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Reviews Categories | Antenna Tuners | Palstar AT4K Help

Reviews Summary for Palstar AT4K
Palstar AT4K Reviews: 59 Average rating: 4.7/5 MSRP: $895.00
Description: The AT4K is a premium quality American-made matching network
Product is in production.
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W6PC Rating: 5/5 Sep 25, 2014 09:31 Send this review to a friend
EXCELLENT  Time owned: 0 to 3 months
Just purchased an AT4K directly from factory to replace a less capable unit.

I must say, I am impressed with design, construction and especially the operation.

As mentioned by others, new users should refer to the manual regardless of how smart you think you are, life will be easier for preset tuning spots.

A little on the expensive side, but you definitely get what you pay for in this instance.

If you need a good coupler, your search is over!
NW3Y Rating: 5/5 Aug 19, 2014 07:24 Send this review to a friend
Very smooth  Time owned: 0 to 3 months
Purchased the Palstar AT4K new as a replacement for another tuner that just was not of good quality. The AT4K looks and feels like it is very well built. It is smooth to operate and tunes nicely. The roller inductor is soft and consistent. The background lighting is nice and the front panel is operator friendly. It handles the power loads well as I use it on 80 and 160 dipoles. It just went in the station a few weeks ago, so I can report more on this as contest season progresses. Right now I would highly recommend this tuner.
K5DSQ Rating: 5/5 May 7, 2014 15:20 Send this review to a friend
Excellent  Time owned: 0 to 3 months
I previously had a Palstar AT1500DT which I loved. I never had any issues with it so when the decision was made to acquire a legal limit amp another Palstar product was a no brainer. In addition to greater power capacity I wanted something that would handle my 600 Ohm balanced lines utilizing a more conventional approach than the typical balun on the output side of the tuning network. The AT4K fit that bill to a T along with the needed power requirements. I have yet to have any issues with the AT4K operating it on 160/80/40 at legal limit every day. First time users need to follow the suggested settings versus the select band otherwise they will get very frustrated trying to find the tuning sweet spots. The AT4K is big, has impressive operating specs (verified in QST) and is built like a battle ship!
KF4OKF Rating: 5/5 Jan 24, 2014 17:57 Send this review to a friend
Great tuner  Time owned: 0 to 3 months
After considering many tuners on the market I decided on the AT4K since I wanted to add an amp to the station. My antenna is a delta loop for 160 M fed with 450 Ohm ladder line so I needed a tuner that would tune up all bands from 160 through 10 M. Taking the tuner out of the box I was amazed at the quality and sturdiness . The tuner easily handles the loop and takes 600 W out of my Ameriton ALS 600 with ease. If you are looking for a tuner that is well made and has the ability to tune a loop antenna take a look at the AT4K. Thanks to Palstar for making a great product.
K1BZ Rating: 5/5 Nov 11, 2012 18:28 Send this review to a friend
Looks like a Keeper!  Time owned: 0 to 3 months
Installed at K1BZ a week or two ago to tune a wire vert on 160 and 80. So far I'm very pleased, smooth as silk tuning & handles a KW with ease. /DL
K9CTB Rating: 5/5 Jul 11, 2012 17:32 Send this review to a friend
Excellent across the board!  Time owned: 0 to 3 months
I purchased my AT4K to replace an aging Vectronics HFT-1500 (Pre-MFJ unit). Now, I admit that I gave the Vectronics a 5 in my review here. That said, then hands-down the Palstar deserves a "10"!!!

I could use the Vectronics to match any and every antenna I used, including for kicks, my rain gutter system. The problem was using anything more than 400 watts on 80 or 40 -- as stated on others' reviews, it was creative lighting at it's finest!

Those days are OVER!! The Palstar AT4K *is* what I had hoped the Vectronics would be -- the last tuner I would ever have to purchase. I use two antennas for 80 and 40 + MARS. One is a reg'lar dipole cut for right around 4MHz. The other is a standard sized G5RV, except that I exchanged the close-spaced twin-lead with standard window-line.

I have found the AT4K to work extremely well with either of these antennas. It allows me to operate effortlessly on my favorite frequencies on 80 and 40 as well as any of the MARS frequencies I need. While I have been happy operating in the 100-200 watt range, I have been working on a project amplifier, which literally came from a dumpster. With a lot of help from Dan at, I have a complete and perfectly operational Henry 2KD-5 amplifier. I'm rather proud of the fact that, although I got a lot of technical and parts support from Dan, I did all the labor myself -- so naturally I want to use the amp I worked so hard to restore. This is what justified the expense of the AT4K. Palstar hasn't let me down!!

