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Reviews Categories | Amplifiers: RF Power - 6M/VHF/UHF+ | TE Systems 0552G 50 Mhz 375 watts linear amplifier Help

Reviews Summary for TE Systems 0552G 50 Mhz 375 watts linear amplifier
TE Systems 0552G 50 Mhz 375 watts linear amplifier Reviews: 13 Average rating: 4.5/5 MSRP: $500
Description: Frequency: 50-54Mhz (tuned for 2 Mhz bandwidth) Input power: 10-25 watts; Output power: >375 watts; Amp. Ratio: 15 (25watt in 375 watt out); Class operation: AB linear;
Rx preamp gain: >15db; Rx preamp NF : <0.6db; Power: 13.8v 55A
Product is in production.
More info: http://
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VK3ZAZ Rating: 5/5 Mar 9, 2017 20:54 Send this review to a friend
Brilliant Brick  Time owned: more than 12 months
I first saw one of these at the other Steve house (Steve Tolley KL7FZ) at Wasilla and heard him work stuff I could not work on my FT650. The I bought one brand new from Janet and Chip at HRO in 1999. I used it to work all my F2 DX between 1999 and 2002 from VK3OT (25 EU countries) and VK8OT (DX records) then I hauled it out in my brief case to VK9XI in 2003 and worked 47 countries on 6M 15 hours each day using the TES 0552G and an MFJ 42/75AMP power supply. I ran 400 pep on SSB and 110 watts on PSK mode. Then I sold it to a VK6 and missed it ever since. So this week I bought a NOS in box and a second hand one off eBay on the same day for the same price as a new one. One will go onto my FT991 when it gets back from JA and the second will go on my 5/8th g/plane and be used for WSPR. I am using a PS60SWIII QJE SM supply rated at 60 amps.
I am putting my TE amps where my mouth is. This amp got me over 50 countries on 6M band and was run dxpedition style without a failure. I see on eBay a 432 MHz version has bid up over $600USD. I had to bid $400 USD to get the used one from USA. 73 VK3OT
K0PG Rating: 5/5 Jan 25, 2017 19:49 Send this review to a friend
Suds on 6 for 20 years  Time owned: more than 12 months
I have owned this and three other QRO amplifiers from TE Systems for over 20 years. The only problems I have ever had have been caused by operator error. Dave has always been responsive and eager to please. I have used tube amplifiers on 6, 2, 220, and 432. I appreciate the simplicity of the solid state amps. When I had the cooling fans going at the same time on my four tube amplifiers it got rather loud (and hot) in the shack. The fan noise was picked up by the microphone. A ham I was working asked if I had a Kenworth or a Peterbilt in the room with me. I can still work them on the first call with these amps.
WO2C Rating: 5/5 Apr 30, 2016 08:23 Send this review to a friend
Works perfectly.   Time owned: 0 to 3 months
I purchased both a 0552G & a 1454 amplifier directly from TE Systems. The amplifiers arrived in separate boxes, both extremely well packed, in just over a week.
The 0552G has worked flawlessly for the few days I've had it on the air. At 16-20 watts in, it delivers 325-350 watts out across the CW/SSB portion of the 6 Meter Band. From what I know of this amplifier, it's capable of more. However, because the radio I'm using to drive it (an Icom 746) is known to produce damaging voltage spikes to TE Systems amplifiers.
On receive, the pre-amp makes a genuine difference. I've used it both with the radio's built-in pre-amps and without.
It's impossible to write a thorough review of a piece of equipment I've used only a few times. But, so far, I'm very pleased. 73, Ray, WO2C
DF9CY Rating: 4/5 Aug 3, 2009 05:14 Send this review to a friend
Good little power booster  Time owned: more than 12 months
I purchased this amplifier last year (2008) as second hand for a danish friend, but since then he used it only a few times. Before the 0552G went to OZ, I took it to my RF workbench. The driving transverter has an output power of 25W - exactly what the 0552G wants to see. We measured this with a R&S power meter, which is rated up to 300W and up to 60 MHz. Output power we see is about 240W. Oh, this is low, you may say, but the power supply is only capable of delivering 11,3V at 50A (11,7V with no load). Input SWR of the PA is less than 1:1.2 in any case. At first we thought, one of the transistors may be dead with that "low" output power, but they are all OK. So it must be the low supply voltage, which on the other hand makes operation more robust. Destroyed transistors will be expensive to replace. We added a fan running permanently at low speed and this keeps the heatsink cool even after longer transmission periods.
I am indeed missing some safety circuit especially against high output SWR and overdrive, therefore I can rate this amp only at 4/5.
With a HP8970B noise figure meter I could measure a gain of 19 dB and noise figure of 1,3dB for the built-in receive preamplifier - we do not use it, as in most occasions the surrounding noise is higher.
So if you are looking for a "little power boost" this may be a box for. If you treat it carefully it does its job and lives for a long time.
GL and 73
K9KJM Rating: 0/5 May 23, 2009 00:58 Send this review to a friend
Overpriced junk  Time owned: more than 12 months
Mine NEVER did put out full advertised power, But to make up for that, It smoked the finals
(TE said it was "overdriven") Even cheapo Mirage amps have overdrive protection!

