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KPA500 RF Power Monitor +: KPA500 RF 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, 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. Multiple devices can connect simultaneously. One-time WiFi setup, no app needed, and the OLED works independently even if WiFi is unavailable.
Size: 4"×2"×4" | Power: 9–14.8V DC | Warranty: 2 years; Listing #1760196 - Submitted on 02/26/26 by Callsign KV5J, 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
Wanted-QRO Amplifier Model HF3KDX-8877: Thanks for reading this-Specifically Looking for a QRO Amplifier Model HF3KDX with the 8877 Tube. Want to buy. Any leads on this amp appreciated. Kind Regards; Listing #1760168 - Submitted on 02/26/26 by Callsign N3ZS, Modified on 02/26/26 - IP: 170.85.73.85; Click to Contact -- Send this Ad to a Friend
ACOM 2100: As new one owner amp no marks dents or dings amp was just sent to bill grassa for a clean bill of health the antenna relay was replaced as recommended by bill certified Acom repair center amp is 15 months old have videos 3750 Certified bank cashiers check only no PayPal no Zelle thanks buyer pays shipping or will meet within 100 miles of my qth; Listing #1760122 - Submitted on 02/25/26 by Callsign NC4JS, Modified on 02/26/26 - IP: syn-047-038-104-193.res.spectrum.com; Click to Contact -- Send this Ad to a Friend
Ameritron ALS-600,ALS-606 Amplifier: ALS-600 With 10,12 meters installed.Ameritron-600PS Power supply.$1350.00.ALS-606 With Ameritron 50 volt switching power supply.$1850.00 The prices include the shipping charge lower 48 USA. The Amplifiers work well with a resonate antenna.Will accept USPS Money order or personal check.All sales are final no returns Thanks; Listing #1760177 - Submitted on 02/26/26 by Callsign KU4I - IP: c-71-62-192-53.hsd1.va.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Icom PW-1 Amplifier: Excellent condition, no issues, full power out. From an estate. Currently wired for 220V, but can be easily switched over to 120V if desired. Built in tuner. Auto band switching, 1000W. Amp supports 160m to 6m.
Pick up only in Sacramento, or can meet in SJ, SF or Reno/Tahoe. $2900 or best offer. Good on QRZ.; Listing #1760161 - Submitted on 02/26/26 by Callsign K1FIE - IP: 12.47.128.137; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Complete Flex 8600 w/GPSDO PGXL and TGXL: I have a complete working very good FLex 8600 and the power house amplifier PGXL and the TGXL tuner with 2sor
the price for the whole thing is $10,000; Listing #1760158 - Submitted on 02/25/26 by Callsign WU5E - IP: customer.atlagax1.isp.starlink.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
VACCUM VAR 2000PF-15KV: 2000PF 15KV PAY PAL SHIPPED UPS INSURED $275.00; Listing #1760143 - Submitted on 02/25/26 by Callsign W4IMD - IP: 99-102-212-226.lightspeed.tukrga.sbcglobal.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Alpha 374: looking for a Alpha part INDUCTOR (TOROID) 19T, 3 CORE, # 12 WIRE (RF SECT) L5 anybody have one ??; Listing #1760127 - Submitted on 02/25/26 by Callsign KB4HF - IP: host-141-27.flgacolo.gainesville.fl.us.clients.pavlovmedia.net; Click to Contact -- Send this Ad to a Friend
Ameritron AL-811H: $1000 plus shipping to the 48. Original non-smoking owner. Excellent shape, in service since Feb. 2018. Now stocked with new (since. Nov. 2025) matched quad Penta 572B tubes--far superior to 811s. The 10m mod has been made by the Amplifier Guy while he was in there replacing a faulty Plate Current/HV meter and he tweaked the whole thing—correcting some hurried construction deficiencies like poor solder joints, etc that Ameritron was famous for. Reliable 750 watts PEP on all bands (caution: you can get more, but over-driving it is ill-advised reducing tube life). I'll ship it packed safely as possible, but you may prefer to come get it here in North Jersey. Wired for 120v.
73,
Scott
W2PBJ; Listing #1760119 - Submitted on 02/25/26 by Callsign W2PBJ - IP: pool-98-109-100-83.nwrknj.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Want to Buy Flex PGXL: Looking for clean well kept Flex PGXL...let me know and lets talk.
Rick NQ4I; Listing #1760088 - Submitted on 02/25/26 by Callsign NQ4I - IP: 110.239.61.81; Click to Contact -- Send this Ad to a Friend