Hello,
If I use a Windcamp 3 Ah battery, I can choose the power among the values LI, LII, LIII and LIII (blinking). If I turn off the windcamp switch and plug in a 9 Ah Bioenno, I can only choose among LI, LII and LIII. Does it mean that with the Bioenno I can only output?2.5 W?
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I finally got the bluetooth CAT device for my 817 and am using Dan Toma’s Pocket TxRx lite after difficulty on an older Android phone. It is a very slick program. Dan gives all sorts of warnings of the potential that the program could damage the radio or radio operating system. He strongly suggests that a backup file be made, just in case the radio file gets damaged, corrupted or whatever. Does anyone know how to make a backup file for the FT817, non ND? I’ll check YouTube and Google again, to see if I can find something. Thanks
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Removal of that +Vcc is the final step the sequencer performs when switching to transmit, and the first signal to be output when switching back to receive.
Chris Cox, N0UK
chrisc@...
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On Jan 6, 2025, at 08:21, Chris Cox, N0UK via groups.io <chrisc@...> wrote:
Definitely does work, Andrew.
I do exactly the same on one of my 10GHz rigs. If I remember correctly, I have a ~1k current limiter resistor in series between the +Vcc and the TxInh pin.
Chris Cox, N0UK
chrisc@...
On Jan 3, 2025, at 06:32, Andrew G0JCC via groups.io <andrewmlancaster@...> wrote:
Hi David.....i'm following up a very old post you made back in 2016. TX inhibit on an FT817. Did you get to the bottom of it? Does it work? It looks like placing 12v on the TX Inhibit pin on the ACC socket prevents RF being transmitted. I am working on the sequencing for my 10Ghz system and a TX Inhibit would be very useful!
Thanks, best wishes ...and Happy New Year
Andrew G0JCC
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Definitely does work, Andrew.
I do exactly the same on one of my 10GHz rigs. If I remember correctly, I have a ~1k current limiter resistor in series between the +Vcc and the TxInh pin.
Chris Cox, N0UK
chrisc@...
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On Jan 3, 2025, at 06:32, Andrew G0JCC via groups.io <andrewmlancaster@...> wrote:
Hi David.....i'm following up a very old post you made back in 2016. TX inhibit on an FT817. Did you get to the bottom of it? Does it work? It looks like placing 12v on the TX Inhibit pin on the ACC socket prevents RF being transmitted. I am working on the sequencing for my 10Ghz system and a TX Inhibit would be very useful!
Thanks, best wishes ...and Happy New Year
Andrew G0JCC
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Hi Andrew,
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I may help here... My radio is FT-817ND and the plan is to use it as an IF rig for a 10 GHz station. Of course, I needed a sequencer and decided to design and make it myself. Using the inhibitor was part of this design. It allows to control the TX of the station by the PTT button of the radio mic. You press PTT, the sequencer can sense it, but no RF goes out of the rig until the sequencer makes the necessary switches. After it does and deems it to be safe, it lets the RF go. All this is possible due to controlling the inhibitor line.
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In my case, I use a 47K resistor to pull the Inhibitor line to the 13.8V point (also available on the same connector). This prevents generating any RF by default. When it is time to transmit, the inhibitor pin is connected to the ground.?
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I did testing using a power meter and it appears to be working pretty well.
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73, Nikolai VE3NKL
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Thanks Dave, mine is an original non ND. I recently bought a new finals board, just in case. If you’ve seen the external display, it’s a nice option, but does add some clunkyness to the compact unit. I’m also waiting for the CAT bluetooth adapter, to see if that’s more to my liking, although I may run into CAT rate issues once again. 73 Mike Davis WA1MAD
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On Jan 5, 2025, at 8:03?AM, David Wilcox K8WPE via groups.io <Djwilcox01@...> wrote:
? In my experience of hearing tales of woe (not personal experience) damage to the FT 817 was caused by trying to use a tuner to an unknown antenna for too long of a time. ?High SWR seems to be the culprit and caused a lot of failures back in the day. ?Yaesu did some protection in the ND model. ?Mine sits there hoping I will use it again someday. It is a fun radio in spite of the many layers of button presses and small difficult to read screen. ?I sent mine to W4RT back in the day and had all the upgrades. ?What a machine when it was all one could buy in a small package covering all bands. ? Be the REASON someone smiles today.
Dave K8WPE On Jan 4, 2025, at 10:40?PM, Michael Davis via groups.io <maddmd818@...> wrote:
? Thanks Keith. The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. I know there have been reported damage, but I don’t know the actual cause. 73 Mike WA1MAD
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In my experience of hearing tales of woe (not personal experience) damage to the FT 817 was caused by trying to use a tuner to an unknown antenna for too long of a time. ?High SWR seems to be the culprit and caused a lot of failures back in the day. ?Yaesu did some protection in the ND model. ?Mine sits there hoping I will use it again someday. It is a fun radio in spite of the many layers of button presses and small difficult to read screen. ?I sent mine to W4RT back in the day and had all the upgrades. ?What a machine when it was all one could buy in a small package covering all bands. ? Be the REASON someone smiles today.
