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Comet CAA-500 Mark II Commercial Grade SWR/Impedance Analyzer
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HF Amplifiers

Displaying ads 21 to 30 of 208 ads in this category.
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 Pair of Big Amps (Orlando specials)
1. Alpha 6 amp...this is real Big Boy power on 6 meters. Uses the 4CX1600B tube and will give Alpha power at 1500 watts all day long. Radio and manual for pick up here in 30223. Get it on your way to or from Orlando Hamfest. Price is $2500 pick up in person.
2. OM Power 2000+. Here is another Big Boy Amp! 1500 watts all day on 160-10 meters. I used it exclusively on 6 meters. But it goes from 160 thru 6 meters, with manual tune up. This one is priced to go...you will not find another at this price or this clean. $2600 pick up in 30223.
If you are heading to Orlando I am home Wed the 11th and Mon the 16th after Orlando. Give me a call and lets talk.
de Rick NQ4I cell 678-595-6235


Listing #1758218 - Submitted on 02/07/26 by Callsign NQ4I - IP: c-73-207-79-89.hsd1.ga.comcast.net
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 RM Italy HLA305V  
RM Italy HLA-305v HF amplifier in excellent condition. This amplifier is ideal for low power HF transceivers (< 10w) to get about 200w out. This was used with a Hermes Lite 2+ SDR and Square SDR, which are ~5w output.
DX Engineering is selling these new for $860. I'm asking $550 shipped in the continental US. I prefer Zelle or Venmo for payment or cash if picking up in SW FL. I'll also be at Hamcation in February. I'll gladly discuss via phone for extra assurance. No returns.
Tom WB9HKO


Listing #1758186 - Submitted on 02/07/26 by Callsign WB9HKO - IP: c-76-148-88-239.hsd1.fl.comcast.net
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 FOR SALE: Dentron Clipperton-L Amp  
Dentron Clipperton-L HF Amplifier. Good condition. Includes 10m modification. Manual also included. Wired for 240 VAC operation (or "234 VAC" as the manual says). Age of 572B tubes is unknown, but they are showing signs of age with somewhat lower output power than new tubes. Measured power into dummy load:
1.815 MHz 400W
1.915 MHz 425W
3.515 MHz 500W
3.875 MHz 500W
7.015 MHz 700W
7.250 MHz 750W
14.015 MHz 700W
14.300 MHz 725W
21.015 MHz 750W
21.400 MHz 750W
28.015 MHz 600W
28.600 MHz 600W
Amp is heavy - will not ship. Pick-up ONLY within SE PA/South Central PA/SNJ/Northern DE/NE MD areas.
Can deliver at VWA Winterfest on 3/15
Asking $500 cash or PayPal.


Listing #1758168 - Submitted on 02/07/26 by Callsign N3NR - IP: c-73-81-13-93.hsd1.pa.comcast.net
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 FOR SALE: ETO-Alpha 78 Amplifier  
Alpha 78 S/N 8824. Excellent condition. Age of tubes unknown. No sticky paint. Has 10m modification only. Includes manual. Features Bandpass preset for 80m - 15m (CW/Phone sections). Manual tuning on 160m and 10m, as well as 80m - 15m.
Measured Pout (Pin 65W, Dummy Load, Ig<50 mA):
Frequency, Pout Manual, Pout Bandpass
1.815 MHz, 1033 W
1.915 MHz, 1029 W
3.515 MHz, 1038 W, 500 W
3.875 MHz, 1037 W, 570 W
7.015 MHz, 1075 W, 579 W
7.25 MHz, 1052 W, 599 W
14.015 MHz, 1120 W, 626 W
14.3 MHz, 1104 W, 696 W
21.015 MHz, 1027 W, 507 W
21.4 MHz, 1068 W, 769 W
28.015 MHz, 1031 W
28.6 MHz, 1082 W

15m Gain 11.92 dB.
Pick-up ONLY SE PA/South Central PA/SNJ/Northern DE/MD/NoVA areas. Can deliver at VWA Winterfest on 3/15.
$1200 cash or PayPal.


