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Yaesu FT-710 working with a LDG 200 ProII

 

Yaesu FT-710 working with a LDG 200 ProII
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Do at your own risk, works with my setup. Not ideal, but its a work around until LDG release a interface cable.
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LDG Y-ACC control cable.
The BLACK jack plug of the Y-ACC interface cable is for the? 1/8¡± jack marked "Radio" on the rear of the LDG200ProII.
The RED jack plug is for the REM/ALC socket on the on the rear Yaesu FT-710.
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The LDG200ProII will need an external power source. DC power in (2.5 by 5.5 mm power jack marked "Power", center positive).?
Power requirements: 11 to 15 volts DC at 500mA (750 mA max during tuning)?
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FT-710 menu setting
Press - FUNC - OPERATION SETTING - GENERAL
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TUN/LIN PORT SELECT = LINEAR
TUNER TYPE SELECT = EXT
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Please note, the FT-710 TUNE button will not initiate the tuning cycle.?
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It is recommended you follow the below procedure every time a tune is required.
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Reduce the power of the FT-710 to around 10 watts before you initiate the tuning cycle.
Tuning is initiated by pressing the TUNE button on the LDG200ProII.
If tuning is successful the TX power can now be increased.
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Re: AT-600 Pro II Apparent Heating

 

Hi great news,
Thanks for the update
Thanks Dave?


On Sun, 5 Feb 2023, 19:16 Al Waschka, <awaschka@...> wrote:
I forgot some history that might be confusing readers.? I found a bend in the RG-8X that was heating on the lower bands, replaced the coax and improved the cable routing.? The problem no longer exists on any band other than 10 meters.

Re: AT-600 Pro II Apparent Heating

 

I forgot some history that might be confusing readers.? I found a bend in the RG-8X that was heating on the lower bands, replaced the coax and improved the cable routing.? The problem no longer exists on any band other than 10 meters.
Re: AT-600 Pro II Apparent Heating

 

I have done some more investigating.? The problem only occurs on 10 meters,? The model I constructed for the antenna on Expert MININEC shows that the impedance presented to the tuner should be around 284-j24.? This impedance is predominantly resistive.? I intend to confirm (or deny) this with my NanoVNA.? Should the AT-600 ProII have difficulty feeding a high resistive impedance?
Re: RU-9:1 Unun Burnt up Replacement

 

I've been buying my "un" boxes at the hardware store.? 4"x4"x2" boxes, and you can fit a 240 size ferrite in them easily.? I also use one of those stepped drill bits?from harbor freight to drill the holes for the SO-239.


On Sun, Feb 5, 2023 at 8:01 AM Morgan Bailey <mbaileycrna@...> wrote:
FT200-2 and Teflon coated 14 or 16 ga wire will solve his problem. Putting vent holes in the box will release the heat. They are easily found on EBay or Amazon.

Here is a reference page:?


73 Morgan NJ8M
BS + MS + $2.98 = COFFEE
Real Life Experience = Priceless, says the man who set his back yard on fire with a breadboard tuner loading a 160 meter inverted L with 1000 watts. LOL


On Thu, Feb 2, 2023 at 10:00 PM Kelly K7MHI via <kellykeeton=[email protected]> wrote:
Friend had a little to much FT8 fun, looking to replace or fix, looking for replacement details for the FT114 sized?Toroidal??



thanks kelly

Re: RU-9:1 Unun Burnt up Replacement

 

FT200-2 and Teflon coated 14 or 16 ga wire will solve his problem. Putting vent holes in the box will release the heat. They are easily found on EBay or Amazon.

Here is a reference page:?


73 Morgan NJ8M
BS + MS + $2.98 = COFFEE
Real Life Experience = Priceless, says the man who set his back yard on fire with a breadboard tuner loading a 160 meter inverted L with 1000 watts. LOL


On Thu, Feb 2, 2023 at 10:00 PM Kelly K7MHI via <kellykeeton=[email protected]> wrote:
Friend had a little to much FT8 fun, looking to replace or fix, looking for replacement details for the FT114 sized?Toroidal??



thanks kelly

Re: RU-9:1 Unun Burnt up Replacement

 

Larry

I agree. I used aluminum boxes for my projects. At the 100 watt level I always made KW versions of the transformers.?

