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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Re: Larger/brighter Display option
Is 817 Commander a better option than Pocket RxTx lite? Has anyone tried/used both? Mike Davis WA1MAD
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On Dec 23, 2024, at 12:22?PM, Toby Burnett via groups.io <ruffdog272@...> wrote:
? I've got a Bluetooth cat dongle plugs into 817. Like Jeff, can use 817 commander wireless for screen display and direct entry etc etc. Good for digimodes ptt too. Toby MM0TOB?
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Re: Larger/brighter Display option
Well, when you ask a question on this group, you sure get some very interesting and helpful answers. I now have a CAT cable coming, an older Android phone repurposed with pocket RX TX loaded and awaiting the cable, AND a display on order from Ali Express. All this should keep me busy and confused for awhile. My only concern is that on a YouTube video, the display worked on an 857, and 897 but not the 817. We’ll see. Steve, KB1CHU, a nearby ham, has offered support to see what we will see. I’ve even thought that just maybe, my unused backup automotive camera might work. Thanks to all, for your suggestions.
Mike Davis WA1MAD
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Dears,
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I wish to all of you Happy Holidays and healthy year 2025!
--
73 - Petr, OK1RP
FT-817ND | FT-818ND | FT-857D?
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Re: FT-817 +DSP +new finals FOR SALE
搁别辫辞蝉迟颈苍驳…
Nice clean FT-817 (non D) FOR SALE
Includes:
* Ft-817. (Non D)
* New Final Amplifier board with new factory installed final transistors
* bhi NEDSP106 DSP super clean noise reduction
* Narrow CW filter (500Hz maybe 300Hz can’t remember)
* Collins Mechanical 2.3KHz SSB filter
* MH-31 Microphone with up/down & fast buttons
* Power Pole dc input adapter
* Wire Bail stand
* VHF/UHF Flexible Antenna BNC
* Stubby BNC VHF/UHF Antenna
* FT-817 Pack-It Reference Manual (this is the real bible)
* Nifty Mini-Manual
* Original Leather Case and Shoulder-Strap
Checked out 80 - 10 Meter HF and 2M/440MHz this evening. The 8-step bhi DSP noise reduction really shines with todays QRN.
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Lots of photos available.?
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Asking $825 insured & shipped USPS Priority Mail with tracking.
Postal money order or PayPal please.?
John Arnold, WA6YSY
Contact me off forum: ?johna@...
Will list on our favorite sale site in a couple weeks if no interest
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Re: Larger/brighter Display option
 73 de Matt, DH2LAB
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Re: Larger/brighter Display option
Julio EB4CUV and me designed a nice CAT display for FT817 which looks like an Icom705
Still some units available. But it is intended for V-UHF and microwaves use (along with the proper transverter)
Not for HF and also making exclusive use of the CAT port
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For more details check my QRZ.com page
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73 de Luis
EA5DOM
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Re: Larger/brighter Display option
I also bought a mini din bluetooth CAT device. It works well with RXTX and even with other PC applications. But I encountered a problem: when you turn off the FT-817ND the bluetooth device does not turn off, checked because its blue LED does not turn off, and continues to consume the equipment's battery. If you forget to disconnect it, you may find an irrecoverable battery.
--
Jose - EA7GAH
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Re: Larger/brighter Display option
Thanks Steve, I may not get it, since I keep getting messages that my order needs to be completed, yet another message that it’s o n it’s way. I think it’s a PayPal thing and really has been or is in process of being shipped. I also bought a mini din bluetooth CAT device to transmit to my Android device. I can then use RxTx app or the other one mentioned. I’m obviously totally out of control. My New Years resolution…”do nothing different” Mike Davis WA1MAD
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On Dec 24, 2024, at 10:09?AM, Steve Black KB1CHU via groups.io <kb1chu@...> wrote:
? I ordered one too and will try it. After it comes in We can get together and figure something out. I have both a 857 and 817 radios. dont? open yours till we see if it works as you may be able to return it. Steve kb1chu
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Re: Larger/brighter Display option
I ordered one too and will try it. After it comes in We can get together and figure something out. I have both a 857 and 817 radios. dont? open yours till we see if it works as you may be able to return it. Steve kb1chu
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Re: Larger/brighter Display option
It will hopefully work. The guy on YouTube couldn't get it to work. 857 and 897 worked. I also just ordered a bluetooth CAT device that works with the Android rx/tx app. Obviously, I'm out of control...lol Merry Christmas
Mike WA1MAD
On Dec 23, 2024 12:24 PM, Ken N2VIP <ken@...> wrote: The listings I see for 12864 displays list the three FT-8x7 radios as compatible, not just FT-857 or FT-817...
Ken, N2VIP
> On Dec 23, 2024, at 11:13?AM, Mike Davis via groups.io <maddmd818@...> wrote:
>
> 12864
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Re: Larger/brighter Display option
The listings I see for 12864 displays list the three FT-8x7 radios as compatible, not just FT-857 or FT-817...
Ken, N2VIP
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On Dec 23, 2024, at 11:13?AM, Mike Davis via groups.io <maddmd818@...> wrote:
12864
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Mike EI9FEB
Michael Davis
John, WA6YSY
DH2LAB
Luis Fernandez
Jose L Perez (G)