- Amateur Radio (Ham Radio) Community

Call Search

New to Ham Radio?
My Profile

Friends Remembered
Survey Question

DX Cluster Spots

Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement

Reviews Categories | Antenna Tuners/Matching Networks | LDG AT-200 PRO II Antenna Tuner Help

Reviews Summary for LDG AT-200 PRO II Antenna Tuner
LDG AT-200 PRO II Antenna Tuner Reviews: 23 Average rating: 3.7/5 MSRP: $259.00
5 to 250 watts SSB and CW. (100 watts on 6M)
Easy to read LED bargraph display for RF power, SWR and status
LEDs for Antenna Position and Bypass

4,000 memories (2000 for each antenna) for instantaneous band changing
Two position antenna switch with memories for four antennas on each position
Tuning time: 0.5 to 6 seconds full tune, < 0.1 second memory tune
Built in frequency counter for memory operation
Frequency coverage: 1.8 to 54.0 MHz.
Tunes 6 to 800 ohm loads (16 to 150 ohms on 6M), 6 to 3600 ohms with optional 4:1 Balun (LDG RBA 4-1)
For Dipoles, Verticals, Vees, Beams or and Coax Fed Antenna
Optional external Balun allows tuning of random length, long wire or ladder line fed antennas
Includes 6' DC power cable

Power requirements: 11 to 16 volts DC at 750 mA max during tuning WM1024-760 and 1953663 are compatible power supplies

Enclosure: 9.5D x 7.1W x 2.0H inches
Weight: 2 pounds
Product is in production.
More info:
Email Subscription
You are not subscribed to this review.

My Subscriptions
Subscriptions Help

You can write your own review of the LDG AT-200 PRO II Antenna Tuner.

Page 1 of 3 —>

MM0XXW Rating: 5/5 Jan 12, 2019 23:07 Send this review to a friend
Works well for me ....  Time owned: 0 to 3 months
... but if one were to rely solely on the numbers stated here then you simply wouldn't buy one!
However I did buy one (brand new) despite the 'numbers' and paired it with my Icom 7300 as the internal tuner was having issues tuning my 138' OCF Windom to acceptable levels on 30m.
Out of the box it looks a decent piece of kit and feels quite robust. If I was to complain about anything it would be the downloaded & printed instructions, I could have taken care of that myself!
Now granted it's a bit rattly-noisy while tuning but let it do it's thing and, once locked into the memory, it's a breeze on the next time round.
I have a multi-band vertical (10m ProWhip ground-mounted) and a 138' OCF Windom (9m asl) and neither antenna have given it much problem from 80-6m.
Obviously as it's brand new I can't comment on the internal build however it has performed exactly as I've asked it and I can't fault it so far so no issues here (touch wood!!!!).
IW2CXJ Rating: 5/5 Jan 3, 2019 17:00 Send this review to a friend
Great automatic tuner!  Time owned: more than 12 months
I have been using this tuner for more than a year with both Kenwood 480 HX and IC 7100 I am very satisfied it keeps 200 watts perfectly even in RTTY, I also had in LDG 1000 pro II but it did not seem to me so reliable, great job LDG!
KT4WO Rating: 4/5 Jun 22, 2017 13:42 Send this review to a friend
So Far- Good  Time owned: more than 12 months
I have had this AMU for about 6 months now and have waited to review till now. Having own/ed 6 other LDG
AMU's I know what to expect. --So far--It works as well as the others(Z-11P2 (2),Z-100 (2)).
I read many reviews on LDG "Tuners" and see statements like "I tried it on an antenna that was already 1.5:1 and it would not tune"
And it seems that new and old alike hams have said this. I recommend reading up on L-Network tuners(Auto or Manual) so you understand that an L-net tuner will not tune an already "good" load.(And why would you need to tune it if it's already 1.5:1 ?!?!?! NO L-net tuner will match the loads a T-net will, but the ones it will , will put more power to the antenna(normally).
Also I think many of the other reported issues are due to RFI. Are they perfect?,,, No...But having 3 in-service right now, with no issues, says something.
W4LTX Rating: 2/5 May 10, 2017 08:14 Send this review to a friend
Not as good as std  Time owned: more than 12 months
I have both the standard AT-200 Pro and the ProII. The original will match more antennas and do it much quicker than the AT-200 ProII
N5OFQ Rating: 5/5 Oct 25, 2016 19:32 Send this review to a friend
Nice tuner  Time owned: 0 to 3 months
I've had the older Z-11 Pro for 6 years and even mounted it remote for a while. I didn't treat it well and finally burned something. It still tunes fairly well manually. I decided on the higher power AT-200 since I run lots of digital modes and may have a 200w transceiver in the future. The AT-200 doesn't seem louder than the Z-11. So far, it tunes my 80m multi-band loop on all bands 80-6. I looked at several MFJ tuners but really wanted a 6m tuner and was happy with previous service from my Z-11. I don't understand why this tuner isn't rated higher.
LA2NI Rating: 4/5 May 15, 2016 05:25 Send this review to a friend
After repair, the tuner works fine!  Time owned: more than 12 months
I have had different LDG tuners before and I have been very satisfied with all of them. The first I built from a kit (AT11 v/2.4A) and used for many years and the same with a QRP tuner. But when I started to use the AT-200 PROII I felt that something was wrong. After a tuning sequency, when I started to talk into the mike, the tuner started to tune even with a perfect match. This was in AUTO and on the lower bands, 160, 80 and 40 meter.I decided to try to find out what was wrong. When I connecter the tuner to a good dummy load, I could zero the reflected power on higher frequencies but not on the lower bands. I found 2 faults: The resistor across the capacitive voltage divider in the bridge was only 1,5KOhm. Normally it is 3,3 KOhm or larger. When I replaced it with a 3,3KOhm, the zero improved on 40 meter but still not good on 160 and 80 meter. I then removed T1 and measured the inductance and it measured 12uH with the two bifilar 10 turns in series. I then wound 10 turns bifilar on a FT-37-43. This is the same size as the original core. It measured 160 uH. After installing this core into the bridge, the zeroing worked perfect on all bands and now the tuner does not start tuning when I run full 250W SSB on all bands.
I believe that a wrong core and 1,5KOhm resistor has been installed during manufacturing and it is possible that a lot of tuners have this fault. If the tuner is adjusted and tested on 30 MHz the fault is not seen.
I hope this can be to some help for others if they have problems with the tuner "going mad" when using SSB!
After this repair, the tuner works just as expected!
SP5MFK Rating: 4/5 May 2, 2016 02:35 Send this review to a friend
does the job  Time owned: 3 to 6 months
The tuner does fine job of matching even the stupidest loads to my FT-897D, within physics boundaries of course. it nicely switches itself to bypass when detects that i am operating on design frequency of my antenna and in general RF-wise i have no problems with the product.

