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

Mercury 3S: Up for your consideration is a Mercury 3S amplifier,tha's been well take care of in a non=smoking enviroment. As always I keep all my gear pristine and meticulously maintained. This amp looks great and performs even better. Asking $2 700 shipped ( 13% discount over original price ) to CONUS on the original boxes.; Listing #1760828 - Submitted on 03/03/26 by Callsign WT2D - IP: c-73-107-243-247.hsd1.fl.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
KPA500 RF Remote/Local Power Monitor +: KPA500 RF Remote/Local Power Monitor +

A compact plug-and-play display unit ($199) that connects to your Elecraft KPA500 via RS-232 and shows six real-time readings — Power, Voltage, Current, SWR, Temperature, and Band — on a crisp 256×64 OLED, updating 10 times per second.

It also has built-in WiFi 6, 2.4g and 5g, so you can monitor and control the amp (power on/off, operate/standby, band change) from any phone, tablet, or browser on your network at kpa500.local or worldwide with free program Tailscale. Multiple devices can connect simultaneously. One-time WiFi setup, no app needed, and the display unit works independently even if WiFi is unavailable.

Size: 4"×2"×4" | Power: 9–14.8V DC | Warranty: 2 years; Listing #1760550 - Submitted on 03/01/26 by Callsign KV5J, Modified on 03/03/26, Web Site: http://www.kv5j.com - IP: customer.mmmiflx1.isp.starlink.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
OM Power 2501A: Wow..What an AMP! Just too big for my station. Comes with everything as new, very low use. Includes box and shipping pallet ! Pick up only, can deliver to Belton April 10th.
SN#2115 Tube is FU728F
$4200 Offers Welcomed.. Call with any questions
I do not reply to emails, too many scammers.. Call if interested.
Read all about it: https://www.om-power.com/products/om2501a; Listing #1760796 - Submitted on 03/03/26 by Callsign K5NZ - IP: 146.86.189.175; Click to Contact -- Send this Ad to a Friend
Info needed: has anyone convrtted a alpha 78 to use gi7b tubes.
any info would be a help.
cant afford 3cx400a7 / 8874 tubes
Thanks for any help; Listing #1760794 - Submitted on 03/03/26 by Callsign K2DGR - IP: 160.sub-174-197-192.myvzw.com; Click to Contact -- Send this Ad to a Friend
Wanted Yaesu Amp Part: Wanted a FAS-1-4R for a Yaesu FL-7000 that connects to a Yaesu FT-1000MP Mark V.
Please let me know if you have one of these and are willing to sell it.
Thank you very much for looking at this AD. If you have any suggestions about connecting this another way please let me know. Nick; Listing #1760761 - Submitted on 03/03/26 by Callsign SMITH - IP: syn-035-151-128-032.res.spectrum.com; Click to Contact -- Send this Ad to a Friend
For Sale: Ameritron AL811 with 572Bs: Lightly used Ameritron AL811 amplifier in good operational and physical condition with 811s replaced with 3 matched DX Engineering 572Bs. Used on 40 and 20 meters only. Never driven to more than 350W CW and 400W SSB because my antenna is in my attic. 10/12 meter modification has not been done, but it is a simple "cut the green wire" mod. I will included instructions on this mod. Wired for 120 volts but can be converted to 220 volts by a simple jumper change and replacing the fuses.
This is a heavy piece of equipment, so I would prefer a local pickup. Alternatively I would meet/deliver within 100 miles of Charleston, SC. $650 for either option. Complete with instruction book.
I accept PayPal or Venmo electronic transfers but buyer has to pay fees so I net $650. Otherwise cashiers check or cash.
Thanks for looking,
73
Dave
K4SUE; Listing #1760735 - Submitted on 03/03/26 by Callsign K4SUE - IP: c-174-177-136-68.hsd1.sc.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
30W ShortWave Amplifier Board 3-28MHz: 30W ShortWave Amplifier Board 3-28MHz CW SSB Linear RF POWER Amplifier HF radio HAM short wave station 7M 13.56M RFID Signal
Product sellpoints
Automatic Switchover:Features automatic switchover for optimal performance in various conditions.
Compact Design:60x100mm PCB with a lightweight build, perfect for DIY enthusiasts.
Compact Design:At 60x100mm, this amplifier board is a space-saving solution for DIY projects.
Efficient Power Consumption:Operates on a low 0.1-3W input power, offering efficient power usage.
Efficient Power Supply:Optimized for DC 12-13.8V, ensuring stable operation with low current draw.
brand new unused, $40 shipped, PayPal ok; Listing #1760710 - Submitted on 03/02/26 by Callsign K7IEU - IP: c-73-225-151-127.hsd1.wa.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Elecraft: Wanting to buy an Elecraft kpa500 and matching tuner. Will purchase separately if that is the only way I can get them but prefer to purchase as a combo.; Listing #1760704 - Submitted on 03/02/26 by Callsign KI6CDI - IP: host-148-170-105-242.twlakes.net; Click to Contact -- Send this Ad to a Friend
Ten Tec Titan II QSK Legal Limit 160-10: $2000.
Probably the lowest measured IMD distortion you can get
(see ARRL tests)
160-10 Meters
Legal Limit Plus
Grid Driven 40x power gain
25W in = 1000 W out
QSK
In use here for several years to run West Coast Swap Net on 40M.
Runs Cool and Quiets in heavy traffic handling environment.
I renewed the power supply caps with 5000 hour rated 105C units
( typical life for many types is only 2k hours).
Only reason to sell is a need for money!
I typically run this at 1Kw PEP output... in which service it is rated to run key down continuously any mode 24/7 !
First class engineering and construction.
No cobby crap under pretty paint here.
all the issues you'd expect it you want it shipped.; Listing #1760271 - Submitted on 02/26/26 by Callsign W6WUH, Modified on 03/02/26 - IP: 64-201-115-35.race.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
heathkit sb200 power transformer: working power transformer 95.00 plus shipping
have lots of other parts from sb200 ,meter has been sold no power supply board
let me know what you need; Listing #1759430 - Submitted on 02/18/26 by Callsign WR4F, Modified on 03/02/26 - IP: 46.110.132.26; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend