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| Reviews Summary for Dentron GLA-1000B |
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Reviews: 21
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Average rating: 4.3/5
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MSRP: $msrp gla1000b
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Description: 10-80MTRS 1200W INPUT HF AMP
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Product is not in production.
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More info: http://
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write your own review of the Dentron GLA-1000B.
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AC8GX
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Rating: 5/5
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May 23, 2012 06:31
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Great Amp for the money
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Time owned: 0 to 3 months
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I bought this amp during Hamvention 2012, I found several of the amps available. I chose and amp that looked practically brand new!!!
I got it home, actually read the directions...hi hi
This is a great little amp, 100 watts in from my FT 950 gives 500 watts on the lower bands and just shy of 500 watts on 15.
Its my first amp, its easy tune, work great with my Beam and Loop both.
On the tubes, I was able to find numerous 6lq6's at hamvention, which I now own, just in case!
If found a great little amp for a great price
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ZL4IV
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Rating: 5/5
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Apr 29, 2009 18:20
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Great Little Amp
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Time owned: more than 12 months
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Well I swapped mine for a DOA FL-7000, fixed that but missed the little amp so much I brought it back! For a few bucks I fitted a cathode cut off by paralleling two 150 ohm 1w resistors off the anode of the bias zener to the choke, used a 12v relay I found in the junk box to short it out on TX. Paralleled it up with the K1 relay and now it is like expensive amps, cuts the tubes off on receive. My advice is to ignore those lazy commentators and spend the $4.00 and half an hour and you have a Great Little Amp. As for the tubes, obviously they don't look hard enough, I have many spare sets not that I will need them after doing the cut off mod. Five to six hundred watts PEP no problem. If you find one, buy it, I will email you how to make it even better.
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ZL4TGH
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Rating: 5/5
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Dec 5, 2008 20:33
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Great Amp
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Time owned: more than 12 months
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I have 2 Dentron's, the other being the MLA-2500B. The 1000B gets the most use because it is easy to tune, give the right amount of punch when I need it. There are two spare sets of valves that will out last me. Only one problem years ago was the bias zener, it went and the amp turned full on! Caught it in time, no damage. Don't know why but it never did it again. The amp cost me a few hundred bucks and the new tubes about the same. Looking at the cost of solid state Amps now, why would you bother to pay so much for the same performance? and you get that nice warm glow of the tube heaters, ah just paradise :)
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W4INF
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Rating: 5/5
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Feb 3, 2008 04:50
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Works FB
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Time owned: 6 to 12 months
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For function and build, I would have to give it a 5. It was so easy to tune my 10 your old daughter could do it. The old tubes were tired, but I still got 500w out of what is a 600w rated amp. Audio was clean, it easily interfaced with my Icom 718 with nothing more than an RCA patch cable. I did not use QSK with CW but CW did work fine.
Bought mine for $250, and sold it later for the same $250. Solid built, attractive unit. A true shame Dentron is no longer in business.
Many reviews on the Internet are biased for too critical. Sure, this is not a modern amp, and true it uses sweep tubes... but at the time it was designed and built it was modern. My review is based on function, fit and finish.
73-
Andrew
W4INF
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WB5RAX
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Rating: 5/5
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May 14, 2007 18:48
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Dentron GLA 1000 Amplifier
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Time owned: 6 to 12 months
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I've had my GLA 1000 about 6 mo. now. I am very pleased, it gives 500W CW output with 100W drive from my Heathkit HW100. It came with 4 good tubes. I got it through Ebay for $200. A good buy, I think. Looking to the future, I started shopping for spare tubes on Ebay, and learning about the tubes that are suitable for this amp. I have learned that 6je6, 6je6a, 6je6b, 6je6c, 6lq6, 6me6, 6mj6, are all OK for it. Also, "MATCHED SET" tubes are not needed, despite what the tube merchants tell us. Tubes that check close to the same on a tube tester work well together. You just don't want to mix some weak tubes and strong tubes. As an experiment, I installed a 6je6, a 6je6a, and two 6lq6's, all different brands and got the same 500W output. The tubes checked equally strong on a tube tester. I have purchased 12 spare tubes so far from Ebay, the average price being $6.75. Most of the tubes were 6lq6's. So I think one of these GLA 1000's is the most bang for the buck in small amplifiers, the performance is on a par with the Ameritron AL811 and costs much less. As far as conversions to other tubes, I think there are probably as many 6lq6 type tubes in the world right now as there are EL509's, so why do the conversion. Besides the sellers of EL509's want the same price as a premium set of 6lq6's anyway! I think the conversion to GI7B tubes is a great idea if you want to do that, I don't know if it is worth the cost of having the conversion done by a specialist, that money will buy a lot of 6lq6's
or 6je6's. So if you have one of these amps or are thinking of getting one, go to Ebay and find some spare tubes for the future and then the future of your GLA 1000 will look great!
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K8DGL
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Rating: 5/5
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Jan 11, 2006 06:37
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Wolf in sheeps clothing
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Time owned: 6 to 12 months
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This is the second GLA-1000 I have owned. I performed the GI-7B conversion on it and I am Very Pleased to say the least. The conversion info on the web is outstanding.
I found a high volume fan that is super quiet that provides the finishing touch.
600 watts output with 60 watts drive is nice for an amp I have less than $200 invested. Besides the enjoyment doing the conversion.
I'll be enjoying this amp for years to come.
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W8WZ
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Rating: 4/5
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Aug 19, 2005 19:23
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GLA-1000
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Time owned: 3 to 6 months
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I am very happy with my GLA-1000.
It is a simple little desk top amp that runs on 110 that gets the job done. Mine is on its second set of tubes in 20+ years and easily puts out 500 Watts PEP. There is an easy mod to replace the tubes with EL509s incase these sweep tubes get too expenisve.
The amp doesn't have a tuned input - but since my exciter has a built in antenna tuner- I just use that. Some other reviews have said it is hard to tune and has a loud fan. I don't find either of those things to be true of mine. If you see this amp for under $300.00 I would buy it. If it is over $300.00 - you may be able to buy more amp for your money with other models.
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PA0FRI
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Rating: 4/5
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Jul 28, 2005 06:34
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GLA-1000 conversion with 2 × GI7B
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Time owned: 3 to 6 months
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Converted with 2 × GI7B (or 4 × PL519)puts out about 400-500 W on peaks with minor mods of the original schematic, see http://www.xs4all.nl/~pa0fri
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KC8ZAO
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Rating: 5/5
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Dec 2, 2004 18:32
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Dentron GLA-1000 GI-7BT Conversion
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Time owned: 3 to 6 months
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This conversion amp by N8GPQ is great. It is a carefully thought out conversion that looks clean and works great. There is a website that shows pictures of how the conversion is done and there are circuit boards available for the new caps and voltage doubler. I am completely satisfied with mine. I drive mine with about 40 watts and the cabinet hardly gets warm. This tube has a high gain. Make sure you don't overdrive it.
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KB3JZG
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Rating: 2/5
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Jan 30, 2004 21:33
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Dont convert it
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Time owned: 3 to 6 months
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Dont do the converstion, contary to what some here think, if you do it, you end up and have to modify the rf board, by dropping it ever so slightly, or they wont fit inside the case, and by doing so, the bottom of the tubes dont get cooled by the fan!! And you WILL end up cracking them.... If you do the mod, get GE 6kg6a's.. they are not as tall, and they are as tough as the russian tubes, and will put out the same amount of power.....
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