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

MISC - SDR Guardian Antenna Sharing Controller: I make these antenna sharing controllers because there is positively NOTHING on the market that even comes close. Period! Full manual at http://w1mm.com/sdrg/SDRG_Manual.pdf
YouTube video demo at https://youtu.be/i0pmxehTbG4
Specs:
Max pwr: 100W PEP
Isolation relay switching: Fully preemptive, bidirectional
Preempt delay adj: 25-250mS (50mS default)
PTT input polarity: - (default) or + (5-12v)
CW mode: Semi break-in
Semi break-in decay: 0.1-1.0 seconds
Isolation: >135db (140db typical. Yes, really)
LNA gain: 5db from 160-6m (SDR output only)
Fail-safe trigger voltage: ~250mV peak (-2dbm or 0.6mW)
Fail-safe clamp response time: -45db within ~35nS, -135db within 10mS.
$239 ea., free USPS priority S&H (US only). Outside US, S&H extra.
Cash App or Venmo preferred. Paypal if you twist my arm.
More pics at my QRZ page, W1MM.
7 units in stock for immediate sale, 15 more in the pipeline.; Listing #1760141 - Submitted on 02/25/26 by Callsign W1MM - IP: 32-219-38-150.bng02.wtrb.ct.ip.frontiernet.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
TUBES - F.S. 4CX1000A Power Tube: I am selling one 4CX1000A tube that I had kept as a spare to my ACOM A1500 amplifier. I sold the amplifier about a year ago and no longer have a need for this spare. It performed very well in the ACOM1500 and was my backup tube. I am asking $360 shipped and insured to anywhere in the continental USA. I accept Personal Check, Postal Money Order or PayPal (Friends and Family).
Please contact me via eMail, on this QTH.COM ad only.; Listing #1760140 - Submitted on 02/25/26 by Callsign K9AU - IP: 115-251-182-166.mobile.uscc.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
AMPHF - WTB: DPDT coax switch: Looking for either a 12vdc coil or one of the old manual ones that you would use to bypass an amplifier or tuner. Please state condition and pics. Only responses through the contact button will be answered. Tnx for reading.; Listing #1760139 - Submitted on 02/25/26 by Callsign WD8NPL - IP: syn-065-024-055-094.res.spectrum.com; Click to Contact -- Send this Ad to a Friend
ANTHF - Grazioli MV-7 Atenna: Hi, I have a brand new Mv-7, I have opened it to look at the directions and check all of the parts where there. I just don't have the strength to build and deploy it. It is a real nice antenna built out of high-quality parts. They retail for $1099 in the USA. below are the specs: asking $879 including shipping to lower 48 and accepting Pay Pal, Zelle, Check or PO money order. Sorry no trades or returns. Thank you, Tom K1CXS
Vertical multiband 1/4 λ Ground Plane base-fed antenna for the following HAM bands: 40, 20, 17, 15, 12, 10 and 6m.
Extremely robust construction in AW6063-T66 aluminum alloy and CNC machined parts from solid stock.
Supplied with high-quality 304 and 316 stainless steel fasteners for long rust-free operating life.
High input power, up to 1500W SSB at 40m - 3kW on other bands.
Detailed assembly manual and serial number that identifies the production batch and construction data.
stock photo to show what it looks like built!; Listing #1760094 - Submitted on 02/25/26 by Callsign K1CXS, Modified on 02/25/26 - IP: 72-92-130-52.burlvt.fidium.ccidns.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
RADIOHF - FS Kenwood TS-590SG new price: Kenwood TS-590SG, MINT, 6 months old, late serial number.
comes with all assoc and box. AS CLOSE TO NEW AS YOU WILL FIND.
PENDING
PayPal, Zelle, all good,
thanks and 73!
Jim AA9NN; Listing #1759501 - Submitted on 02/19/26 by Callsign AA9NN, Modified on 02/25/26 - IP: 107-196-191-77.lightspeed.cicril.sbcglobal.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
RADIOANQ - Kenwood ts 520 with accessories: Good condition transceiver with speaker mic and remote vfo.
Also comes with replacement capacitor kit. Asking $300; Listing #1760136 - Submitted on 02/25/26 by Callsign KD8BDH - IP: 46-110-19-170.elnsmiaa.metronetinc.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
AMPHF - QRO 2500DX: I have a great working QRO 2500DX with great tubes in it nice power house amp has all new caps in it. I will have it at Dalton hamfest can demo it on the air on 80 meters. $2200.; Listing #1759948 - Submitted on 02/23/26 by Callsign KK4TKW, Modified on 02/25/26 - IP: syn-068-118-104-114.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
MISC - k4dpk PEP Adapters, VFO Stabilizers: The k4dpk PEP Adapter displays your ACCURATE PEAK POWER, and the "hang time" at peak can be adjusted to your liking. Makes tune-up easier, safer for tubes. WIRED AND TESTED Universal Model fits tuners and wattmeters....$35.
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Deluxe model for Drake W4/WH7 Model installs in minutes...$55.
(Shown mounted in a W-4. The wattmeter itself is
not for sale).
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NEW!!! PEP For Bird 43...installs in just minutes, NO Holes, Glue or other irreversible changes. Single battery power. Very low current draw. Ask for details.
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US Postage $7. Ask about outside-USA shipping.
I accept USPS Money Order, personal check or PayPal.
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VFO STABILIZERS Available FOR MANY OLDER RIGS. ASK!
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73
Phil C. Sr. k4dpk; Listing #1759758 - Submitted on 02/22/26 by Callsign K4DPK, Modified on 02/25/26 - IP: c-24-125-203-217.hsd1.ga.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
RADIOHF - Yaesu FTDX 101D: I have a nice Yaesu 101D with the latest firmwire works as it should have both boxes it came with new. I will have the radio at Dalton hamfest. $2300 they are over $ 4000 with taxes new. can let you hear it on 80 or 40 meters if interested.possibly interested in trades; Listing #1759947 - Submitted on 02/23/26 by Callsign KK4TKW, Modified on 02/25/26 - IP: syn-068-118-104-114.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
ANNOUNCE - New scammer: If you come in contact with a gentleman name Richard W Ewing, Call sign KO7N his address is valid. He is a scammer. He will make an agreement with you and then want more money, thus breaking his agreement. I can send you an email that I wrote him documenting mostof the rransaction. He refuses to either send me the radio, or send me my money back. It's a long story, but I am willing to give more details. Right now, he owes me $350. He wishes me to send him another Applecard for $25. I have told him no. Anyway, seems to me, he listed here a whole bunch of stuff. Have nothing to do with this guy. He'll make an agreement with you, and then he will want more money. His wife died of cancer, he might play that angle. You are now warned.; Listing #1760135 - Submitted on 02/25/26 by Callsign KF6TI - IP: 73.232.253.228; Click to Contact -- Send this Ad to a Friend