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FT-817 antenna port selectable by memory channel?

Tim Reimers KA4LFP All Messages By This Member #113759 Hi all - Is it possible to configure the 817 to automatically switch antenna ports (front/rear) based on a memory channel? EG, I save the VHF/UHF repeaters I use as channels, with the front port auto-selected, and the HF bands go out the "default" VFO setting of rear port? 73, Tim KA4LFP
Martin Peters #113760 Hi Tim - I think the answer to this is 'No, not based on a memory channel, but it doesn't matter!'. From KA7OEI's FT-817 Pages..."Front and Rear Antenna is selected via menu item #7 and different antenna selections may be made for HF, 6 meters, FM Broadcast, Aircraft band, 2 Meters, and UHF.? By default, HF uses the rear connector and all others use the front." 73 - Martin, G4EFE
Al WB9UVJ Member Profile All Messages By This Member #113761 It is stored by band though. -- Al Skierkiewicz WB9UVJ
Tim Reimers KA4LFP All Messages By This Member #113762 Thanks all!? Sounds like I just need to select the VHF bands and set those, and the HF and set those. Good warning to check a band before i use it too, just to be sure that it's not selected for the wrong band. Honestly, I really don't like the feature and would as soon as happily disable it and manually switch antennas. That's more in line with 40 years of training!? I'd have been just as happy with one port at the back and do something different with the space on the front. It's not THAT much of a problem to have antenna connector on the back, it's not like 99% of the rest of the radios in the world aren't like that!? I can think of many other features I'd rather have had than two antenna ports.? 73, Tim
Al WB9UVJ Member Profile All Messages By This Member #113763 Tim, I have set all bands to be rear on my radio as I have an external antenna switch and a Diamond band splitter.? All UHF/VHF goes out one pipe and everything else goes out the other. -- Al Skierkiewicz WB9UVJ
DD1TA - Thomas All Messages By This Member #113764 Just as a sidenote: the Antennarelay is non-latching. When set to Rear it adds some miliamps to the power consumption. When on battery it reduces operating time.?
John All Messages By This Member #113765 Has anyone here disabled (or removed) the antenna switching relay and permanently connected the output to the rear port? It's something I've considered but never tried. That way you can use the rear antenna port without the extra current drain. 73, John G4EDX toggle quoted message Show quoted text On Thu, 2 Mar 2023 at 05:29, DD1TA - Thomas <thomas.averesch@...> wrote: Just as a sidenote: the Antennarelay is non-latching. When set to Rear it adds some miliamps to the power consumption. When on battery it reduces operating time.? -- John Fletcher
Jeff All Messages By This Member #113766 After many hours of use with the rear connector active, it's not uncommon for the armature on that relay (RL3016) to become sufficiently magnetized to fail closed. Mine did. My production lot has a Panasonic ARK115 (later lots had an Omron G6Y-1).? I think the pinouts are the same.? Both relays have been out of production for a long time, the Panasonic one is unobtanium.? Before I realized that the Omron is still available as NOS online, I opened up the rig and service manual to see what it would take to bypass the relay and permanently connect to the rear connector.?? Long story short, I managed to get the PA/FINAL board out, and didn't think my 70+ year old hands and eyes weren't up to the task, desk magnifier and mini sandbag hand rest notwithstanding. I left it as is, checked for cold joints, checked that test points were within range, and buttoned it up.? I've noticed that a long time off or a sharp enough bump will allow the relay to open and enable the front connector, but only an hour's use of the rear one will be enough reenergize the armature. Hey, it works, and I know what's happening, so that's good enough for now. I do think it's quite possible to remove the relay and jumper to the rear, I just didn't want to go there quite yet.? I think I may yet buy the Omron relay or three.? The same relay is used for RL3001 and RL3017 which are used in the low pass filter circuit.? Failure of these are probably harder to detect, and may account for some other reported problems.? If I get to the point where I want to replace one, I'll replace them all while the rig's apart. Best of luck, jeff kn8a toggle quoted message Show quoted text On Thu, Mar 2, 2023 at 2:28?AM John <easydogxray@...> wrote: Has anyone here disabled (or removed) the antenna switching relay and permanently connected the output to the rear port? It's something I've considered but never tried. That way you can use the rear antenna port without the extra current drain. 73, John G4EDX On Thu, 2 Mar 2023 at 05:29, DD1TA - Thomas <thomas.averesch@...> wrote: Just as a sidenote: the Antennarelay is non-latching. When set to Rear it adds some miliamps to the power consumption. When on battery it reduces operating time.? -- John Fletcher
Jeff WN1MB All Messages By This Member #113767 开云体育 An inherently terrible design flaw. On 3/2/23 00:29, DD1TA - Thomas wrote: toggle quoted message Show quoted text Just as a sidenote: the Antennarelay is non-latching. When set to Rear it adds some miliamps to the power consumption. When on battery it reduces operating time.?

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