Hello,
I get 87.4 ohm (identical) on one side and OL on the other. Should I replace?
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-------- Original message -------- From: Ryan Hartnett <ryan@...> Date: 8/22/23 10:43 (GMT-06:00) Subject: Re: [ATU100] Tuning not starting
Hello,
Yes, I've tried applying 10-20w of power without success.
I'll check the diodes when I get home from work and let you know. Thank you for the input.
Ryan KF8IV
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- From: "Immo, DL5KB" <dl5kb@...> Date: 8/22/23 10:19 (GMT-06:00) Subject: Re: [ATU100] Tuning not starting
hi Ryan, sorry, but first the question: do you apply more than 5W HF (CW, AM or FM) to start tuning?? Before changing the diodes, you should make some little measurements with an Ohm-meter to see, if the diodes are indeed diodes... From Anode to GND you should measure abt. 25 ohms, from cathode to GND you should have more than 68k. If not, change them both. There were some issues with the diodes I know. 73, Immo (the starter of this thread is "Kes", M0PKZ. perhaps mail him in direct to get knowing how he solved his problem...., address you find on QRZ-web site)
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Hello,
Yes, I've tried applying 10-20w of power without success.
I'll check the diodes when I get home from work and let you know. Thank you for the input.
Ryan KF8IV
Sent from my Verizon, Samsung Galaxy smartphone
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Show quoted text
-------- Original message -------- From: "Immo, DL5KB" <dl5kb@...> Date: 8/22/23 10:19 (GMT-06:00) Subject: Re: [ATU100] Tuning not starting
hi Ryan, sorry, but first the question: do you apply more than 5W HF (CW, AM or FM) to start tuning?? Before changing the diodes, you should make some little measurements with an Ohm-meter to see, if the diodes are indeed diodes... From Anode to GND you should measure abt. 25 ohms, from cathode to GND you should have more than 68k. If not, change them both. There were some issues with the diodes I know. 73, Immo (the starter of this thread is "Kes", M0PKZ. perhaps mail him in direct to get knowing how he solved his problem...., address you find on QRZ-web site)
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hi Ryan,
sorry, but first the question: do you apply more than 5W HF (CW, AM or FM) to start tuning??
Before changing the diodes, you should make some little measurements with an Ohm-meter to see, if the diodes are indeed diodes...
From Anode to GND you should measure abt. 25 ohms, from cathode to GND you should have more than 68k.
If not, change them both. There were some issues with the diodes I know.
73, Immo
(the starter of this thread is "Kes", M0PKZ. perhaps mail him in direct to get knowing how he solved his problem...., address you find on QRZ-web site)
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Hello,
Thanks for responding. I checked my board and per the schematic and parts listed on it, it states that it has BAT41 diodes installed. They are both matching black diodes on the underside of the board.
Should I change them out anyway?
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-------- Original message -------- From: "Immo, DL5KB" <dl5kb@...> Date: 8/22/23 01:54 (GMT-06:00) Subject: Re: [ATU100] Tuning not starting
hi Ryan, perhaps the diodes at the bridge don‘t work as they should. If possible change them both(!) to BAT41 or equivalent. There were multiple issues with this (search for ?BAT41“ ). Hope, it helps… 73, Immo
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hi Ryan,
perhaps the diodes at the bridge don‘t work as they should. If possible change them both(!) to BAT41 or equivalent. There were multiple issues with this (search for ?BAT41“ ).
Hope, it helps…
73, Immo
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Hello,
I know it's a while ago, but did you ever get your ATU-100 to work? I am having the same issue with mine and looking for any troubleshooting.
Thanks
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ATU-100 tuner not working (build)
Hello,
I built the tuner and purchased a separate case for it. It powers on, but I am not getting any readings other than all zeros (SWR, etc).?
I checked all torroids for continuity and read somewhere else where someone had to scratch the paint off the case to get good grounding. I did that as well without success. I am also powering the unit with 12VDC per the manual.
Any other ideas to help troubleshoot? Any help would be appreciated.
Thanks,
Ryan KF8IV
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Re: where to find software that works for the pickit 3 programmer?
I went through the same problems with a Chinese Clone Pict 2 programmer and Win 7.? I documented how I got it working (message #2111).? Hope this helps.
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Re: ATU-100 Assembly instructions?
Thank you for the tips.