I have been trying to determine why the Vectronics has such a difficult time operating QRO, so I have compared it to the Palstar AT4K and have an anecdotal idea of what may have gone wrong. In addition, of course, to very high quality components in the Palstar (the roller inductor and capacitors look very similar to what you would find in REAL mil-spec gear), as mentioned by other reviewers, most other tuner manufacturers place their built-in baluns on the output side of the "Tee" network. Palstar, on the other hand, places their balun on the input side of the matching network. Palstar explains why they take this approach on their website, but I believe that there must be some huge fields built up during extreme matching cases where voltages on the input capacitor are more than large enough to arc-over. and as stated, at 400W or above, that's exactly what happens with the Vectronics. The AT4K on the other hand, can take every bit of the 1400 watts my Henry amp delivers without raising a fuss at all -- on any band, 80 through 10 (I don't do 160 - and neither does the Henry - just yet).

Overall, I wish I had saved the money I spent on other antenna tuner solutions and went directly with the Palstar AT4K from the beginning. Sure, I learned some lessons, but I think the tuition was a bit steep! :-)

W0AW Rating: 5/5 May 4, 2012 06:38 Send this review to a friend
Built Like A Tank!  Time owned: more than 12 months
After many years of frustration with an MFJ-989C that would eat the SWR bridge every few months, I finally gave up and purchased the AT4K. I didn't want any more tuner related problems so I went into overkill mode with the AT4K. The tuner has worked very well until this past January. The unit suddenly refused to tune anything. Shipped the unit back to Palstar where it was pronounced functional & no problem found. The unit was returned and functioned fine,...for about eight weeks, then wouldn't tune a dummy load. Sent it back to Palstar and was again told that it was fine. Put it back into operation and it wouldn't tuna fish, let alone an antenna. Finally took it to K0GX for repair and Gary said it worked. While demoing the unit I noticed that the SWR would occasionally jump. Finally found a fractured solder joint at the back of the roller inductor. No doubt, this was the problem. The unit is back inline and working fine. I don't consider the fractured solder joint an issue for Palstar. The fractured joint could have been a result of shipment issues. Would I buy another or recommend it to a friend? In a heartbeat!
N0AZZ Rating: 5/5 Jan 20, 2012 03:57 Send this review to a friend
The Best Tuner Made Today  Time owned: more than 12 months
Have owned a lot of tuners new and old some held up as built better than anything in the last 50 years well it just ain't so!

The AT4K smacks of quality even as you first open the box if you get one you will what I mean this baby is as well packed as any of my $6000+ radios. I use this tuner for QRO to QRP and beleive me it excels on the QRP rig as well as anything no loss in the tuner I have my Oak Hills Research QRP watt meter the other side of the tuner and the loss is about 1-2 milowatt's very acceptable to me.

I would recommend this tuner to anyone who needs a quality low loss tuner QRO to QRP.
NY4DX Rating: 2/5 Oct 26, 2011 20:08 Send this review to a friend
Poor QA/QC  Time owned: 3 to 6 months
I purchased a AT4K from Palstar earlier this year and noticed something strange. The Selector Knob for placing the unit in line "tuned" or allowing the antennas to be placed in a by pass "direct" mode was installed and positioned backwards.

So Antenna 1 was actually being selected as Antenna 2 and vice versa. This wasn't a big problem but I paid a lot of money for the unit and wanted it to be correct.

So before vacation, I contacted Palstar Tech Support who told me I was "nuts" and the unit couldn't be screwed up. Then the tech support told me...the customer...that I was "wasting his time" by discussing this problem and to send the unit back to Palstar. So I did. ...and I waited until I got the tuner back before writing this review.

Palstar claims the AT4K Antenna selector knob was installed and positioned incorrectly. They repaired my AT4K at no cost. (except for my expense of sending the units down to them).

My operating experience with the unit is that it is verrrrry can tune a mismatched antenna to registered a low SWR at a point that can best be described as having very sharp skirts...a slight variation from that perfect point and your SWR readings can go form 1.2 to 6.5 moving the knobs ever so slightly.

My rating is low for this unit because of what Palstar "claims" was a mis positioned knob. If this was the case..Palstar could have made a tech support statement to fix the problem over the phone...but when tech support told me I was wasting his time...back the unit goes...

A mispositioned knob (if that was what it was...maybe the unit was wired incorrectly?) is poor QA/QC. and telling a customer that he is wasting his time...0/5
WD8RWI Rating: 5/5 Mar 18, 2011 14:07 Send this review to a friend
Excellent Tuner  Time owned: 0 to 3 months
I have had any number of tuners including a Palstar AT100CV among others and bought the AT4K to go with a QRO amp that I now have. I have checked this tuner out on all bands and it tunes everything quickly and repeatably. If you need a high power tuner this is one you should seriously consider.
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