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

Amp Supply LK500ZC 1 KW 160M-10M $800: The amp is an early model and does not have the WARC bands. 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. 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 - IP: c-73-243-93-108.hsd1.co.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
looking for Palstar. LA-1 Mint: Looking for Palstar LA1 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. Thanks. Bob KK8ZZ; Listing #1757062 - Submitted on 01/27/26 by Callsign KK8ZZ, Modified on 02/04/26 - IP: ec2-3-142-173-106.us-east-2.compute.amazonaws.com; Click to Contact -- Send this Ad to a Friend
Information quest - QRO HF-2500DX: Information quest - QRO HF-2500DX
Trying to find the correct compression capacitor for the 10 meter tuned input section for a QRO HF-2500DX. I know it is an Arco 400 series, maybe 426 or close to that. It's not in manual or schematic. If anyone has one apart or ? and can take a look maybe?; Listing #1757854 - Submitted on 02/04/26 by Callsign K9RLB - IP: 172.56.248.207; Click to Contact -- 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
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
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