I also suggest this YouTube video ? which explains winding of the toroids and the air inductors, and a way to use a piece of coax on each side of the binocular core.? The inductance part of the video starts around 5:15.
73, Al - va3iaw
On Fri, 18 Aug 2023 at 11:52, Immo, DL5KB < dl5kb@...> wrote: hello Allen,
I see, I'm a little late, but after looking to my built? of ATU100 I want to share some thoughts and tips...
The binocular core gives some challenge to wind by people with only two hands...?
Windings must not overlap! As primary winding I used a piece of RG58, one side of the shield of both parts soldered to ground.
The toroid cores have to be counter clockwise wound to fit to the PCB. The windings spread over 3/4 of circumference.
I hope it helps anyway...
73
Immo
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See this link: The shop is: UP TECH STORE? 73's Carlos Fonseca, CT1GFQSKCC #466T ( )
REP #1406 ( ) GPCW #20 ( ?) NRA #PN-081 () Em sex., 18 de ago. de 2023 às 10:06, Nuno Lopes - CT2IRY via <ct2iry= [email protected]> escreveu:
Olá Carlos, Obrigado pela info, vou tentar a minha sorte ent?o ou na Amazon ou AliExpress.
Thanks Carlos, I'll try my luck from Amazon or AliExpress, and see what arrives.
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Re: ATU-100 Assembly instructions?
hello Allen, I see, I'm a little late, but after looking to my built? of ATU100 I want to share some thoughts and tips...  The binocular core gives some challenge to wind by people with only two hands...? Windings must not overlap! As primary winding I used a piece of RG58, one side of the shield of both parts soldered to ground. The toroid cores have to be counter clockwise wound to fit to the PCB. The windings spread over 3/4 of circumference.  I hope it helps anyway... 73 Immo
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Olá Carlos, Obrigado pela info, vou tentar a minha sorte ent?o ou na Amazon ou AliExpress.
Thanks Carlos, I'll try my luck from Amazon or AliExpress, and see what arrives.
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Comprei o meu no AliExpress, e até agora n?o tenho raz?es de queixa. A quinta, 17/08/2023, 03:48, Nuno Lopes - CT2IRY via <ct2iry= [email protected]> escreveu:
Hi guy's,
Anyone have a good/reliably source to buy an N7DDC 100W tuner?
From what I've read here, most of the sources in Ali, Amazon,etc almost all come with fake toroids, bad relay's, diodes on the bridge, etc...
There is no good source to buy one?
Thanks
Nuno
CT2IRY?
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Hi Dave,? Can you please post the link to the seller. This will be to run with my Hermes Lite 2.
Em quinta, 17 ago, 2023 às 19:53, Dave via groups.io <dvfuller@...> escreveu: Got my ATU-100 on Amazon a week ago and I have done extensive testing. The tuner works very well with the little 45 watt amp. I opened it up and looked inside and it is very well constructed. I am very happy with my purchase.
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Got my ATU-100 on Amazon a week ago and I have done extensive testing. The tuner works very well with the little 45 watt amp. I opened it up and looked inside and it is very well constructed. I am very happy with my purchase.
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Re: ATU-100 Assembly instructions?
Thank you.? I had found the technical description and schematic, but couldn't find an assembly manual.? The YouTube video by va3hdl looks good.
73, Al - va3iaw
On August 17, 2023 10:43:33 a.m. "David Fainitski" <rolin791@...> wrote:
Hi Allen, you can find schematic and manual, but assembly is the simple soldering components to the board.?
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Re: ATU-100 Assembly instructions?
Hi Allen, you can find schematic and manual, but assembly is the simple soldering components to the board.?
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Re: ATU-100 Assembly instructions?
It's on N7DDC's github site:
73 de va3rr
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ATU-100 Assembly instructions?
The ATU-100 kit I bought from AliExpress arrived without assembly instructions.
Can anyone provide me with the assembly instructions or point me to them?? I have searched online in vain.
73, Al - va3iaw
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Hi guy's,
Anyone have a good/reliably source to buy an N7DDC 100W tuner?
From what I've read here, most of the sources in Ali, Amazon,etc almost all come with fake toroids, bad relay's, diodes on the bridge, etc...
There is no good source to buy one?
Thanks
Nuno
CT2IRY?
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Immo, DL5KB
va3rr