QTH.COM Ham Radio Classified Ads: AMPHF - Swap amateur radio HF VHF equipment buy sell trade on line

Palstar LA-1K amplifier: I have a like new Palstar LA-1K amplifier for sale. Includes 220v and 110v power cables, manual and original boxes. Can deliver to Dayton on Saturday for I person pickup or happy to ship on your dime. Asking $2900. Located in Ashland Ky. Happy to send photos for those interested.; Listing #1767639 - Submitted on 05/10/26 by Callsign KZ4ML - IP: 72.158.228.21; Click to Contact -- Send this Ad to a Friend
KPA500 RF Power Monitor: KPA500 RF Power Monitor — Real-Time OLED Display for Elecraft KPA500

Six critical parameters, always visible, updating 10×/second on a high-contrast 256×64 OLED. No menu cycling. No squinting.

Monitors: Power Output (0–700W) · PA Voltage · PA Current · SWR · PA Temperature · Band + Operate/Standby

3×2 grid layout — large fonts sized for quick reading across the shack.

Direct RS-232 integration via MAX3232 — no amplifier modification required.

Specs: XIAO ESP32-C3 · SSD1322 256×64 OLED · 9–14.8V DC · 100mA · 10 Hz update rate · 4″ × 2″ × 4″

Bonus: Built-In WiFi for remote use — web interface mirrors the OLED with a retro green-on-black aesthetic, updated via WebSocket. Includes Power, Operate/Standby, Fan Speed, and Band controls plus OTA firmware updates. Access via kpa500.local — no app required. OLED operates independently of WiFi at all times.

Includes: Assembled & tested unit, DC power cable, RS-232 cable, quick start guide.

--$229 plus $10 shipping; Listing #1767261 - Submitted on 05/06/26 by Callsign KV5J, Modified on 05/10/26, Web Site: http://www.kv5j.com - IP: mobile-107-77-201-55.mobile.att.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Michigan - Amplifier Wanted: Time to find an amplifier in the L.P. of Michigan - what do you have?
Looking for:
- tube finals, 3-500z a favorite.
- complete & working unit, not really looking to buy one already in need of repair unless the issues are very minor and factored into the sale price.
- Rather than look for legal limit+, I would rather find something on the overbuilt side that could ease along at ~600W-1KW. Duty cycle durability stands over P.E.P. as I would like this amp to stay with me for the coming decades and build/component quality are my top consideration but please let me know what you have.
- A homebrew or retired commercial unit that meets the previous critereon would be considered just as much as one sold initially for the amateur market. Rack mount a plus.
Please be willing to drive/meet within reasonable distance of West Michigan. This is to avoid the risks of shipping. After 25 years of holding a license, it finally feels like the right time to adopt an amp.
Thank you!
Mike W8BUS; Listing #1767591 - Submitted on 05/09/26 by Callsign W8BUS, Modified on 05/10/26 - IP: 138.sub-174-245-17.myvzw.com; Click to Contact -- Send this Ad to a Friend
WTB Icom IC-4KL: Want to buy Icom IC-4kl amp in any condition.
Please provide details, pictures.
Thank you,
Pedro
WX2CX; Listing #1767593 - Submitted on 05/09/26 by Callsign WX2CX - IP: ool-44c0ddda.dyn.optonline.net; Click to Contact -- Send this Ad to a Friend
Hunter Bandit 2000A Amplifier: **********
Have very nice cosmetically Hunter Bandit 2000A Amplifier .... part of an Estate Sale and supposedly works fine. I have no reason to believe otherwise but I have not tested it ... it is set up for 120volts but again - not tested.... if you feel inclined I would sell this one as a parts radio that hopefully works fine.
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$310 plus shipping $58
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Payment via ZELLE, M.O. or personal check when clears.
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Note: more of my items-put my call in SEARCH and click SEARCH
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Thank you,
Tom Stack - WQ5J -
tom.stack102443 at gmail.com
**********; Listing #1767587 - Submitted on 05/09/26 by Callsign WQ5J - IP: 104-53-68-31.lightspeed.rcsntx.sbcglobal.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Harris RF104 HF Amp: 2.0 thu 30 MHz continuous. Eimac 3-1000Z. Legal
Limit. Literature indicates it can be moded to cover the entire 160M. Designed as a ship board at 275 lbs and well built. Motor driven variable. Pick up or will meet a reasonable distance from Tampa. Manual and cable. $500.00 firm. Also a mostly complete second parts RF104 available w/o tube for $100.00.
Cliff W4NJ; Listing #1767429 - Submitted on 05/08/26 by Callsign W4NJ, Modified on 05/09/26 - IP: 172.56.97.32; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Ten Tec Centurion: i have a real nice condition TenTec centurion hf amp. Amp operates on 220volt. 2 3-500z. i am located in east Tennessee. 900.00. k4tue, rickvassark4tue at gmail.com. 423-623-5899; Listing #1767559 - Submitted on 05/09/26 by Callsign K4TUE - IP: 107-196-93-8.lightspeed.knvltn.sbcglobal.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS: New MACOM MRF-422 matched: New MACOM MRF-422 matched transistors. ASI MRF422 is Designed for 2.0 MHz to 30 MHz, 28 V High Power Linear Amplifier Applications. RF422MP Asking $150 each pair plus shipping. https://www.kynix.com/Detail/1314417/MRF422.html?gclid=Cj0KCQiAvqGcBhCJARIsAFQ5ke5OgDTFiJ3lDEfE-Z-FNAziV4EX7aPa5olk-Klx5rSqwE_LADKsBagaAqa3EALw_wcB; Listing #1767519 - Submitted on 05/09/26 by Callsign W1JCW - IP: 23-92-13-217.wirestar.net.wirestar.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
For Sale Ameritron AL 811H Amplifier: Amp is from a local SK estate.
Has had the 10 Meter mod done . So 160-10 Meters
Comes with asset of Penta-Labs tubes in the their boxes and the original tubes in the amp now.
Amp is working as it sure as I have been using it on 40 and 80 meters every day for 2 weeks. I added protection diodes to the meters.
I’ll throw in a dual RCA cable for PTT / LC hook-up
Prefer local P/U or delivery with –in 1-2 hours of my QTH (w help for fuel ) $700
Shipping is possible at your expense.
Fred AI3Z at comcast.net
443-223-5142 Lv Message; Listing #1767492 - Submitted on 05/08/26 by Callsign AI3Z - IP: c-71-200-139-47.hsd1.md.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Ameritron AL-811 600-watts HF amp: I have for sale this nice working 600-watts 160-10m AL-811 amplifier.
Price is $550
Prefer local pickup.; Listing #1766276 - Submitted on 04/27/26 by Callsign K2ZZ, Modified on 05/08/26 - IP: 104.28.172.150; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend