AT-100 Pro II dropping tune
Hi!
I've a strange problem with the AT-100 PRO II
As you can see in this video
It drop the tune just after the first cw transmission. It tunes perfectly in RTTY then I switch to cw and it drops the tune at the first transmission.
Any idea?
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Re: RC-600 Bias-T short circuit protection ?
Another option would be to put an external? bias Tee in front of the antenna switch connected backwards to pull the DC off of the cable and feed it directly to the power circuits of the RT-600 through an added power jack, or another bias Tee on the switch port feeding the RT-600.? In essence you would be? useing a bias Tee bridge around the antenna switch.
Al K5TAN
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Re: AT-600 ProII dropping tunes
I found the problem.? It was heat related, but it wasn't in the tuner.? The cable feeding the balun was foam core RG-8X.? When I changed from the RT-100 to the AT-600, I just stood the AT-600 on its rear panel which bent the cable too sharply.? Apparently at some frequencies, the current was high creating heat, or perhaps just due to the bend, the cable shorted, experienced voltage breakdown, or changed parameters intermittently.
I discovered this when I tried testing the setup to determine whether the high SWR observed on the 756 meter was caused by the radio, the tuner, or the balun.? I found that the SWR indicated by the radio when the malfunction occurred was mirrored at the tuner, indication that the problem was in the tuner, the balun, or the antenna.? I suspected a voltage breakdown in the balun, which was made with RG-316.? When I went to disconnect the balun, the connector at the balun input from the tuner was warm.? I replaced the cable and removed the balun, replacing them with a coax ferrite choke.? Operation is now stable at all power levels.
As an aside, once tuned I swept the antenna on multiple bands.? Even on bands where the antenna was short, once tuned the VSWR was below 2:1 over most of the band.? I am concerned this is telling me that the system is dominated by resistive losses.? When I do the same thing with my Tarheel mobile antenna, the usable frequency range is very narrow.? Could the additional length of the flagpole (20 ft.) as compared to the short whip make that much difference?
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Re: Interface cable for FT-847 and AT 200 Pro II tuner
Thank you for your concern.? But I’d guess after 20+ years of service doing stuff like that and more with no damage, I’m ? Vy73 - Mike - KD5KC. El Paso, Texas - DM61rt. SOTA W5T-Texas Association Manager. ? not going to quit now. ? ? ?
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From: [email protected] < [email protected]> On Behalf Of Ryan - N7WAA - 3143494 - WREL204 - 2NA283 Sent: Sunday, January 8, 2023 13:40 PM To: [email protected]Subject: Re: [ldgelectronics] Interface cable for FT-847 and AT 200 Pro II tuner ? Please run your data through?? I have a 3.8 dBi 2 meter antenna and at 10w they called for 2.34' in a controlled environment. Your soft tissues might thank you later.? ? ? ? On Sun, Jan 8, 2023 at 07:07 AM, Mike Olbrisch wrote: I actually use this data-cable on the FT-857D for remote tuning.? The tuner is mounted behind the battery.? In the lower-left photo, the upper-right corner, the red push-button is the tuner start button.? I operate mobile differently than most.? I’m a retired disabled combat veteran, Army DOC says I need to keep walking.? On the local 2m and 70cm SSB nets I can do about 3 MPH.? On any HF operation I need to go slower because the big antenna sways more.
? ? ? Vy73? –? Mike? –? KD5KC – WRFF851 –? El Paso – Texas? –? DM61rt.? SOTA W5T-Texas Association Manager. ? The canyons are calling, colorful and deep.? But I have promises to keep. And miles to go still in my Jeep...?? And miles to go still in my Jeep... ?
? ADVENTURE:? The respectful pursuit of trouble.?? An EXIT is really an ENTRANCE to someplace new.? It isn’t an ADVENTURE until something goes wrong! ? ? ? ? [Edited Message Follows] The FT-847 does not have an ACC jack, and the necessary TX-REQ signal is not on any other connector pin;?
so there is no way to interface the FT-847 to the LDG AT-200ProII.
?
Unlike the FT847, the FT-857D has a 3.5mm ACC jack, where the ring (TX-REQ) connects to the LDG _KEY signal (3.5mm TRS TIP),?and the sleeve is common, using the LDG Y-ACC cable.??
?
FYI: On LDG auto-tuners with 3.5mm jack, tip is _KEY,? ring is _START,? and sleeve is GND.?
A description of the _START and _KEY signal operation on the Icom and LDG antenna tuners is on page 6 of
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Re: Interface cable for FT-847 and AT 200 Pro II tuner
Please run your data through??
I have a 3.8 dBi 2 meter antenna and at 10w they called for 2.34' in a controlled environment.
Your soft tissues might thank you later.? ?
?
?
On Sun, Jan 8, 2023 at 07:07 AM, Mike Olbrisch wrote:
I actually use this data-cable on the FT-857D for remote tuning.? The tuner is mounted behind the battery.? In the lower-left photo, the upper-right corner, the red push-button is the tuner start button.? I operate mobile differently than most.? I’m a retired disabled combat veteran, Army DOC says I need to keep walking.? On the local 2m and 70cm SSB nets I can do about 3 MPH.? On any HF operation I need to go slower because the big antenna sways more.
?
?
?
Vy73? –? Mike? –? KD5KC – WRFF851 –? El Paso – Texas? –? DM61rt.?
SOTA W5T-Texas Association Manager.
?
The canyons are calling, colorful and deep.? But I have promises to keep.
And miles to go still in my Jeep...?? And miles to go still in my Jeep...
?
?
ADVENTURE:? The respectful pursuit of trouble.??
An EXIT is really an ENTRANCE to someplace new.?
It isn’t an ADVENTURE until something goes wrong!
?
?
?
?
[Edited Message Follows]
The FT-847 does not have an ACC jack, and the necessary TX-REQ signal is not on any other connector pin;?
so there is no way to interface the FT-847 to the LDG AT-200ProII.
?
Unlike the FT847, the FT-857D has a 3.5mm ACC jack, where the ring (TX-REQ) connects to the LDG _KEY signal (3.5mm TRS TIP),?and the sleeve is common, using the LDG Y-ACC cable.??
?
FYI: On LDG auto-tuners with 3.5mm jack, tip is _KEY,? ring is _START,? and sleeve is GND.?
A description of the _START and _KEY signal operation on the Icom and LDG antenna tuners is on page 6 of
|
Re: Interface cable for FT-847 and AT 200 Pro II tuner
I actually use this data-cable on the FT-857D for remote tuning.? The tuner is mounted behind the battery.? In the lower-left photo, the upper-right corner, the red push-button is the tuner start button.? I operate mobile differently than most.? I’m a retired disabled combat veteran, Army DOC says I need to keep walking.? On the local 2m and 70cm SSB nets I can do about 3 MPH.? On any HF operation I need to go slower because the big antenna sways more.
 ? ? ? Vy73? –? Mike? –? KD5KC – WRFF851 –? El Paso – Texas? –? DM61rt.? SOTA W5T-Texas Association Manager. ? The canyons are calling, colorful and deep.? But I have promises to keep. And miles to go still in my Jeep...?? And miles to go still in my Jeep... ? 
? ADVENTURE:? The respectful pursuit of trouble.?? An EXIT is really an ENTRANCE to someplace new.? It isn’t an ADVENTURE until something goes wrong! ? ? ?
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From: [email protected] < [email protected]> On Behalf Of N0YWB Sent: Saturday, January 7, 2023 16:28 PM To: [email protected]Subject: Re: [ldgelectronics] Interface cable for FT-847 and AT 200 Pro II tuner ? [Edited Message Follows] The FT-847 does not have an ACC jack, and the necessary TX-REQ signal is not on any other connector pin;?
so there is no way to interface the FT-847 to the LDG AT-200ProII.
?
Unlike the FT847, the FT-857D has a 3.5mm ACC jack, where the ring (TX-REQ) connects to the LDG _KEY signal (3.5mm TRS TIP),?and the sleeve is common, using the LDG Y-ACC cable.??
?
FYI: On LDG auto-tuners with 3.5mm jack, tip is _KEY,? ring is _START,? and sleeve is GND.?
A description of the _START and _KEY signal operation on the Icom and LDG antenna tuners is on page 6 of
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Re: Interface cable for FT-847 and AT 200 Pro II tuner
I made an incorrect assumption that the Y-ACC cable plugged into the key jack on the FT-847. The FT-847 cannot interface with the AT-200ProII tuner. See my later reply.
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Re: Interface cable for FT-847 and AT 200 Pro II tuner
The FT-847 does not have an ACC jack, and the necessary TX-REQ signal is not on any other connector pin;?
so there is no way to interface the FT-847 to the LDG AT-200ProII.
?
Unlike the FT847, the FT-857D has a 3.5mm ACC jack, where the ring (TX-REQ) connects to the LDG _KEY signal (3.5mm TRS TIP),?and the sleeve is common, using the LDG Y-ACC cable.??
?
FYI: On LDG auto-tuners with 3.5mm jack, tip is _KEY,? ring is _START,? and sleeve is GND.?
A description of the _START and _KEY signal operation on the Icom and LDG antenna tuners is on page 6 of
|
Re: Interface cable for FT-847 and AT 200 Pro II tuner
Yaesu made the discontinued FC-20 tuner to interface with the 8 pin mini-DIN TUNER jack on the FT-847.?
The FC- seried tuners used the TXD(4) and RXD(5) serial data pins to command tuning operation.?
?
The TUNER button on the FT-847 will not initiate tuning of a connected LDG tuner. There is no connection to the LDG _START signal.? ?
You will need to press the button on the LDG tuner to initiate tuning. The LDG tuner pulls down the connected _KEY signal to the transceiver.?
I do not know if the FT-847 automatically reduces power to 10 watts while tuning to protect the tuner relay contacts.? ??
?
LDG made an IC-108 interface cable for the FT-857, etc.???
But that connects to LDG tuners with the 6 pin mini-DIN jack interface, like the Z-100A.??
?
For LDG tuners with the classic 3.5mm TRS jack, like the Z100Plus and AT-200ProII:?
The LDG Y-ACC cable connects to the Key jack on the FT-847??
?
The LDG Y-ACC cable appears to be a 3.5mm stereo patch cable, except the wiring is NOT straight across.?
The LDG _KEY signal is the 3.5mm tip, which connects to the ring of the FT-847 3.5mm key jack.? ?The sleeve on both is common (GND).?
?
The IC-108 cable powered the AT-200ProII from the 8 pin min-DIN TUNER jack on the FT-857.
Only pins 1(13V) and 3(GND) are used.? ? ?
??
You need to press the button on the tuner to initiate tuning.?
Verify that the FT-847 reduces power to 10 watts while tuning,?
otherwise, manually reduce power before tuning.??
?
The operation of the LDG tuner _START and _KEY signals is described on page 6 of?
?
?
?
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Re: Interface cable for FT-847 and AT 200 Pro II tuner
Yaesu made the discontinued FC-20 tuner to interface with the 8 pin mini-DIN TUNER jack on the FT-847.?
The FC- series tuners used the TXD(4) and RXD(5) serial data pins to command tuning operation.?
?
The TUNER button on the FT-847 will not initiate tuning of a connected LDG tuner. There is no connection to the LDG _START signal.? ?
You will need to press the button on the LDG tuner to initiate tuning. The LDG tuner pulls down the connected _KEY signal to the transceiver,??
but I do not know if the FT-847 automatically reduces power to 10 watts while tuning to protect the tuner relay contacts.??
?
LDG made an IC-108 interface cable for the FT-857, etc.?https://www.ebay.com/itm/283860986040
But that connects to LDG tuners with the 6 pin mini-DIN jack interface, like the Z-100A.??
?
For LDG tuners with the classic 3.5mm TRS jack, like the Z100Plus and AT-200ProII:?
The LDG Y-ACC cable connects to the Key jack on the FT-847?
https://www.cheapham.com/ldg-y-acc-yaesu-interface-cable-closeout/?
?
The LDG Y-ACC cable appears to be a 3.5mm stereo patch cable, except the wiring is NOT straight across.?
The LDG _KEY signal is the 3.5mm tip, which connects to the ring of the FT-847 3.5mm key jack.??The sleeve on both is common (GND).?
?
The IC-108 cable powered the AT-200ProII from the 8 pin min-DIN TUNER jack on the FT-857.??Only pins 1(13V) and 3(GND) are used.? ?
??
You need to press the button on the tuner to initiate tuning.
Verify that the FT-847 reduces power to 10 watts while tuning,?otherwise, manually reduce power before tuning.??
?
The operation of the LDG tuner _START and _KEY signals is described on page 6 of??
?
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Interface cable for FT-847 and AT 200 Pro II tuner
HI, everyone, ? Does anyone know what cable I would need to connect between the FT-847 and the AT-200 Pro II auto tuner? I know there used to be a tuner that was specifically designed for the FT-847 but it’s no longer available. I’m hoping that I can find a cable to make it work with the AT-200 Pro II. ? Thanks and have a great night. ?
Patrick. ? ?
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Re: RC-600 Bias-T short circuit protection ?