Dave K8WPE
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On Jan 4, 2025, at 10:40?PM, Michael Davis via groups.io <maddmd818@...> wrote:
? Thanks Keith. The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. I know there have been reported damage, but I don’t know the actual cause. 73 Mike WA1MAD
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Mike WA1MAD wrote… The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. In the past, I used an Elecraft T1 auto-tuner and the FT-817 survived that. I recently picked up a manual QRP Z-match tuner with an absorptive bridge, so the radio never sees a match worse than 2:1 while tuning. The radio should be pretty happy with that. -- 73 Keith VE7GDH
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Thanks Keith. The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage. I know there have been reported damage, but I don’t know the actual cause. 73 Mike WA1MAD
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Hi Andy? Sorry I honestly can not remember, sorry? Dave
On Sat, 4 Jan 2025, 11:40 Andrew G0JCC via , <andrewmlancaster= [email protected]> wrote: Hi David.....i'm following up a very old post you made back in 2016.? TX inhibit on an FT817.? Did you get to the bottom of it?? Does it work?? It looks like placing 12v on the TX Inhibit pin on the ACC socket prevents RF being transmitted.? I am working on the sequencing for my 10Ghz system and a TX Inhibit would be very useful!
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Thanks, best wishes ...and Happy New Year
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Andrew G0JCC
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Hi David.....i'm following up a very old post you made back in 2016.? TX inhibit on an FT817.? Did you get to the bottom of it?? Does it work?? It looks like placing 12v on the TX Inhibit pin on the ACC socket prevents RF being transmitted.? I am working on the sequencing for my 10Ghz system and a TX Inhibit would be very useful!
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Thanks, best wishes ...and Happy New Year
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Andrew G0JCC
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If the LDG only uses CAT to set power and uses the analogue band voltage to know band, then CAT could be disconnected? But maybe it uses CAT to read the frequency. I don't know.
As an aside:
I added a bargraph IC to my homemade linear for the 817 to select the relays for the band filters on the o/p of the PA and had pass-through CAT sockets.
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Mike (call sign?) wrote… I'm wondering if I use manual tuning, by keying the radio on packet, AM or CW and not going to lower power, what would be the danger to tune into a mismatch until the tuner matches the rig to antenna? If you use AM for tuning, the carrier is reduced to 1.5 W or less no matter what power level you have the radio set for. It gives you a reduced power signal for tuning without having to press any buttons except the mode button. -- 73 Keith VE7GDH
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Mike, I'm glad you are doing the tuning in low power out of habit. Not sure what you mean about removing the internal connection for CAT. Thanks
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John, thanks.. I'm wondering if I use manual tuning, by keying the radio on packet, AM or CW mode and not going to lower power, what would be the danger to tune into a mismatch until the tuner matches the rig to antenna? I sure don't wat to blow the finals at 5 watts. I know your suggestion, if "it's ok" would not be a guarantee of no damage. I'll read the Z817 instructions again. I was hoping that with the tuner connected between the radio and antenna there just might be some kind of protection.?
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Thanks Eric. I think I understand your reply. Yes, I can change the CAT rate to 4800 in the FT817 menu and the display will work when connected with the mini din cat cable. The Z817 tuner requires a cat rate of 38400 and will not operate at 4800. I'm wondering if I use manual tuning, by keying rhe radio on packet, AM or CW and not going to lower power, what would be the danger to tune into a mismatch until the tuner matches the rig to antenna? I sure don't wat to blow the finals at 5 watts. I know your answer, if "it's ok" would not be a guarantee of no damage.?
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The Elecraft T1 only uses the analogue voltage band data. I made up a splitter cable with 3.5mm jack and TTL RS232 converter to 9 pin serial for CAT (which works with a USB adaptor).
I set the FT817 manually to low power for tuning as I'd want to check SWR safely after tuning. I've done that with every radio forever and even with the FTdx10 & FC40, so after tuning I check SWR at low power.
If the LDG uses the analogue band data then the internal connection for CAT could be removed to have pass-through.
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Unfortunately, the Z817 does use proper CAT commands to set the FT81x to low power transmit when tuning. It's fixed at 38400 baud, so the pass through won't work for the OP.
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You can use the Z817 as a tuner without the CAT cable, i.e. connect the display directly to the radio.?
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Full detail in the Z817 instructions...
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Regards
John G0GCD
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Hi Michael, ? If I’m not mistaken, the tuner only uses the Band Data pin from the radio to tell it what band you’re on (plus Gnd and power, of course). ? The CAT Tx and Rx pins are different pins and, to my knowledge are not used by the tuner at all and are just passed through to the socket on the tuner. ? Therefore, it should not be a problem to change the data rate for the CAT port to 4800 bps. ? 73….Eric VK2VE. ?
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From: [email protected] <[email protected]> On Behalf Of Michael Davis via groups.io
Sent: Tuesday, 31 December 2024 02:56
To: [email protected]
Subject: [ft817] FT817 compatibility? This is kind of a continuation of the display thread/subject. I received the display yesterday. It came with the mini DIN cable and my 817 was able to power it. However, I am using the cat port for the LDG Z817 tuner with radio menu setting at 38400, the new display requires a cat rate of 4800. The LDG tuner has a pass through cat. Not sure how to make both work. Can I just set to the lower rate, 4800 and both will/should work? There is also a RJ45 connection option that I haven’t tried yet. Thanks all
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This is kind of a continuation of the display thread/subject. I received the display yesterday. It came with the mini DIN cable and my 817 was able to power it. However, I am using the cat port for the LDG Z817 tuner with radio menu setting at 38400, the new display requires a cat rate of 4800. The LDG tuner has a pass through cat. Not sure how to make both work. Can I just set to the lower rate, 4800 and both will/should work? There is also a RJ45 connection option that I haven’t tried yet. Thanks all
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Michael Davis
Chris Cox, N0UK
David Wilcox K8WPE
Mike EI9FEB