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

FOR SALE: Parts from a SB220 6m convers: Parts salvaged from a Heath SB 220 6 meter conversion. Contact me for prices. PayPal friend to friend, check or cash. If ad is up the parts or some of the parts are still available.; Listing #1757847 - Submitted on 02/03/26 by Callsign VA5DX - IP: 45.42.128.159; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Ameritron ARB-704 Amp-Radio Interface: Read more here: https://mfjenterprises.com/products/arb-704
I have two of them in Excellent condition.
Buy ONE for $85 Shipped.
See picture:
Email/Text/Call: (Tree 86) Tree 4 Won - Zero 9 Won Ate. I can also deliver them to HamCation Orlando-13-15 February.
Best 73,
Felix - W2GI; Listing #1757008 - Submitted on 01/27/26 by Callsign W2GI, Modified on 02/03/26 - IP: syn-071-047-030-242.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Heathkit sb220 lots of mods.: Vacuum relay. Circuit grounded. 24vdc at keying circuit. Was told it has the Peter Dahl transformer and new tubes. 40w in got me legal limit. Im going solid state. 2k FIRM. NO TRADES. Will ship on your dime. I will box it to save you some money. If you want to send pirate shipping label, I will accommodate or ship ups. No returns due to parts swapping. This thing already has the mods you want! Small white stuff on knobs will 100% come off. 25811 WV. If using paypal, buyer is responsible for fee.; Listing #1757482 - Submitted on 01/31/26 by Callsign W8LDX, Modified on 02/03/26 - IP: 50.26.159.129; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
DX World 160 thru 6meter DX500 ZEUS: i have an as new DXworld Electronics Zeus DX500 HF Amp. Covers 160 thru 6 meter solid state HF Amp. It will come with a power supply. You can control this amp over the internet. I am asking $1400 and will ship and Insure.; Listing #1757783 - Submitted on 02/03/26 by Callsign KB4HL - IP: c-71-207-177-122.hsd1.al.comcast.net; Click to Contact -- Send this Ad to a Friend
Need help with THP -1.5 KFX not keying: My THP AMP stopped keying with my IC7800. The amp tracks band changes, fan working, no fault LED’s on, cables connected not loose. Could the issue be an internal fuse, bad transistor on relay/PA board. Problem started suddenly.
Does anyone know a ham who works on these THP amps? I live near Philadelphia.
Any advice would bee greatly appreciated. Thanks
Bob
K3SRO; Listing #1757751 - Submitted on 02/03/26 by Callsign K3SRO - IP: pool-108-16-253-90.phlapa.fios.verizon.net; Click to Contact -- Send this Ad to a Friend
Extended Display for Elecraft's KPA500: Extended 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:

1. Power amplifier's heat sink temperature
2. Power amplifier's high voltage supply voltage
3. Power amplifier's current
4. Power amplifier's output power
5. SWR that the KPA500 sees at its output
6. Operate or Standby mode
7. Band amp is tuned to

All cables supplied. Easy setup.

Newest Hardware and Software. $169 plus $10 shipping.

Last one this batch.; Listing #1756522 - Submitted on 01/22/26 by Callsign KV5J, Modified on 02/03/26, Web Site: http://www.kv5j.com/store/product/digital-display-for-elecrafts-kpa500-amplifier - IP: customer.mmmiflx1.pop.starlinkisp.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE Ameritron 811 H w/ manual & cor: I am offering for sale a ameritron 811H
Very low hours, no pets, no smoke. Works as it should. No scratches or dents. Will not ship but will meet you part way. I live in the Houston area. I will send pictures by text to your phone if you want. Asking $800.00 cash or postal money order. You can reach me at 281 630 3938 any time after 12:00 noon. Thanks Gene; Listing #1757717 - Submitted on 02/02/26 by Callsign N5ROE - IP: 47.221.93.212; Click to Contact -- Send this Ad to a Friend
FOR SALE- AMERITRON ARB-704: MFJ ARB-704 Radio to Amplifier buffer interface. This was being used with my IC-7300 that I no longer have, but can be used with most any Radio. $50.00 CASH OR WALMART MONEY ORDER. SHIPPING POSSIBLE If Buyer pays. Any Questions just ask.; Listing #1757714 - Submitted on 02/02/26 by Callsign W3IDX - IP: c-67-172-16-111.hsd1.pa.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Mercury Lite WANT TO BUY: Want to buy a Mecury Lite Amp. Someone mayby moving up and have one to part with? Only contact me through this site to discuss what you have.
Thanks Jerry; Listing #1757703 - Submitted on 02/02/26 by Callsign K9JJJ - IP: 208.157.188.31; Click to Contact -- Send this Ad to a Friend
FOR SALE: Sprauge Capacitors: Have 8 sprauge 200UF 450 volt NOS capacitors never installed $60.00 plus shipping USA only personal check or postal MO; Listing #1756070 - Submitted on 01/17/26 by Callsign N8SST, Modified on 02/02/26 - IP: syn-184-057-230-179.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend