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HF Amplifiers

Displaying ads 121 to 130 of 255 ads in this category.
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  FS: Johnson Desk Kilowatt Transformer  
For sale is plate transformer for Johnson Desk Kilowatt … T300 … EFJ PN 22.1070 … {Pri} 115/230 Vac 60Hz 1Ph … {Sec} 2900-2325-0-2325-2900 Vac at 600 Ma CCS … good shape for vintage … see picture … ceramic insulators OK … original paint … no shell dents … ohmmeter & Biddle test OK … no evidence of over-heat … made in U.S.A. … heavy iron > 70 lbs … price is $150 pick-up near Asbury Park, NJ 07719 … tnx., Gene

Listing #1745203 - Submitted on 10/05/25 by Callsign KB2GZ - IP: ool-4572ec2c.dyn.optonline.net
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 WANTED: Ameritron AL-811 AMP in W WA
I am wanting a 600 watt HF Amp, like the AL-811.
I know I don't really need it, since 600 watts is just one S-unit over barefoot. But I want to be a member of the QRO club, if only for a bit. And I don't want to pay much.
Shipping an amp is expensive and damage-prone, so I am looking for one for sale near my home in Olympia WA. I am prepared to drive 100 miles to meet up.
So let me know what you have, condition and price. Send pictures. one with a sign in front with your call and date.
73, John K7NFL


Listing #1745110 - Submitted on 10/04/25 by Callsign K7NFL - IP: customer.sttlwax1.isp.starlink.com
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 BTI LK-2000 HF Amplifier   
Great Condition! See the pics showing 1,500 watts out with under 100 watts drive.
Drake wattmeter in 2KW scale. 3-1000 Tube
80-10 meters. Has optional larger factory plate transformer for legal limit out.
Have optional NOS 3-100 tubes too
$1,000 plus shipping or OBO


Listing #1741656 - Submitted on 09/01/25 by Callsign KL7AM, Modified on 10/04/25, Web Site: https://kl7am.com - IP: 92-99-35-72.mtaonline.net
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 Emtron DX2SP HF Amplifier  
Great condition!
Very reasonably priced tubes if you need one (FU-728F) Can also use a 4CX1500
I owned this amp for a time after I bought from an estate and it worked well. later sold it to a friend who had it for several years.
Friend recently passed and I bought it from the estate and it works great! No issues in the time we have owned it.
Legal Limit+++
I have a good extra tube available too
$2,500 shipped/insured US in two boxes. Crate for Transformer and a large box.


Listing #1744810 - Submitted on 10/01/25 by Callsign KL7AM, Modified on 10/04/25, Web Site: https://kl7am.com - IP: 92-99-35-72.mtaonline.net
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 FS: OM Power OM4000A  
Selling my OM4000A as solid state amps better suite my operating style.
The OM4000A is just back from OM Power's U.S. service center, and has had two new tubes matched by OM Power installed. It is in excellent condition with now scratches or other issues. Inside, it is bright and shiny, and is a joy to look at.
To give you a sense of the overhead this amp has, into my Alpha 2000 dummy load, I measured the following with an LP-700 wattmeter:
160m 9.1 in/801 out 13 in/1299 out / 17.1 in / 19.5 out / 25.1 in / 3268 out
10m: 12.5 watts in/2012 watts out.
Included with the amp is the OM4000A remote control unit, which allows you to turn it on/off, put it in standby/online, and also displays the power. Additionally, there is an embroidered cover to keep it dust-free. The original box and packing materials are included also.
$6300 - get it before the tariffs kick in. An OM4001A (the successor to the OM4000A) is currently $9,300 at DXE.
Thanks!


Listing #1738827 - Submitted on 08/07/25 by Callsign NN4X, Modified on 10/04/25 - IP: fl-71-52-107-241.dhcp.embarqhsd.net
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 WTB
FACE PLATE FOR AL-811, USED. SCRATCHES NOT A PROBLEM, JUST NEEDS TO NOT BE BENT IN ANY MANNER. GOOD ON QRZ. 73'S MIKE W4MCX

Listing #1745084 - Submitted on 10/04/25 by Callsign W4MCX - IP: c-174-48-83-42.hsd1.fl.comcast.net
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 FS/Trade Collins 204F-1  
I am selling my Collins 204F-1 amplifier. This amplifier uses a pair of 4CX-1000 tubes. It will tune 2 to 30 MHz continuous. Collins reports the duty cycle as 24/7, at 2.5 KW. This amplifier is in very good condition. It was built for the military with heavy duty components, and vacuum relays. Much better built than anything sold in today’s market. No displays, IC’s or proprietary software that becomes unobtainable. There is a lot of information on the internet on this amplifier. Pick up in Northwest Oklahoma. It is big and heavy. Sold as is, working. Selling for 3000.00. I would also consider a trade for a good working Solid State amplifier. Looking for a Tokyo Hy-power, Elecraft Kpa-500 or Mercury. Cash, ZELLE, USPS money order accepted. Funds would need to clear my bank before the amp would be released. Mason, K5yhx. 214 293-4050. More pics on request

Listing #1744301 - Submitted on 09/26/25 by Callsign K5YHX, Modified on 10/04/25 - IP: 172.59.125.88
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 ALS-500 power plug.FS
Just what it says.I have a ameritron als-500 power plug.This mmay fit other ameritron amps,I don't know.The leads have been cut short as there was larger power cable run to the amp.There's about a foot left.Asking $50.00 shipped..73 thanks,john

Listing #1745054 - Submitted on 10/03/25 by Callsign W5JMW - IP: syn-067-010-096-041.res.spectrum.com
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 ALS 600 Ameritron solid state amp  
ALS 600 Ameritron amp. 160 through 10 meters. Currently wired for 110 volts, but can be wired for 220 volts. Asking price $995.00. Recently checked out by professional electronic tech and is working as new. Will not ship. Deliver, pickup, or meet withing reasonable distance. If not sold online, this will be available for sale at the Belton Hamfest in October. All sales final.

Listing #1744066 - Submitted on 09/24/25 by Callsign K5MV, Modified on 10/03/25 - IP: 173-47-255-44.cpe.cableone.net
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 ALS 1300 Solid State Ameritron Amp  
Will not ship. Meet, deliver, or pickup only. Amp is working in perfect condition. Recently gone through by professional electronic tech. 1200 watt 160 through 10 meters set wired for 220 volts but can be wired for 110. Asking $1,950.00 for the ALS 1300 Ameritron amp. All sales are final. If not sold online this will be available at the Belton Hamfest in October.

Listing #1744062 - Submitted on 09/24/25 by Callsign K5MV, Modified on 10/02/25 - IP: 173-47-255-44.cpe.cableone.net
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