This discussion got me to dig out my old Jerry Sevick ¡°Transmission Line Transformers¡± book.?

Bill N7EU
Re: RU-9:1 Unun Burnt up Replacement

 

Putting all of this in a hermetically sealed plastic box isn't helping either...? Try a metal one so it can get rid of the heat.? Glue some heatsinks to it or whatever it takes.? There are better boxes out there.? That plastic box is about the worst thing to use.

On Fri, Feb 3, 2023 at 6:50 PM Doug Person <doug@...> wrote:

Just as an aside, I have a Palomar Engineers 9:1 setup with an inverted L. Five 16' ground radials, up 25' and the rest horizontal. I'm constantly amazed at how well it works. I push 1 KW into it. It is rated for 1.5KW. 1000ProII put sees nothing worse than 2.1:1.
Doug -- K0DXV?

On 2/3/2023 4:06 PM, William Martin via wrote:
Dave,

Yes I think in this case the enameled wire is toasted. I would expect arcing and shorting of the windings.

I think to damage the core you would have to run a lot more power to physically crack the core or damage the ferrites electromagnetic qualities although I am no expert in that aspect.

When I homebrewed my own UNUN or Baluns I used teflon coated silver wire and stacked at least two ferrites to make sure they did not get saturated with RF. Maybe someone more knowledgeable than me can comment.

Bill N7EU

Re: RU-9:1 Unun Burnt up Replacement

Doug Person
 

¿ªÔÆÌåÓý

Just as an aside, I have a Palomar Engineers 9:1 setup with an inverted L. Five 16' ground radials, up 25' and the rest horizontal. I'm constantly amazed at how well it works. I push 1 KW into it. It is rated for 1.5KW. 1000ProII put sees nothing worse than 2.1:1.
Doug -- K0DXV?

On 2/3/2023 4:06 PM, William Martin via groups.io wrote:

Dave,

Yes I think in this case the enameled wire is toasted. I would expect arcing and shorting of the windings.

I think to damage the core you would have to run a lot more power to physically crack the core or damage the ferrites electromagnetic qualities although I am no expert in that aspect.

When I homebrewed my own UNUN or Baluns I used teflon coated silver wire and stacked at least two ferrites to make sure they did not get saturated with RF. Maybe someone more knowledgeable than me can comment.

Bill N7EU

Re: RU-9:1 Unun Burnt up Replacement

 

¿ªÔÆÌåÓý

The core ferrite material is useless ¨C it has a temperature at which its magnetic permeability changes permanently.? You can read about this on the Fair Rite website in a core datasheet.

Cheers

Colin VE3MSC

?

From: [email protected] <[email protected]> On Behalf Of Dave Robinson
Sent: Friday, February 3, 2023 5:13 PM
To: [email protected]
Subject: Re: [ldgelectronics] RU-9:1 Unun Burnt up Replacement

?

Curious... Not too much experience with baluns... When they are like this is there a real necessity for replacement?
What is the failure mode?
windings burnt open or shorting?
Some kind of damage to the ferrite core?
Winding shorting to core?
Or it just looks bad?

I can understand if the burnt enamel coating allows the wire to short to the core which i think could have been eliminated if glass tape were used for insulation.
Re: RU-9:1 Unun Burnt up Replacement

Gary Priest (K8JOK)
 

The curie temp for type 43 ferrite material is 130 deg C. At this temperature the ferrite loses its magnetic properties. Judging from the appearance of that 9:1 it probably reached the curie temp and is toast now. If you have a nanovna and a 450 ohm resistor you could rewind it and check it with the resistive load to know if it was still working. With validation, I would worry the tuner was masking a bad UNUN.

