnap it without damaging the case ? Lastly, If someone has comments about the effectiveness of this compressor, that would be appreciated. Comparisons to the OBP (One Big Punch) compressor that was sold by W4RT in the past would be interesting as well Thanks in advance for any help 72/73, Gene K!NR

I'm working on an FT-818 for a friend. The locking tab that holds down the ribbon cable on the main board (the one to the display) is missing. I also suspect the ribbon cable is damaged... when I can get the radio to power up, the display flashes on and off. Anyone know of a source for the cable and the locking tab? Thanks and 73, -Josh WU7H

My FT-818, surprisingly, needs a SEL encoder replacement. I've ordered the replacement part Q9000795 (Alps EC11E18244AE) . Looking at the datasheet for the Yaesu encoder, I see that has 18 PPR, with 36 detents, and a reliability rating of 15,000 cycles. I also have a few Bourns PEC11L-4220F-S0015-ND encoders. These are 15 PPR, 30 detent encoders with a reliability rating of 100,000 cycles. Looking at the Alps and Bourns encoders side by side, and looking at the datasheets, these two encoders look physically identical, so they could be a candidate for a swap. I think I'd be willing to go from 18PPR to 15PPR in order to get over 6x the cycle rating on the SEL encoder, as I value relability. Has anyone else tried this?

Started out with the stock Yaesu MH-31A8J dynamic microphone - much fiddling with parameters and testing taking comparison recordings against a remote SDR and subjective QSO reports etc - hopeless ! The MH-31 is designed to make the life of both the QRP broadcaster and the listener miserable. We all enjoy a good joke but this one has gone on too long. Went down the path of putting lipstick on a pig and fitted an in-line compressor module from Sotabeams to the MH-31; that was most effective and got me back in the game but after a while I just didn't want the additional vulnerability/extra hardware to carry and get in the way. Aware of others experiments with electret microphones, I thought about cobbling together a modification myself but noticed TechnoFix have a pre-built replacement condenser mic for the 817. They are a small business I have used before for other cables etc and I have always had good quality & service. Suffice to say that having bought and used the TechnoFix condenser microphone, again testing against SDR recordings and with live QSOs, the MH-31 is now securely back in its box and will never see the light of day in my house again. The Sotabeams compressor, which did perform as advertised on the old dynamic mic, is also now surplus to requirement. The TechnoFix condenser mic will work with the compressor but just on its own it is also perfectly adequate. Link for TechonoFix mic here https://shop.technofix.uk/microphones-and-accessories/microphones/replacement-microphone-for-yaesu-ft-817-ft-818-ft-857-ft-897-ft-900-ft-450 You do lose the stock mic up/down scan buttons and the 'running man' fast button feature but they are not important to me. No affiliations - just spreading the joy :-) 73 B

I use my 817nd as uplinkndriver for my qo-100 Geo satellite uplink. I noticed that my modulation is a bit distorted /rough. As i have a 897 as well and own 3 different Mics. I checked all of them and the problem is present every time so it comes fromnthe 817. As well checked my mod directly listening to the 817 uhf output qrg directly with my ic-705 . Anyone an idea where that can come from ? Many thanks

I picked up a non-ND 817 a while back for one of those "round-tuit" future days.... I predict that 99% of my use of it will be digital modes. Would any of the optional filters make any difference when doing digital modes? If so, which filter(s) would help the most? Thanks! -Farren / KB0AZJ

I was curious about how the SSM worked and so did some testing today. Manual just says display is of activity five channels above and below the current operating channel in the VFO mode. However, it doesn't define what a channel actually is.....and nor did a trawl of Google. What I have discovered is that when operating FM, a single channel (represented by one of the bar graph columns) equates to whatever frequency value you have selected as your FM step [Menu item 30]. So if step is 50kHz the bar graphs cover a range of +/- 250kHz either side of the dial frequency. Struggling a bit to understand what I am seeing in SSB. There is a definite relationship with SSB step [Menu Item 47] but values represented are not as clear to me. With SSB step set to 5kHz a received LSB signal (test TX value matched with RX value set on the 818) visually peaks at the centre of the bar graph tailing off to finish at the fifth bar at either end. Anybody able to explain what scale is actually represented in SSB ? I was sort of expecting the LSB signal to cover about 3kHz to the left of the centre of the display which would be just one bar in this configuration if the same logic as found for FM applied. Brian