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Reviews Categories | Amplifiers: RF Power - HF & HF+6M | Ameritron ALS-1300 Help

Reviews Summary for Ameritron ALS-1300
Ameritron ALS-1300 Reviews: 73 Average rating: 3.9/5 MSRP: $2,899
Description: HF No tune Amplifier, 1200 watt solid state w/switching PS
Product is in production.
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KE4KMG Rating: 5/5 Jan 29, 2015 18:22 Send this review to a friend
Great Amp  Time owned: more than 12 months
Owned since 2012 and love it, great for DXing or ragchewing. Power output is great on all bands. Have not had any problems. I would recommend it to anyone!
YB1FWO Rating: 2/5 Jan 4, 2015 22:05 Send this review to a friend
Poor linear  Time owned: months
I bought ameritron als 1300x , and used it first on ARRL 10 contest,. After about 1 hour (only hunting), the band indicator lamp dead,.. Since it was have just started usimg it and just less than a week since I bought it, I returned to the seller (ameritron agent in indonesia), after they fixed it .. Than I try again,.. It worked,. But soon as I transmit on 10 M while the band switch still at 15 M,.. The amp become totally dead,.. In my opinion, it should activate autoprotect instead of totally dead... , mis band is always happened while we work contest, and my other amp (HL 550 FX) only goes protect and after restarted, work normally again.
Now the amp still at the agent and seem they cant find how to repair it... So sad,..
I really regret to buy this one


KW4CQ Rating: 5/5 Nov 17, 2014 05:53 Send this review to a friend
Mine is the ALS-1306 model  Time owned: 0 to 3 months
The external band decoder is now built into the 1306 thereby eliminating the need to purchase the external RCS unit. Works flawlessly with my Yaesu FTDX-5000. It's like having a 1200 watt no-tune transceiver. The amplifier now comes with the optional 10m band coil kit factory installed and the big plus is now having up to 1200 watts available on the 6m band for DXing. The fan noise is hardly noticeable and the amp runs absolutely cool on CW and SSB at a full 1200 watts output. Using nothing more that a dipole this amp helped me nail FT4TA in some horrendous DX pile-ups. A small footprint desktop design and nicely built inside and out. I love this amp. A real keeper.
W8NWN Rating: 5/5 Nov 6, 2014 21:47 Send this review to a friend
Still Strong  Time owned: 6 to 12 months
This is my second review and the amp is still going strong! Just sits there and perks away. No problems.
W6LMJ Rating: 4/5 Sep 2, 2014 11:04 Send this review to a friend
Great amplifier, but...  Time owned: 6 to 12 months
After 40 years with Heath Kit amplifiers I decided it was time to move to a solid-state amp. I had used an SB-200 and a SB-220. I was very pleased with both. But I am now interested in remote operations and so a solid-state amp was on my short list of things to have. This past Christmas the family came together to provide one. I choose the ALS-1300. Even with all the negative comments, I felt comfortable with the notion of fixing it as needed. The first few months I had the amp I discovered little nit node problems in my antennas system. Things the SB-220 would work through caused the ALS-1300 to fault out. After chasing several intermittent connectors and one bad piece of coax all seemed well. Thats what happens when you have a station for 20 years in one place. Stuff gets old and problems greep in. This past month I added the ARI-500 to the mix in order to have automatic band switching. The ARI-500 seemed dead on arrival. Nothing powered up. I switched rigs, from a IC-756P2 to an IC-746P thinking that might be the problem. Still nothing worked. So I called HRO and they suggested returning it. I got a second one and the same problem as the first, dead on arrival. With this one I also received a cable for the IC-7000 and so tried it with that rig. No joy. So I called Ameritron and luckily got through on the first ring. The nice lady connected me to a technician who walked through trouble-shooting the problem. He was surprised I had tried three different rigs and we agreed the common component was the ALS-1300. Using the pig-tail J45 to pull voyage from the A/B J45 connectors on the back of the amp we determined, given there was no voltage, that that was where the problem lay. It was at that point that the technician shared that sometimes the ribbon cable becomes disconnected from the two A/B J45 sockets and that I should look inside the amp to see if that was the problem. I had a MOD10MK kit to install for 10 meters, and so quickly and happily pulled the amp off the stack of stuff and opened it up. Sure enough the ribbon cable was undone. I reseated it and stuck a piece of white packing foam in behind it to put a little pressure on it to hold it in place. I then installed the 10 meter kit, moving the jumper as instructed. That was very simple. I put the amp cover back on and re-cabled the amp. Perfect the remote band switch now works and I am again very pleased with its function and performance. But, Ameritron should have placed a small piece of foam behind the ribbon cable and saved the cost of the returned ARI-500 and the several hours I spent fiddling with and thinking about a problem they could have easily prevented from occurring in the first place with a nearly no-cost 3 second fix.
AB2IR Rating: 5/5 May 30, 2014 06:23 Send this review to a friend
so far great  Time owned: 6 to 12 months
Replaced my heathkit sb 2kw amp, decided a simple auto tune unit will save my old age bacon. Was hoping for just 200 watt range on min. level, but this unit kicks out about 300-350 watts to start. Only complaints: my power switch, it arcks if pushed slow. Believe switch is defective, but works. Have not bothered to call about switch yet. And trying to remove RJ cable from remote jack on rear, tough, release pin just does not clear for some reason. Remote control head is just ok for me, stopped using it because of cable mounting position and where to place it on my desk. Amp is next to radio anyway. Ameritron seemed to have fixed the dc power supply issue, no real problems at all.
N8VB Rating: 3/5 May 20, 2014 05:09 Send this review to a friend
So far so good  Time owned: 0 to 3 months
I purchased the ALS-1300 at the end of March 2014 from DX Engineering. I also ordered the 12/10 meter kit. The amp would go into protection immediately on 40 meters operating into a dummy load, the other bands all worked fine. I contacted Ameritron Service and they wanted me to send the amp in for an exchange. They said turn around time was 2+ weeks. Before sending it in, I took a look around inside the amp and found that there was a resistor in the LPF input bridge circuit that was considerably different in value than what was shown on the schematic in the manual. I changed this resistor to the value called for in the manual and it then worked fine on 40 meters. Since then the amp has been working well. I can easily get 1200+ watts out on all bands with a maximum of 55 watts of drive. On the air, I keep it at 1000 watts for a much cleaner signal.

