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

Amperex 4-250 Transmitting Tube For Sale: Amperex 4-250 Transmitting Tube For Sale:
-
The Amperex 4-250 / 5022 is a high power
transmitting tube, very closely related to
the well known 4-400, and a cousin to the
3-500. It fits the same socket as the 4-400
and 3-500.
-
The major difference between the 4-250 and
4-400 is that the 4-250 has 250 watts of plate
dissipation, while the 4-400 has 400 watts.
They usually can be used interchangeably as
long as the plate dissipation is not exceeded.
-
Weak 4-250
This 4-250 has low output.
It is not dead or shorted, but simply has low output.
It would be ideal for testing an amplifier. It is
NOT dead.
-
Only $19 plus shipping from Florida.
-
Thanks. 73,
Ken Simpson, W8EK
Voice Phone (352) 732-8400
.; Listing #1740239 - Submitted on 08/19/25 by Callsign W8EK - IP: fl-67-76-85-5.sta.embarqhsd.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
6CL6 tubes For Sale: 6CL6 tubes For Sale:
-
I found a stash of 6CL6 tubes. These are NOS.
-
The 6CL6 is used as a driver tube in some of the
hybrid rigs, plus many of the older vintage rigs.
Many have found that low power output in these
rigs is due to a weak 6CL6 instead of weak finals.
-
Buy these for only $8 each, plus shipping from Florida.
-
Thanks. 73,
Ken Simpson, W8EK
Voice Phone (352) 732-8400
.; Listing #1740238 - Submitted on 08/19/25 by Callsign W8EK - IP: fl-67-76-85-5.sta.embarqhsd.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Dead 3-500 Tube For Sale: Dead 3-500 Tube For Sale:
-
I have a dead 3-500 tube available. It
no longer functions as an amplifier, but
the filament in it is good, so it could
be used for making a lamp, or any other
place where only the filament is needed.
Buy it for only $12 plus shipping from Florida.
-
Thanks. 73,
Ken Simpson, W8EK
Voice Phone (352) 732-8400
.; Listing #1740237 - Submitted on 08/19/25 by Callsign W8EK - IP: fl-67-76-85-5.sta.embarqhsd.net; Click to Contact -- Send this Ad to a Friend
3 NEW National Electronics 4cx-250b: 3 New 4cx-250b tubes
Shipped conus for $130; Listing #1738546 - Submitted on 08/04/25 by Callsign WG3U, Modified on 08/18/25 - IP: 150-195-81-149.client.mchsi.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Many power tubes 810, 4-400A REDUCED: For Sale are the following power tubes
8ea 4-400A eimac, other $50each
10ea 810's. various manufacturers $50 each
2 ea PL-175A $50 each
a number of 813's $20 eash
2ea 4d32's $20 each
or make offer, plus shipping; Listing #1732775 - Submitted on 06/13/25 by Callsign K6ZIV, Modified on 08/17/25 - IP: c-174-62-98-30.hsd1.ca.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE: Fully Tested 8877 and 3CX800A7: All ceramic tubes tested and inspected to Eimac specs in June 2025 by retired Eimac Engineer, specific test sheet/data comes with each individual tube. $600 ea and $1100 pair for 8877, $500 ea and $900 pair for 3CX800A7. Untested, unblemished,3 each Eimac Jan-8166, 4-1000A best offer boxing/shipping at cost.; Listing #1734514 - Submitted on 06/29/25 by Callsign K6LQ, Modified on 08/13/25 - IP: 76.192.54.125; Click to Contact -- Send this Ad to a Friend
FS; assorted vacuum tubes: For sale assorted tube I had as spares for my Central Electonics 100V, 200V and 600L amplifier:
Qty-1 new 2AP1-A, CRT for CE 100 & 200V, RCA
Qty-1 Jan 813 Power Amplifier tube
Qty-2 Amperex 866AX rectifier tubes, excellent pulls
Qty-1 RCA OA3 voltage regulator, good pull
Qty-2 12At7, I new one good pull
Qty-2 OA2 voltage regulator new
Qty-1 6AQ5 pull.
Price $55 for package, postage paid in CONUS, PayPal OK; Listing #1739334 - Submitted on 08/11/25 by Callsign WW3KP - IP: pool-100-19-57-149.phlapa.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
8122 Tubes RCA and Burle: Quite a few to choose from
Let me know your requirements
Pair in photo: $150 shipped US; Listing #1737484 - Submitted on 07/26/25 by Callsign KL7AM, Modified on 08/10/25, Web Site: https://kl7am.com - IP: 189-230-137-216.mtaonline.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE new 5894 tube: For sale. New in the box 5894 vacuum tube. $25 plus shipping; Listing #1739089 - Submitted on 08/09/25 by Callsign K6ZIV - IP: c-174-62-98-30.hsd1.ca.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
New in box Mullard 811a: I have for sale 6 Mullard 811a tubes NIB these are the real deal made in England 40.00 each plus shipping cash check or money order; Listing #1736322 - Submitted on 07/16/25 by Callsign W7GS, Modified on 08/06/25 - IP: c-68-56-222-190.hsd1.mi.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend