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

FOR SALE: USR-N540 4-Port Serial Server: NEW-IN-BOX: USR-N540 4-Port Serial Device Server.
The USR-N540 is an industrial 4-port serial device server
that converts RS-232/RS-485/RS-422 serial devices to Ethernet
TCP/IP so sensors and controller can be monitored or
controlled over a network.
$140 shipped. Payment via VENMO or US Money Order.
73,
Scott; Listing #1764073 - Submitted on 04/04/26 by Callsign WA0TPN, Modified on 05/21/26 - IP: 57-89-181-166.mobile.uscc.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE: MXL 990 USB Condenser Mic: The MXL 990 USB is a large diaphragm condenser microphone
used for vocals, podcasting, and recording. This MXL 990 USB
Is new-in-box.
$85 includes shipping
Payment via VENMO or USPS Money Order.
73,
Scott; Listing #1764079 - Submitted on 04/04/26 by Callsign WA0TPN, Modified on 05/21/26 - IP: 57-89-181-166.mobile.uscc.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS:Dell WD22TB4 Docking station: Nice Dell docking stations. 2 x WD22TB4 and K20A. $100 each. Power supplies 2 x LA180PM180 180 watt $40 each and 2 x LA240PM160 240 watts $60 each. All plus shipping.; Listing #1768602 - Submitted on 05/20/26 by Callsign W1JCW - IP: 23-92-13-217.wirestar.net.wirestar.net; Click to Contact -- Send this Ad to a Friend
FOR SALE or TRADE: iMac G5 1.8 GHz 20 in: (M9250LL/A)
Replaced PSU with working used one from 100% positive-rated, 4.7K items eBay seller intellitec23. Successfully installed Lubuntu 16.04.5 without encryption or LVM, since Apple abandoned PPC OS support. I've spent more time & money than $100 restoring this as far as I can, overall. Has 160GB SATA HD, 4X "SuperDrive", 2x256MB RAM, basic black power cord, Apple-branded power cord, an original CRT iMac keyboard (model M2452, teal) that passed on keyboardtester.com - you clean it out. No AirPort card. Screen scratches pictured. Wired ethernet will need a Linux pro vs my noob skills to reactivate so it can download ham packages.
$100 cash or bitcoin or trade for under-store and/or manufacturer warranty HF station components (other than antenna or SWR meter, already have those), face-to-face only in San Diego, CA.; Listing #1767915 - Submitted on 05/12/26 by Callsign N6ATF - IP: ip68-101-210-239.sd.sd.cox.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Intel NUCS 3: (1) Intel NUC7i5BNH i5 processor, 8gb RAM, 500gb M.2 SSD, Windows 11 fresh install $150 shipped
(2) Intel NUC7i5BNK i5 processor, 8gb RAM, 250gb M.2 SSD, Windows 11
fresh install $125 shipped
(3) Intel NUC7i5BNK i5 processor, 8gb RAM, 250gb M.2 SSD, Windows 11
fresh install $125 shipped
All are in good physical and working condition
Thanks for looking K2VJK; Listing #1767816 - Submitted on 05/11/26 by Callsign K2VJK - IP: dhcp-38-162-141.cust.empireaccess.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
CanaKit Raspberry Pi 5 CASES ONLY - Blac: CanaKit Raspberry Pi 5 CASES ONLY - Black & Silver
Has paskage and everything
Asking $18.00
listings>> https://forums.qrz.com/index.php?search/152957671/&q=kb3mtu&o=date&c[node]=7
https://forums.qrz.com/index.php?search/152957764/&q=kb3mtu&o=date&c[node]=24
***PLUS shipping to the 50 states and US possessions only.
Payment. prefer : PayPal, Venmo, personal check, postal money order....all A-OK
All Sales are Final. No refund or Returns.
Brian C. Plante Sr,
kb3mtu at gmail.com
KB3MTU, 73; Listing #1767786 - Submitted on 05/11/26 by Callsign KB3MTU - IP: pool-96-227-128-44.phlapa.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Hynix 2GB 1Rx8 PC3-12800S-11-11-B2 x2: Hynix 2GB 1Rx8 PC3-12800S-11-11-B2 X2
Asking $8.00
listings>> https://forums.qrz.com/index.php?search/152957671/&q=kb3mtu&o=date&c[node]=7
https://forums.qrz.com/index.php?search/152957764/&q=kb3mtu&o=date&c[node]=24
***PLUS shipping to the 50 states and US possessions only.
Payment. prefer : PayPal, Venmo, personal check, postal money order....all A-OK
All Sales are Final. No refund or Returns.
Brian C. Plante Sr,
kb3mtu at gmail.com
KB3MTU, 73; Listing #1767782 - Submitted on 05/11/26 by Callsign KB3MTU - IP: pool-96-227-128-44.phlapa.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
USB Type C Switch Extension Cable 2 Pack: USB Type C Switch Extension Cable 2 Pack USB C Female to Male Power Cable with On Off Switch USB-C Extender Cord for LED Desk Lamp, USB Fan, LED Strips
Asking $5.00
listings>> https://forums.qrz.com/index.php?search/152957671/&q=kb3mtu&o=date&c[node]=7
https://forums.qrz.com/index.php?search/152957764/&q=kb3mtu&o=date&c[node]=24
All Sales are Final. No refund or Returns.
*PLUS shipping to the 50 states and US possessions only.
Payment. prefer : PayPal, Venmo, personal check, postal money order....all A-OK
Brian C. Plante Sr,
kb3mtu at gmail.com
KB3MTU, 73; Listing #1767748 - Submitted on 05/11/26 by Callsign KB3MTU - IP: pool-96-227-128-44.phlapa.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
USB 3.0 HDMI KVM Switch 1 Monitor 2 Comp: USB 3.0 HDMI KVM Switch 1 Monitor 2 Computers, 8K at 60Hz KVM
Asking $25.00
listings>> https://forums.qrz.com/index.php?search/152957671/&q=kb3mtu&o=date&c[node]=7
https://forums.qrz.com/index.php?search/152957764/&q=kb3mtu&o=date&c[node]=24
***PLUS shipping to the 50 states and US possessions only.
Payment. prefer : PayPal, Venmo, personal check, postal money order....all A-OK
All Sales are Final. No refund or Returns.
Brian C. Plante Sr,
kb3mtu at gmail.com
KB3MTU, 73; Listing #1767712 - Submitted on 05/10/26 by Callsign KB3MTU - IP: pool-96-227-128-44.phlapa.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Computer Patch Interface, Model CP-1: Advanced Electronic Applications Computer Patch Interface, Model CP-1. $40, and I will cover the cost of shipping. I am not a HAM, I am the youngest son and the Executor for the estate of W3BNN. Proceeds are for the benefit of the widow's estate. All equipment listed under the W3BNN callsign was in use as of December 2024. Interested parties are encouraged to look at the W3BNN QRZ page. Ozzie was active for 70 years. I will do my best to answer any technical questions with advisory assistance from my father's amateur radio friends of over 60 years.; Listing #1767113 - Submitted on 05/05/26 by Callsign W3BNN - IP: pool-173-66-96-27.washdc.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend