Operating the MFJ-993B auto tuner remotely on the LAN

Keith Mitchell

KF4HR

KI4P

That's kinda what I was thinking, just wasn't sure if understood his question, I use the Ldg and that's all I do.

Jim Gilliam

The Palstar which I am using remotely has memories and tunes to a frequency that is close to a memory channel. I just "spike" it for a second at full power and wiat for it to tune automatically. Then, resume operation. If the MFJ has memories it should operate the same way. Sorry you didn't buy the Palstar HF Auto. It is a keeper.


Jim, K6QE

Mark_WS7M

The 993B should also have memories.   

I do find with my 993B that sometimes I need to "reset" it with a power cycle for the tuning to work.  Could just be my unit.

But since you plan to have it remote, you might consider some kind of a web or network switch to cycle power on it.

I think virtually all tuners prefer to tune at less than max power.

Keith Mitchell

Okay, I think Jim is saying once I have some memory running stored in each band, the MFJ993B will jumped to the closest setting without my pressing the tune button. That being the case, I can certainly walk back and forth between the two rooms to store some settings. I was jumping to the conclusion I would have to do it every time I wanted the unit to do its job.  I'll have it hooked later today and see if that works. 

Rick N4RZ

I also use the Palstar HF-Auto, but with the W1TR programs, the tuner will follow the radio frequency and is ready to go whenever you want to use it.  Note: on band changes you may have to wait up to ten seconds since this tuner does use a roller inductor, unlike the MFJ autotuners that use relays to switch capacitance and inductance values.  

James Charlton

Keith Mitchell

Dwayne_AB6A

James Charlton

I second that!
Basically, never tune at high power.
I am trying to devise a workaround to the pressing the "tune" button on the transceiver or Maestro (I don't know how the computer version works).  As careful as I try to be, I sometimes forget to tune after changing bands and the amp sees a surge of reflected power and goes into bypass.

I then get to run from my shack on the second floor to the basement to reset the amp and run back up again.
  Annoying, but probably good exercise.
Jim   AD0AB

Dwayne_AB6A

Let me know how you go with your program/hardware. I will post when I have something working. My approach is to monitor for large changes to TX frequency and enable hw lockout.

Norman Clanton

My problem is similar, although somewhat different. I have an older LDG tuner (AT-1000), which works well, but retuning must be initiated by the press of a button on the tuner. I would like to figure out how to get a control signal from my Flex 6400 that I could used to trigger a relay to simulate the button push whenever I put the radio into the "Tune" mode from the Maestro. I am not presently using an amplifier, but the ability to do that would enable me to operate remotely. Any thoughts?

73, Norm KA1SG

KI4P

I use the LDG1000PROII tuner on my 6400, I just have it set to auto tune and when I switch bands or different ends of band it auto tunes fine, works great whether I'm at desk or running remote. I just hit tune button on radio, works great! Not sure how old your tuner is. LDG has come out with a program that allows you to initiate a tune via computer, check out there website.

John KB4DU

Keith;

I use an MFJ 929 tuner wit the 6400, no amp. This tuner uses the same logic and interface as the 993, except it doesn't have the meter, No interface cable is used, but then the tuner needs power from a source besides the radio.

The MFJ manual isn't the best, it takes some reading and some experimentation to get the results desired.

Page 6 of the manual describes the sticky-tune feature, which I have turned on. All I do is click the Tune button in SmartSDR, with a tune power of 10 watts. This triggers the tuner to determine a match. If the frequency is close enough to a memorized frequency, the tuning is very quick. If the tuner has to hunt for a match, the process is a little longer ( and noisier). The only time I use the tune button on the tuner is when I want it to find a better match, below 1.7, which really isn't necessary since the Flex is quite happy at 1.7 or below.

Also, I changed the function of the tune button ( a menu setting) so that a short press forces a retune, rather than the default long press.

Hope this helps.

Keith Mitchell

Thanks, I'll give this a try in the morning. I have smartSDR on a laptop now so I can sit next to the tuner and 6400 to see how it operates. What you described should work fine if I take the time to spread a few memorized matches through out each band I operate.

Steve Potter

I use my 6300 with a 993B, auto button OUT, and pressing Tune in SmartSDR prompts the 993B to commence a tune. If the Tune button is IN, then it expects the 993B tune button to be pressed (along with 10watts RF) to instigate a tune (except immediately after a power cycle when just presenting RF will cause a tune. This is when an radio interface is NOT present.
Steve
 

perrelliphoto

Hi





mfj998 and Icom 7300.

1- Can I press auto tune at 100 watts(7300)? Or must it be 20 watts?



2- I have the Icom interface cable installed butin reading, It said that I should hear a beep from the 998, upon turn on, to confirm the two units are reading each other? I do not hear a beep.

3- Lastly, shld a jumper be removed inside the 998 for proper operation to the Icom 7300?







Thanku

Bill

n1mrk

W5WN

Has anyone found a way to remotely power up the MFJ-998? There is nothing in the manual. When rebooting my 6500 with a power up procedure it would be nice to power up the MFJ-998 as well. Otherwise, it's off and I can only use the internal tuner in the 6500. I need the MFJ-998 to be turned on so that I can run my amplifier. There is a momentary switch (SW2 according to the schematic) that turns it on. I guess I could always run the contacts of the switch to a jack on the rear panel and activate it that way.