Re: Recent final board price / availability?
Yaesu said they were no longer available as of early September 2024. I ordered a board from a place in Germany called funktechnik.
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Re: multi function encoder
Excellent job Nick,
Glad you got it fixed, good for a few years yet.
Andy
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Re: multi function encoder
I got around to completing this repair today.
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Yaesu sent me a Q9000795 rotary encoder (Alps, appears to be identical to the original one), they also sent me a new knob RA026960B. Total cost including tax and delivery was GBP11.66.
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After removing the front panel , I was able to cut all the tabs off the old encoder, desolder the legs and clean the board. Very delicate operation, I noticed I scratched the coating off the ground track on top of the PCB in a couple of places, also the track below it but they checked OK for continuity.?
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Fitted the new Alps encoder, cleaned the board and re-assembled. The radio has been sat on 40 meters monitoring some CW QSOs for the last couple of hours.
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73
Nick
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Re: Power output instable
Pietro, just for a little more info can you take a picture of the display when this is occurring and post it here?
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Al Skierkiewicz
WB9UVJ
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Re: Recent final board price / availability?
The finals are only one place that you can lose power.?
Drivers, Predriver, transformers, and (on mine) one of the power switch transistors to the predriver supply all can cause low power.
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It is quite easy to check the RF voltages in-out of the p.a against the service manual values.
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Re: Recent final board price / availability?
Yes, and presumably the 'new in box' FT-817 the OP got would have that issue...
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On Sep 14, 2024, at 14:11, Freyja Clark Turner <wa3jpg@...> wrote:
? The self oscillation problem on the original 817 can be dealt with on the older original PA board interface by reversing the phase for the input to it, I've done that to each 817 that has landed in my shack.? At least its worked for me.
Hadassah WA3JPG
Mike,
Besides the normal "transmit into non-resonant/non-existing antenna, blow finals" issue a Z817 can help with, there is the "battery pack drains, the finals self-oscillate and fry themselves" issue.
This issue is a particular concern for FT-817, not for FT-817nd or FT-818 radios.
Congrats on scoring a new in box radio after all these years, good luck! Ken, N2VIP ? I recently got a new in box 817 non ND. I just got the z817 tuner. I sure hope I can protect the finals with this setup. Any protection suggestions?? I don't think the first gen 817 can be repaired easily... IF
Mike WA1MAD I ordered them directly from Yaesu by phone.
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Mike KA2JAI
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Hadassah Freyja Sobel, J.D., Ph.D. Arroyo Grande, CA.
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Re: Recent final board price / availability?
The self oscillation problem on the original 817 can be dealt with on the older original PA board interface by reversing the phase for the input to it, I've done that to each 817 that has landed in my shack.? At least its worked for me.
Hadassah WA3JPG
Mike,
Besides the normal "transmit into non-resonant/non-existing antenna, blow finals" issue a Z817 can help with, there is the "battery pack drains, the finals self-oscillate and fry themselves" issue.
This issue is a particular concern for FT-817, not for FT-817nd or FT-818 radios.
Congrats on scoring a new in box radio after all these years, good luck! Ken, N2VIP ? I recently got a new in box 817 non ND. I just got the z817 tuner. I sure hope I can protect the finals with this setup. Any protection suggestions?? I don't think the first gen 817 can be repaired easily... IF
Mike WA1MAD I ordered them directly from Yaesu by phone.
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Mike KA2JAI
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-- Hadassah Freyja Sobel, J.D., Ph.D. Arroyo Grande, CA.
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Re: Recent final board price / availability?
The original, FT-817 finals used transistors that are no longer available, so technically the rep was correct, BUT...
The FT-818 has a (slightly) redesigned finals board that has a new, readily available set of finals, AND it is backwards compatible with both the FT-817 and FT-817nd.
You should have asked for an FT-818 finals board, and he should have suggested it as a replacement alternative.
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On Sep 14, 2024, at 09:02, Mike Bryce <prosolar@...> wrote:
? Were these FT-818 finals or FT817? When I called a couple of months back, the service guy told me no 817 finals are available and none are planned on being made due to lack of transistors (MOSFETs)
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mike wb8vge
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Re: Recent final board price / availability?
Mike,
Besides the normal "transmit into non-resonant/non-existing antenna, blow finals" issue a Z817 can help with, there is the "battery pack drains, the finals self-oscillate and fry themselves" issue.
This issue is a particular concern for FT-817, not for FT-817nd or FT-818 radios.
Congrats on scoring a new in box radio after all these years, good luck!
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Show quoted text
On Sep 14, 2024, at 08:13, Mike Davis <maddmd818@...> wrote:
? I recently got a new in box 817 non ND. I just got the z817 tuner. I sure hope I can protect the finals with this setup. Any protection suggestions?? I don't think the first gen 817 can be repaired easily... IF
Mike WA1MAD I ordered them directly from Yaesu by phone.
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Mike KA2JAI
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Re: Power output instable
@
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Thanks Al.
That's what I was hoping for. No luck...
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Pietro I2OIM
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Re: Recent final board price / availability?
Were these FT-818 finals or FT817? When I called a couple of months back, the service guy told me no 817 finals are available and none are planned on being made due to lack of transistors (MOSFETs)
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mike wb8vge
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Re: Recent final board price / availability?
I recommend getting the interface cable for it, if you don't have it, so it reduces power during tuning.
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Mike KA2JAI
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Re: Recent final board price / availability?
I bought a finals board for my 817ND from Yaesu UK last month. It arrived in two days.
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Mike G8GYW
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Re: Recent final board price / availability?
I recently got a new in box 817 non ND. I just got the z817 tuner. I sure hope I can protect the finals with this setup. Any protection suggestions?? I don't think the first gen 817 can be repaired easily... IF
Mike WA1MAD
I ordered them directly from Yaesu by phone.
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Mike KA2JAI
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Re: Recent final board price / availability?
I ordered them directly from Yaesu by phone.
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Mike KA2JAI
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Re: Recent final board price / availability?
Who did you order them from? ?
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From: [email protected] <[email protected]> On Behalf Of mmmm via groups.io
Sent: Friday, September 13, 2024 3:51 PM
To: [email protected]
Subject: Re: [ft817] Recent final board price / availability?? I ordered 2 on Aug 7.? I was told I wouldn't be charged until they shipped and to expect Oct delivery.? I received an invoice with a tracking number today.
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Re: Recent final board price / availability?
I ordered 2 on Aug 7.? I was told I wouldn't be charged until they shipped and to expect Oct delivery.? I received an invoice with a tracking number today.
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Mike KA2JAI
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Re: Power output instable
Thanks to both. I'll check the diodes
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I2OIM
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Re: Power output instable
Hi I had a 817ND that 2m tx was not working, I had to replace a diode,
If you look for my post
Dave 2E0DMB
On Thu, 12 Sept 2024, 13:39 Franco Corsi via , <franco.corsi1= [email protected]> wrote: Hi Peter, I had the same problem on the FT817 and I solved it by replacing the Q3003 and Q3005 HSU277 diodes. I hope this helps
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Re: Power output instable
Hi Peter, I had the same problem on the FT817 and I solved it by replacing the Q3003 and Q3005 HSU277 diodes. I hope this helps
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M0RON
Al WB9UVJ
Pietro Molina
Franco Corsi