Gary


Sent from Proton Mail for iOS


On Fri, Feb 3, 2023 at 17:06, William Martin via groups.io <cwfingertalker@...> wrote:
Dave,

Yes I think in this case the enameled wire is toasted. I would expect arcing and shorting of the windings.

I think to damage the core you would have to run a lot more power to physically crack the core or damage the ferrites electromagnetic qualities although I am no expert in that aspect.

When I homebrewed my own UNUN or Baluns I used teflon coated silver wire and stacked at least two ferrites to make sure they did not get saturated with RF. Maybe someone more knowledgeable than me can comment.

Bill N7EU

Re: RU-9:1 Unun Burnt up Replacement

 

I always use Teflon sleeving on my window gs. I couldn't tell by looking at the picture if the core had cracked. I assumed that's why you wanted to "repair" it. if it was electrically ok and just looked bad..it probably still works as it's suppose to, unless there is arcing and if that's the case you need to fix the antenna that's causing the trouble and runn tbe power level for that balun. I also agree with the fellow that stacks two cores so it doesn't get as saturated. ...my 2 cents.?

On Feb 3, 2023 2:12 PM, Dave Robinson <kb7gp@...> wrote:
Curious... Not too much experience with baluns... When they are like this is there a real necessity for replacement?
What is the failure mode?
windings burnt open or shorting?
Some kind of damage to the ferrite core?
Winding shorting to core?
Or it just looks bad?

I can understand if the burnt enamel coating allows the wire to short to the core which i think could have been eliminated if glass tape were used for insulation.
Re: RU-9:1 Unun Burnt up Replacement

 

Thanks for input! They wanted to repair it possibly all the memories of QSO and the fun of the day as a trophy or learning to repair. I think another was purchased!

I also agree it would take more juice to cause issues with the mix composition effectiveness but, I was just assisting with confirming the ring mix value.?


yea there is other Baluns I hear ya! I collect them all! never be without a bag of antenna parts!?


73 Kelly k7mhi :)
Re: RU-9:1 Unun Burnt up Replacement

 

Dave,

Yes I think in this case the enameled wire is toasted. I would expect arcing and shorting of the windings.

I think to damage the core you would have to run a lot more power to physically crack the core or damage the ferrites electromagnetic qualities although I am no expert in that aspect.

When I homebrewed my own UNUN or Baluns I used teflon coated silver wire and stacked at least two ferrites to make sure they did not get saturated with RF. Maybe someone more knowledgeable than me can comment.

Bill N7EU
Re: RU-9:1 Unun Burnt up Replacement

 

Curious... Not too much experience with baluns... When they are like this is there a real necessity for replacement?
What is the failure mode?
windings burnt open or shorting?
Some kind of damage to the ferrite core?
Winding shorting to core?
Or it just looks bad?

I can understand if the burnt enamel coating allows the wire to short to the core which i think could have been eliminated if glass tape were used for insulation.
Re: RU-9:1 Unun Burnt up Replacement

 

Kelly

Palomar has kits up to a kilowatt. Might fit in the old box or get a new box from the hardware store. 100 watts FT8 hours at a time requires a heavy duty UNUN.?


Bill N7EU
Re: RU-9:1 Unun Burnt up Replacement

 

thank you :) 73
Re: RU-9:1 Unun Burnt up Replacement

 

Sorry about that ...the ferrite core FT114.

On Feb 2, 2023 10:00 PM, "Kelly K7MHI via groups.io" <kellykeeton@...> wrote:

Earl, what is ¡°them¡± can you confirm a mix / part? Or the sku for that $1.15 item ?


kelly?
Re: RU-9:1 Unun Burnt up Replacement

 

Earl, what is ¡°them¡± can you confirm a mix / part? Or the sku for that $1.15 item ?


kelly?
Re: RU-9:1 Unun Burnt up Replacement

 

digi-key has them for about $1.15


On Feb 2, 2023 8:00 PM, "Kelly K7MHI via groups.io" <kellykeeton@...> wrote:
Friend had a little to much FT8 fun, looking to replace or fix, looking for replacement details for the FT114 sized?Toroidal??



thanks kelly

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