I recently purchased a LDG AT-600ProII Autotuner and M-600 meter to use with my Icom 7300. The old MFJ 986 3Kw roller inductor I had was a good tuner, but it’s not automatic. It takes time to tune it and the Ameritron AL-811. The LDG AT-600ProII auto tuners are fast, they hold 2000 memories and are easy to use with the Icom 7300.
Since I’ve only had it a week I can only make a few comments. Both the auto tuner and meter are working good and I’m happy with them. I have used an LDG IT-100 with my Icom 7000 for a long time and it has been good to me.
LDG AT-600ProII Autotuner
What you get with the LDG AT-600ProII Autotuner is a power cable. I threw it in my supply box. Hi Hi. You won’t need it.
For the Icom 7300 get the the IC-PAC cable, it’s a separate purchase. It supplies power from the IC-7300 and it’s all you’ll need. – $10 extra.
One end of the IC-PAC connects to the back of the IC-7300 and the other end has two connectors that go to the autotuner. One is for power and the other is for the tuner itself.
Nothing needs to be done in the Icom 7300’s menu. It will detect the auto tuner automatically.
- With everything powered off, connect a coax jumper between the antenna jack on your amp to the TX jack on the back of the tuner.
- Connect your antennas to the rear of the tuner and connect your ground wire.
- Connect the IC-PAC cable between your Icom 7300 and the autotuner.
- Power up the Icom 7300 and go to the desired frequency.
- Select the correct antenna using the “Ant” button on the front of the auto tuner.
- Bypass the amp for now (either with it off on in stby).
- Tune the IC-7300 as you normally would by pressing the “TUNER” button on the transceiver.
- It’s ready!
I like the advanced (manual) tune operation of the auto tuner. It allows for manual inductance and capacitance adjustments to get the SWR to its lowest. These settings can be saved into memory and that part appears to work very good. I’m very happy with the auto tuner so far.
LDG M-600 Meter
At first I didn’t think I would need this, but after using just the auto tuner I found out in short order that a meter is needed if you’re running an amp. The led bar doesn’t suffice when tuning for maximum power output.
The cable that’s included with the meter hooks right up the the autotuner. I had a little trouble getting the plug connected, but it’s secure now. The back of the meter is flimsy.
- Turn off the AT-600ProII Autotuner (Powering off the IC-7300 will turn it off).
- Connect the mini-DIN cable to the jack on the rear of the autotuner.
- Connect the other end to the jack on the rear of the M-600 meter.
- Turn on your IC-7300 and you’re ready to enjoy the M-600.
The meter is very lightweight. I just expected a heavier meter. When I touch a button on the front, the entire box moves. I’ll need to secure in place somehow or hold it down when I press buttons. Other than that, it looks good, works good and has a nice big meter!
I like the meter set in “Peak” mode when operating SSB. The meter doesn’t fluctuate like my old meters did, so it’s taking a little getting used to.
Overall the M-600 compliments the LDG AT-600ProII Autotuner nicely and there’s no need for an extra coax jumper. The supplied DIN cable is all you need.
In the clip below we go over the M-600 calibration, the LDG AT-600ProII menu, advanced (manual) tuning and saving to memory and putting the auto tuner in bypass mode. There are some examples of what the auto tuner and meter looks like while in SSB and CW mode. Thanks for watching!
Thanks for dropping by. Please comment below. What do you have in your shack?