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 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; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
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; Click to Contact -- Send this Ad to a Friend
QRO-2000 w/ New Penta tubes: QRO-2000 in perfect condition. Brand new Penta 3-500ZG tubes installed 1/14/25. The amplifier works as it should. Come try it out or will ship at buyers expense in three boxes. $2000 OBO. Also have a FT-2000 listed separately that I will make a deal on together.; Listing #1756131 - Submitted on 01/18/26 by Callsign W4EKY, Modified on 02/06/26 - IP: 170.85.92.202; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
keying module two amps /replacesARB704: $80.00 plus shipping Paypal Zelle
will key older high voltage/modern low voltage amplifiers this is a low input ptt one transceiver to two amplifiers will key two modern or older amps no cable swamping. safe full isolation PTT optocoupler 100% electrical isolation from your modern radio. 12vdc operation has standby switch. comes with power pigtail. will work great in line with your Ameritron ARB704 RCA jumper from ARB704 to the RK102 now you equipment is safe and isolated. you can mix and mach old and new amplifies; Listing #1758093 - Submitted on 02/06/26 by Callsign KJ6VRC, Web Site: https://www.qrz.com/db/KJ6VRC - IP: customer.snjecax1.isp.starlink.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Ameritron ALS-600 Amplifier: Ameritron ALS-600 Amplifier. Rated 160-15M, 600 watts PEP, 400 watts CW. I do not believe this one has the 12-10M modification, but have not opened it to check (the AUX position is silent on receive, indicating that the mod has not been installed). Amp works and and appears to be operational, but sold as is. $925 net to me. Will ship at your cost, or pick-up in St. Louis, MO. US only. Lou, W0FK; Listing #1758075 - Submitted on 02/06/26 by Callsign W0FK - IP: syn-071-085-210-083.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
SPE Expert 1.5K: Selling my Expert 1.5K It works very nicely. 10 will get you 500, 20 about a 1k, and 28 about 1.4ish. It has a very nice tuner built good for about 5:1. The antenna switching can handle 4 antennas and two radios, along with a receive antenna. I'm sure you know what they look like, but feel free to email for pics. I will not respond to anyone who doesn't include their valid call on the email.
Asking $4400 shipped.
Thanks, 73
Tony N7ZS; Listing #1758017 - Submitted on 02/05/26 by Callsign N7ZS, Modified on 02/05/26 - IP: 104-181-75-17.lightspeed.renonv.sbcglobal.net; Click to Contact -- Send this Ad to a Friend
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.
The variable cap, both sockets, both door knobs, and all knobs have been sold.; Listing #1757847 - Submitted on 02/03/26 by Callsign VA5DX, Modified on 02/05/26 - IP: 45.42.128.159; 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 #1757951 - Submitted on 02/05/26 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
LDMos power supply: I have two new LDMOS power supply units . I am asking $130 each shipped. Thanks; Listing #1752945 - Submitted on 12/17/25 by Callsign KB4HL, Modified on 02/04/26 - IP: 185.126.82.202; 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