It is however unbelievably noisy and it is no joke that it can wake up your family members.

The first tune of a poorly matched antenna also seems to take longer than expected. It seem that the tuning algorithm is flawed as at times it seems to hit low SWR early in the process (as crosschecked on an external meter) but then keeps cycling the caps and inductors only to provide series pf marginal results and finally reverting to combo discovered within first 3secs of tune. a 15 seconds of extra unnecessary rattling in your shack.
OE3SGU Rating: 2/5 Feb 20, 2016 01:38 Send this review to a friend
update   Time owned: 6 to 12 months
I used the 200 pro II on my last vacation in DU1. No chance to tune my 1/2 size G5RV on 20 meters. In 2009 I used the original AT-200 on the very same antenna and location without any problems. Out of interest I performed some tests at my stealth setup in OE1. This thing could not even tune my wires on some bands while the internal (!) tuner of the IC-7600 had no problem at all! This is not what you expect from an external ATU. It seems that LDG products are getting worse. I really liked them before, but this was probably my last LDG ever, I had a small issue with another LDG product and the service was very bad, the owner of that company is very arrogant and does not deserve my business. Unfortunately this happens with some companies. Once they are getting bigger and doing fine business they don't care anymore. I finally sold the 200 pro II and will use my trusty manual Palstar tuners instead.
KF6KXG Rating: 2/5 Aug 4, 2015 11:08 Send this review to a friend
Not as Good as the original pro  Time owned: 0 to 3 months
I have tried both the original Pro and the Pro II. I returned the ProII.
It is more sensitive to stray RF and will not tune to as low a SWR as my original Pro. It has a few more features like 2 added LEDs to tell the ant in use and if it is in bypass plus it has more diagnostic readouts on the two LED strips. Even taking that into account, I wish they would go back to the original tuning algorithm.
Another problem that I have with the company is that while Dwayne will promptly answer email tech questions, I prefer talking on the phone to get help. For this reason alone, I will probably look elsewhere when my original Pro needs replacement.
ZS5J Rating: 4/5 Jun 10, 2015 01:25 Send this review to a friend
Noisy   Time owned: more than 12 months
I bought this ATU from AES in Orlando while on a trip there. Initially I bought the lower powered AT-100 PRO II, but after looking at the price difference to this higher powered one, I went back to the store the next morning and asked them to swop it out for this higher powered ATU. For only $ 20.00 more, it is a no brainer to rather buy this one and have higher rated components.
I have a love/hate relationship with this ATU. They have VERY noisy relays. But it tunes just fine. The other problem with this ATU is the SWR sampling method using LED's is VERY inaccurate. I have an accurate LP digital vector power/SWR meter and a host of other analysers etc, and this ATU is very inaccurate. It may show an SWR of over 2:1, when it is actually 1.1:1. But it does the job of tuning just fine....just be prepared to warn other members of your house and neighbours, when they hear a jackhammer in your shack
Page 1 of 3 —>

If you have any questions, problems, or suggestions about Reviews, please email your Reviews Manager.