Alpha Delta lightning arrestors units pass DC. Have been using one for years w RC-600 without issue. It is between thr “ Bias-T” box and the Tuner box. Outside near antenna. Not all arrestors can do this dc pass thru. Just an fyi
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On Jan 5, 2023, at 4:21 PM, mike z via groups.io <bb1300@...> wrote:
?I fuse my remote tuner controllers, and the bias tee power to rcv antenna preamps? with a 1 amp fast blow fuse.
Also have stayed away from antenna switching schemes and "lightning arrestors" that are not compatable with "power on the coax" schemes.
Mike N3PM
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Re: AT-600 ProII dropping tunes
After killing rig power, I would recommend opening the LDG tuner enclosure to look for hot toroidal coils just after you have a tuning mismatch event...? ? My experience...
I see the same thing on my AT100 ProII operating a G5RV wire antenna on 10m.?? I get perfect auto-tuning 1:1, 1.2:1, etc. across 10m CW and SSB regions on low power (10 watts) and then after ramping up to my full 100 watts on the same pre-tuned frequency - it mis-matches, and re-attempts tuning at full power.? Failure on 10m occurs just above 50 watts output.? Remaining bands 80-12 are fine at 100 watts. ? Opening the tuner, I find the selected toroid coil VERY hot to the touch.? Others in this forum and elsewhere, have suggested that the high coil temperature under load changes the coil's inductance, causing the auto memory-recalled LC tune to fail and overheat. ?
This is actually my second AT100 ProII tuner.? The first tuner failed catastrophically operating on 10m - one toroid overheated, melted part of the board/insulation and filled the shack with acrid smoke.? The tuner was replaced on warranty and, because I usually operate remotely off-site, I rebuilt my entire HF station into a climate-controlled outdoor enclosure.
IF I stay low power on 10m, I find the tuner to work just fine.? Better than previous MFJ auto tuners I have owned (939, etc.).? ??? ?
73,? Steve KE4LC
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AT-600 ProII dropping tunes
I have an AT-600 Pro II mounted at the base of my 20 foot flagpole OCF dipole.? The tuner RF input is connected to the antenna 1 connector (for external tuner use) on my Icom 756 Pro III? About 30' of 4 conductor irrigation cable.which I wired to be an IC-PAC accessory cable (about 15' of which is in an underground conduit to the house with the remainder in the house to the rig) runs from the external tuner connector on the 756 to the tuner power and rig connectors.? At the tuner I have clipped on four split ferrites.? The tuner is grounded with a short braid strap to an 8' ground rod.? The tuner output feeds a single core current 1:1 balun made with RG-317.? The balun output feeds the OCF 20' flagpole with 450 ohm ladder line.
When I pick a frequency and long press the 756 tune button the AT-600 runs a tune which is typically between 1:1 and 1.7:1.? If i operate FT-8 at 50 watts everything is good.? Often on full power SSB operation or CW operation the SWR suddenly rises to full scale on the 756 SWR meter.? At the same time the receive signal and noise levels drop.? I determined this is a power-related failure by tuning in different modes, setting the RF power to 0, switching to FM mode which allows a full power 100 watt carrier output., and then gradually increasing the output power.? Reliably, somewhere around 70 watts or so, the indicated SWR jumps to full scale and the power rollback in the 756 reduces power.? I went out and looked at the tuner and it was still in Antenna 1 and not in bypass. I can then re-do the tune and get an acceptable SWR.
The only things I can think of are the irrigation cable conductors are copper-plated steel, and the cable is not shielded.? I don't think conductor resistance is the problem because the current draw in the tuner should be the same regardless of the transmit power level.? That leaves me with the lack of shielding.
Any other ideas?
Al K5TAN
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Re: RC-600 Bias-T short circuit protection ?
hi all
thanks for everyone response
decided not to do a fast blow fused on power line to bias-t...
best solution for me is to NOT put the bias-t on the radio side of antenna matrix swicth
but
on the antenna side of the switch
so
my final solution is to put the bias-t controller after? the remote antenna matrix switch on just the coax line going to the remote tuner to the 43ft vertical.
and
use a remote control power plug to turn the bias-t controller on and off.
Paul K3SF
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Re: RC-600 Bias-T short circuit protection ?
I fuse my remote tuner controllers, and the bias tee power to rcv antenna preamps? with a 1 amp fast blow fuse.
Also have stayed away from antenna switching schemes and "lightning arrestors" that are not compatable with "power on the coax" schemes.
