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

wtb 3cx400a7....8874: anybody have a good used 3cx400a7 ie 8874 tube.
on a fixed income
would like to find in the 200 dollar price range if thats possiable
thanks for reading; Listing #1760624 - Submitted on 03/01/26 by Callsign K2DGR - IP: 25.sub-174-197-200.myvzw.com; Click to Contact -- Send this Ad to a Friend
For Sale Vintage Transmitter Tubes: Have the following tubes for sale. Shipping is free.
1ea. New 826 Tetrode. $20.
2ea. 807’s $20
2ea. 837’s $20
5ea. 1625’s $25
2ea. Jan 5R4WGB $25
The tubes look very good. I have no way of testing.
I will entertain offers for the lot at a reasonable reduced price.
I accept PayPal, USPS Money Orders and checks.; Listing #1759511 - Submitted on 02/19/26 by Callsign W8BJ, Modified on 02/28/26 - IP: 157.sub-174-206-35.myvzw.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
For Sale Matched Pair 6LB6 Tubes: Have a New Matched
Pair GE 6LB6 Tubes. Asking $65. Shipped to lower 48. I accept PayPal, Check or USPS Money order.; Listing #1759498 - Submitted on 02/19/26 by Callsign W8BJ - IP: 157.sub-174-206-35.myvzw.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS: Amperex 4CX250F Ceramic Tube: NOS Amperex 4CX250F Ceramic output tube. Tube was mistakenly purchased to replace a 4CX250B. As we found out, the circuit for the 4CX250B is a 6 Volt filament as is the 4CX250B. We then found out that the 4CX250F uses a 26.6 Volt filament source…… so this tube is up for sale as maybe it was developed for military use with that filament voltage? $30 shipped CONUS. Not interested in trades.; Listing #1759402 - Submitted on 02/18/26 by Callsign KH6JTM - IP: c-73-242-208-180.hsd1.nm.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
WTB: 3-500Z or 4-400 dud tube for display only. Let me know what you have in that old parts box!; Listing #1759380 - Submitted on 02/18/26 by Callsign W4MCX - IP: c-174-48-83-42.hsd1.fl.comcast.net; Click to Contact -- Send this Ad to a Friend