The amplifier seems to be well built inside other than the resistor problem mentioned above. The amplifier enclosure is longer than the separate power supply enclosure which is a bit odd looking when they are sitting side by side on the desk.

I took one point off in the review for the problem out of the box on 40 meters. Obviously the amp was not thoroughly tested at Ameritron before leaving or they would have caught the 40 meter problem. This leaves the customer to be the quality control department and also the service department (if you don't want to wait for the weeks of turn around time and shipping charges). I am glad I was able to fix the problem, otherwise I would be much less happy with the purchase.

I also took one point off because the enclosure is very flimsy and it required Ameritron to put in a multitude of screws to hold it together securely. It is very painful if/when you have to get inside the amp (as in when you have to install the 12/10 meter LPF kit). Like most of the MFJ stuff, the front and rear panels are also somewhat flimsy. I wish Ameritron would have used a slightly thicker sheet metal for the enclosure.

I had to decide between the AL-82 and the ALS-1300 when I wanted a new amp. I am almost sorry I did not go for the AL-82 (2 x 3-500Z). The initial problem with the ALS-1300 has made me wonder about the reliability of this amp. The instant on and no tuning is great, but I still have to use an external tuner with my ladder line fed antenna, so I am not sure I save any time on the no tuning part since I still have to twiddle the knobs on my manual tuner. I know I could purchase a legal limit auto tuner, but that adds considerably to the overall cost in getting an amp.
W6FCS Rating: 5/5 May 19, 2014 15:33 Send this review to a friend
Neat Little Amp  Time owned: 0 to 3 months
Received today 5/19/2014 after a month wait, from DX Eng. Serial No 24072. Installed 10 meter option. Turned on, followed instr in manual. Only operated it on 20 meters. 50 watts drive gives 1200 watts out. I'll test out the other bands when I use my wire antenna (currently using 20 mtr mono beam). After using my big Henry amps for many years, it certainly is fun to run this little amp. I am a happy camper. You will be too.
K2UE Rating: 5/5 Apr 7, 2014 17:37 Send this review to a friend
Seems to be mature  Time owned: 0 to 3 months
I purchased the ALS-1300 to replace an Alpha 87A, which is a tough act to follow. I use it with an Apache Labs Anan-100 and PureSignal Predistortion. On 160m to 30m I use an MFJ-998 into a Alpha Delta DX-B Half-Sloper, and for 20m up I use a K4KIO Hex Beam. The ARI-500 interface is nicely able to auto band select using the Kenwood mode from DDUtil on the OpenHPSDR CAT output. I set up the power level on each band to where the the ALS-1300 is showing a 10% gain decrease from it maximum value, essentially the 1dB compression point -- this ranges from 1000 to 1300W on the various bands, with drive levels from 50 to 70W. With PureSignal on (I never turn it off) the off-air IM measures -55dB or better, and needless to say, the signal reports are excellent. For my purposes it is perfect, and fast to deploy. The internal workmanship seems good, as judged by a retired commercial SSB design engineer. Solid-state plus predistortion is clearly the future. Highly recommended in this context.
W8EZI Rating: 5/5 Apr 7, 2014 11:38 Send this review to a friend
Works like a charm  Time owned: 6 to 12 months
I am 71. I owned an Ameritron AL-80B for 13 years. It was and is a great design and good amplifier. I sold it because I am no longer able to lift it and carry it outside for a yearly compressed air cleaning.

I sold it and bought the ALS-1300 because I can lift it. Sounds like dumb reason, but getting old means making adjustments.

This amplifier was an older model that had been back to the factory for repair and mods for a second time and the ham who owned it was fed up. He told me he would sell it to me as soon as it came back from the factory. That was 8 months ago. It has been doing a great job for me ever since then. Thanks God for the overload circuits in it. I would have blown it by now without them. It is so easy to get in a hurry and make a mistake. A nearby ham on 75 meters who has a lot of experience told me he heard a subtle difference in the audio quality over the AL80B.

I like that fact the MFJ is in America and has a long track record of support for their products. Other amplifier companies have come and gone.

BTW, I looked over this amplifier inside and out before firing it up. I was looking for bad solder joints or just anything amiss. It looked OK. I also own an ALS-600. You must be careful with the 1300 when switching between the two amplifiers. The 600 will take 80 or even 100 watts input without blinking. The 1300 cannot stand that much input power. I run it full bore output with 60 watts input. Any amount over that pops the overload circuit. I have mine hooked to 220. I have seen 1500 watts come out of this thing before I quickly turned down the drive to get around 1200 watts output.

MFJ sells amplifiers in general for the rest of us. Meaning, I have a lower middle class income. I could not afford a Tokyo or Alpha amplifier. After owning 3 Ameritron amplifiers I would not even want to buy Alpha or Tokyo even if I had the money. The Ameritron brand as carried on by MFJ is making qualilty amplifiers available to hams like myself. I wholeheartedly recommend this amp.
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