AND the bill to simply check it over will floor you!

I finally got rid of this TE garbage and got a King Conversion SB 220 tube amp that DOES put out REAL power on 6!
W4MAA Rating: 5/5 Aug 24, 2008 10:31 Send this review to a friend
QRO on 6 Meters!  Time owned: 6 to 12 months
I have owned the TE Systems 6 meter PA for about 1 year now and is a compliment to my VHF side of my shack. With around 20-25 watts drive seeing around 190+ watts on RMS!!! Its PEP takes the meter of the scale at over 400 watts. I have also noticed that small bursts of 28 watts drive give you 200+ RMS watts and must be run with a large power supply. I recommend a power supply of 70 amps. The PA is run at around 15v input DC and works very well. I run VHF contests and local dx ragchews 100 miles away with ease with a 3 element beam. I bought it second hand but was checked by TE Systems and got the clean bill of health. I had the smaller 6 meter PA that TE Systems made and worked great also. AM/FM/SSB operation with and adjustable delay can't be beat. Can't wait for 6 meters to come alive if solar cycle 24 ever gets here. A+ 5 rating!
VR2XMQ Rating: 5/5 May 1, 2008 03:39 Send this review to a friend
Great  Time owned: 0 to 3 months
I purchased second hand the TE 0552G RA which is basically the 0552G placed into a 19 inch rack mount with dual blower fans for cont.-duty. The unit was in brand new tip top condition.

I removed the unit from the rack mount and am using it as the basic stand alone 0552G unit and I am very pleased with the performance.

This one is a keeper. The 19" rack moubnt blower has been stored away and may find some other use some day?

73 Steve, VR2XMQ
KI4KVS Rating: 5/5 Oct 5, 2006 11:31 Send this review to a friend
Works as advertised  Time owned: 3 to 6 months
I, also, bought directly from TE Systems. The amp arrived on a Friday, and it was being shipped back the following Monday. I understand "infant mortality" in solid state devices, so I wasn't too upset. It took two months (THAT did make me upset) for the amp to be returned (no charge for the work) - a relay was bad. Since this review is about the amplifier, and not TE Systems' "service", I'll just say that calls were not made, as promised, nor were emails sent, as promised.

The amplifier, itself, works as advertised. If you put a good drive signal into it, you'll get a good signal out of it. If your drive is over modulated, or has any problems, the amplifier does what it's supposed to do, and passes them along - at a much more noticeable level!

Good product, made by what appears to be a good, but very understaffed, company. I've owned it for over three months, but have only been using it for one.
W5WVO Rating: 5/5 May 27, 2006 19:05 Send this review to a friend
Truly excellent amplifier  Time owned: 3 to 6 months
I bought my 0552G directly from TE Systems, as their few distributors seem to be usually out of stock of this highly sought-after unit. Delivery was quick, and the packing for shipment was way into overkill mode. It took five minutes to completely unpackage it! Impressive.

I found the manual to be fairly comprehensive (though being a tech writer, I have pretty persnickety standards for such things). I was able to get it hooked up and working without any glitches.

Performance results have been outstanding. Though TE Systems conservatively rates the unit for 25W of drive (producing 375W output), I found through testing that it will easily produce 450W output with a totally clean signal. Heavy-duty use at this level isn't recommended, but with an outboard muffin fan, it should handle it. I run mine at 400W (27W drive) and it never overheats, no external fan required.

The built-in receive preamp isn't needed in my situation because my external noise floor is way above the internal noise generated in my receive chain. I simply leave it turned off. If you live in an exceptionally quiet place (don't I wish I did!), the preamp would probably be more useful.

Most people who own this amplifier power it with an Astron RS-70M analog power supply, and I'm no exception. This power supply is reviewed separately and is also highly recommended.

I highly recommend this amplifier to anyone.
N3JBH Rating: 5/5 Mar 29, 2006 09:45 Send this review to a friend
simply wonderful  Time owned: 0 to 3 months
Very nice amplifier. Well constructed with excellent manual.
And it includes the accessory plug and crimp on wire connectors. Nothing extra to ever buy.
As far as shipping they packed this amp for war. They sure don't skimp on that. Delivery time was about a week. And I am very happy with them. I will do business with Te systems again. Jeff n3jbh
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