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HF Amplifiers

Displaying ads 1 to 10 of 269 ads in this category.
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 SGC SG-500 HF Mobile Amplifier   
SG-500 Power Cube 500-watts HF mobile amplifier. Has cooling fans and remote factory options. This one is putting out a full 600 +watts with 55 watts drive on 75 meters This amplifier needs a full 100 amp 13.8 volt supply to operate at full power. $1500 shipped FedEx. PayPal or Zelle

Listing #1748088 - Submitted on 11/01/25 by Callsign WB1AFK - IP: mobile-107-77-224-56.mobile.att.net
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 Relays REV-15 75oHm 1500watts to 650mHz  
Hi everybody!
Selling absolutely NEW REV-15 relays factory packed at a price of $30 per one. Number of relays (more than one or four together) weighing up to 1Kilo parcel shipping costs will be ~25$(to U.S.A.) by Nova Poshta, with insurance and tracking number. Relays absolutely new, working voltage is 24-27Volts, supports 1500 Watts of power until 650MHz, minimal life 12 years when working in any device. There are needed number of new relays for sale. When purchasing a quantity (more than 5 pieces), a discount is possible by agreement. Payment on Pay-Pal ut5rp at te.net.ua Discount is possible! All questions buying and payment by E-Mail or tel/Viber +38 067 699-17-05 Thanks for reading ad and for a possible purchase for offered price, it will help me a lot in this very difficult time for me as for pensioner with monthly pension less than 100$US. See my other ads.
73's de Dmitry UT5RP


Listing #1748083 - Submitted on 11/01/25 by Callsign UT5RP - IP: 188-163-101-184.broadband.kyivstar.net
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 Vacuum high voltage capacitors  
Hi everybody!
I will sell vacuum capacitors according to the following list and contractual prices close to the prices of the store for each item and even lower ~20$US each. Payment on Pay-Pal ut5rp at te.net.ua With questions about price, payment and forwarding by e-mail or phone/Viber +380 67 699-17-05 Price maybe yours, offer!
25pF x 15kV 3pieces
50pF x 15kV 4piece
100pF x 10kV 1piece
200pF x 15kV 1piece
Thank you for reading the ad and a possible purchase for offered price, it will help me a lot in this very difficult time for all of us here in Ukraine.
73's de Dmitry UT5RP since 1959


Listing #1748081 - Submitted on 11/01/25 by Callsign UT5RP - IP: 188-163-101-184.broadband.kyivstar.net
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 FS:Ameritron 811H 160-10M   
Excellent Condition Ameritron 811H HF Amp. Has 10M mod done by me!
4 Brand New Penta 811 matched set of 4 Tubes just installed. I have the original 4 included as well. They were ok but wanted fresh tubes installed. I bought this from a friend who was selling a SK Estate. This is a later Amp, and works 100%. Super clean inside and out. 120V
$900.00-I can ship if needed, PayPal OK
73!
AA9NN


Listing #1748065 - Submitted on 10/31/25 by Callsign AA9NN - IP: 107-196-191-77.lightspeed.cicril.sbcglobal.net
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 Elecraft KPA-1500   
Elecraft KPA-1500 in EXCELLENT Condition
Extremely Low Use!
Original DC Interconnecting DC Power Cable with Anderson Power Connectors
Original 10.5' Interconnecting Serial Interface Cable
Original Owner's Manual
Save a ton $ of dollars!
Priced at $5500 shipped and insured!
I accept most forms of Digital Payment!
Cash in hand or can accept any credit or debit in person
at my QTH when picking up.
I will ship anywhere in the world.
Just ask and understand international shipping rates and customs declarations
Thank you,
Len N2LEN


Listing #1748050 - Submitted on 10/31/25 by Callsign N2LEN - IP: 147.124.143.119
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 Display Unit for Elecraft's KPA500  

The Digital Display Unit for Elecraft's KPA500

A compact, easy to read KPA500 Digital Display Unit (DDU). It allows the monitoring of five crucial readings all at the same time.

The DDU measures only 4X4X2 with an easy to read 2 line display that can be located at the operating position and the KPA500 located up to 100 feet away.

The DDU is designed with the following features:

Easy to read 2 line display
No USB or serial cable to computer
No com port in Windows to manage
No computer needed
Plug and Play
Simply connect the supplied DC power cable to power supply and PC data jumper cable to the KPA500
Retains all functions of the KPA500 front panel
All displayed info obtained directly from the KPA500

Last Unit. Displays are being retired soon.

Newest Hardware and Software. $199 plus $10 shipping.



Listing #1747887 - Submitted on 10/30/25 by Callsign KV5J, Modified on 10/31/25, Web Site: http://www.kv5j.com - IP: 172.59.222.187
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 Heathkit SB-221 HF Amplifier  
Very nice condition with full output Eimac 3-500 tubes.Currently wired for 120 volts and can change for 240. Has soft key installed.$1,050 Shipped and Insured in the US
See my Excellent feedback here:
https://chat.qth.com/search.php?keywords=kl7am&sid=9b20a9b549471833b3fede8bf65b3bc3


Listing #1744289 - Submitted on 09/26/25 by Callsign KL7AM, Modified on 10/31/25, Web Site: https://kl7am.com - IP: 92-99-35-72.mtaonline.net
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 Drake L-4B & L-4PS  
Excellent condition
Rebuilt Power Supply/Filter Capacitors
Soft Start Module
Soft Key Module
Very strong 3-500 Eimac tubes
Non smoker owned
$1,050 + $100 Insured shipping US


Listing #1744058 - Submitted on 09/24/25 by Callsign KL7AM, Modified on 10/31/25, 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 still works great. No issues in the time we have owned it.
Legal Limit+++
Eimac cCX1000 and 4CX1500 tubes can also be used in the amp and will include a tested 4CX1000 in the sale.
I have a good extra original type tube available too
$2,500 shipped/insured US


Listing #1747199 - Submitted on 10/23/25 by Callsign KL7AM, Modified on 10/31/25, Web Site: https://kl7am.com - IP: 92-99-35-72.mtaonline.net
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 Kenwood TL-922A HF Amplifier For Sale  

Kenwood TL-922A HF Amplifier For Sale:
-
The Kenwood TL-922A HF linear amp utilizes
two 3-500Z high performance transmitting tubes,
covering 160 thru 10 meters.
The amp features two analog meters for maximum
operating convenience. Power is 2000W PEP SSB,
1000W DC CW/RTTY input. Drive power is 80 or
more watts.
-
Power requirement: 110/120V 28A or 220/240V 14A.
15.4 x 7.5 x 16 inches, 68.3 lbs.
-
This one has had its capacitors replaced, with soft
start, soft key, glitch resistor, and protection
diodes added. Everything to bring it up to date.
-
Everything works as it should. The tubes are in
good shape. Cosmetically, it is fine.
-
Buy this unit with manual for $1200. Pick up
near Ocala FL is preferred, as shipping would
be difficult and very expensive.
-
Thanks. 73,
Ken Simpson, W8EK
Voice Phone (352) 732-8400
.


Listing #1748012 - Submitted on 10/31/25 by Callsign W8EK - IP: 50.226.0.8
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