Mike N3PM
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Re: RC-600 Bias-T short circuit protection ?
Hi Paul,
You can check at files section the RT100 circuit unit (that I assume is the same as the RT600) for remote and the RT600 for tuner unit.
The RF input is isolated from the DC then I understand that the DC never "arrives" to the antenna..
The remote unit to control the tuner has not any shortcut protection and of course it could be damaged for a short cut, but it looks very easy to install a fuse in this line before inject DC to the coax.
Looking the schematic I don't understand why there is not any protecction for this purpose.
I hope I can help you
Regards
ea3fnm
pedro s
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RC-600 Bias-T short circuit protection ?
I recently acquired an RT600 and RC600.
My antenna system includes a remote 2X6 antenna matrix switch (WX0B). This allow me to feed the two inputs to my flex6600m .
and
since all my antennas have DC ground at their feed points ( baluns , and shorting stubs...)
and
i could possible switch a powered up RC600 to one of these antennas and not the intended RT600 -antenna combo ( 43ft vertical)
with this in mind, i need to know if the RC600 has any DC short circuit protection...
in the event i accidentally switch to one of the other antenna
i have not found the actual circuit diagram as the LDG manual only shows a typical bias-t circuit
Thanks
Paul K3SF
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Re: Cable for FTDX10 + Z11-Pro 2
>> Any comments please?
?It’s all about point of control. The TX REQ signal leaves the tuner in control; the tuner simply asks the rig to initiate a tuning cycle, and then releases the line when it’s done so the rig can go back to normal operation. The other arrangement is where the rig is the control point. When the ’Tune’ button on the rig is pressed, it informs the tuner of its intention to tune and then initiates the cycle. In this scenario, the RX D and TX D lines play a critical role; they are serial communications lines (4800 baud I believe), through which the rig and tuner exchange commands and responses.?
?Also, the rig constantly informs the tuner of the dial frequency through these lines, so that if the tuner has a memorized setting for that frequency already, it can switch there preemptively without the need for any tune cycle. Besides the Yaesu and some MFJ tuners, the mAT series of tuners (mAT-30 and mAT-40) also implement this capability. If you have a bunch of memorized tune points and simply tune across the the band in receive mode, you can hear the relays in the tuner clicking as they follow the receive frequency. ?Really slick.
73 -=[ Steve ]=- KE0VDC
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Hi, I have been studying the AT1000 manual and this forum prior to a possible purchase and venture to suggest that the yaesu 8pin tuner ports do not seem to have the ”tx req” needed to allow tuning by pressing tune on the ldg atu, hence why the linear port is used for ldg YACC cables. I will be making up a YACC ?cable for my FTDX3000 using ?a DB15 male plug ( 2 row, ?not “hi density” 3 row) from the Linear port to ldg tuner and using either the transceiver’s Tuner port ?tx gnd ?and gnd to my linear amp or soldering an additional lead to the linear port DB15 plug tx gnd and gnd (and alc if needed) for the linear amp. I do not understand the meaning or function of all the Yaesu Tuner port pins that LDG seem not to use (but that some MFJ units do use that simulate a Yaesu ATU enough to allow tuning by pressing the transceiver’s tune button)? In contrast the LDG tuner’s seem to need the “tx req” connection to tell the transceiver to transmit CW (at the tuning power set in the transceiver menu) when you press tune on the ATU. Any comments please? 73s ?The Y-ACC-2 cable is intended to go into the Linear port on the FXdx10, which is 10 pin. I would think using the same-named pins on the 8-pin tuner port would work, but I haven’t tried. ?If you can find one, the Y-PAC-1200 cable (long discontinued I think) works and also powers the tuner. PA1RAF has a video on YT giving the pinout of this cable.?
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Re: Cable for FTDX10 + Z11-Pro 2
Back when I had a FT-dx1200 I made my cable to connect the rig to my
AT-600Pro tuner and if the other Yaesu rigs are the same (check your
manual) then you can replicate what I did.
The PDF of my "LDG AT-600Pro AutoTuner to FT-dx1200 adapter cable
project.pdf" which is the solution I used is still available in the
Files folder of the groups.io/g/FTdx-1200.
If anyone needs a copy they can go there to download it or contact
me off list and I will email it to you.?? I have already
sent it to Jeff.
73,
Ed - ad7gr
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Mike Olbrisch
Ryan - N7WAA - 3143494 - WREL204 - 2NA283
N0YWB
Ed - ad7gr