Listing #1758166 - Submitted on 02/07/26 by Callsign N3NR - IP: c-73-81-13-93.hsd1.pa.comcast.net
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 Ameritron ALS-1300  
Pending sale.
I have from an ESTATE , A working ALS-1300. Just fully dummy load tested on all bands 1kw plus output.
Has 10m board.
Requires 240- volts.
I have the box for the amp, but not for the power supply.
Amp does have a few scratches and scuffs.
Can send pics upon interest.
This is pick up only.
Asking $1500.00


Listing #1758015 - Submitted on 02/05/26 by Callsign KW4LN, Modified on 02/07/26 - IP: 50.25.154.237
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 Palstar LA-1K Amp wanted
Looking for Palstar LA-1k Amplifier in mint condition, full output, no scratches or scuffs. Prefer original double boxes. Please send pic as there have been several models of these and the logo position has changed. Also send first 4 digits of serial number please. Contact me through here at QTH.COM. Also send phone number. I cannot do business with anyone who will not provide their phone number (cuts down on scammers, of which I've had many answering this ad.) Thanks

Listing #1758153 - Submitted on 02/07/26 by Callsign KK8ZZ - IP: ec2-13-58-69-202.us-east-2.compute.amazonaws.com
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 Alpha 76a   
I have here a really nice alpha 76a that has been converted to 3cx800a7's .
The tubes MIGHT have 5 hours talk time on them . This amp has had 6:1 planetary drives installed on both load and tune controls for easy tuning . It has had the low drive modification performed .plate current meter doubling shunt .the Wattmeter upgrade . Plus the 10 meter mod . All modifications were performed by dick byrd . Price is $1800.00 plus shipping or it can be picked up at the dalton hamfest . I might even do some trading if you have something that REALLY catches my eye . This is a really nice amp . If treated right it should be the last amp you'll ever have to buy


Listing #1758134 - Submitted on 02/07/26 by Callsign KG4WPW - IP: 47.sub-174-218-57.myvzw.com
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 Heathkit HF Amplifier w 2X3-500 Tubes  
One used Heathkit H.F. Amplifier, the SB220 using two of the 3-500 tubes
currently wired for 120VAC and can be change easily to 220 VAC. Keying
was modified for low voltage keying. For sale at $915.00 plus shipping.
Preferred local pickup in Southern California. I am good on QTH call sign lookup
as W6BBA and address is current. If local pickup with cash, I will include Free,
the Heathkit Power/SWR meter shown in the picture!, that is worth $150! A
bargain, so I don't have to ship it! Thanks for looking at my ads. 73's


Listing #1758132 - Submitted on 02/06/26 by Callsign W6BBA - IP: 104-11-235-174.lightspeed.irvnca.sbcglobal.net
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 Amp Supply LK500ZC 1 KW 160M-10M $800  
The amp is an early model and does not have the WARC bands. It runs a pair of Amperex 3-500s. It will load up on 17 m with 700 watts out with no difficulty when the band switch is on 14 M. The ALO board has failed and has been bypassed. The ALO circuit was designed to detect unsuitable loading conditions and shuts down the amp. Despite this, the amp operates as expected. A new rectifier board (new caps, diodes, resistors) has been installed. High voltage is 3000+ VDC. The amp is in excellent physical condition – no dents, minor hairline scratches. The photo shows 1 KW output on 14m. More photos on request. Shipping options: free pick up in Boulder CO or I will drive up to 3 hours from Boulder CO to deliver the rig for $75 or buyer makes his own shipping arrangements at his expense. Because of the amps’s weight and possible damage during shipping, I will not box up the amp and ship it but will deliver it to a local shipper. $800 Cash or USPS money order only.

Listing #1757872 - Submitted on 02/04/26 by Callsign N3AJB, Modified on 02/06/26 - IP: c-73-243-93-108.hsd1.co.comcast.net
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 Amp Supply LK550 (3) 3-500Z amp
Selling my amp supply LK550.. 160-10M keeps blowing one of the fuses with all the tubes out sold as is. Peter Dahl plate and filament transformer. 2 out of the 3 eimacs are ok and included with the sake. I will not ship but will meet in Massachusetts to deliver. Email me for pics . This is a 2 piece unit.. $1500

Listing #1758122 - Submitted on 02/06/26 by Callsign W1CJF - IP: 151.240.45.96
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