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

Eimac 7580W / 4CX250R: Offering this from recent estate tube lot - cosmetics indicate either NOS or very, very low hours.
Filament checks good and all pin connection are proper...
( Taken from Eimac Spec Sheet ):
The 4CX250R/7580W is designed specifically for use in Class AB1 linear amplifiers where shock and/or vibration preclude
the use of non-ruggedized tube types. The 4CX250R/7580W will replace the 4CX250B in equipments where the range of
bias adjustment will tolerate this higher purveyance tube and where tuning range can compensate for the small
differences in input and output capacitances. The 4CX250R/7580W will deliver more output in most linear amplifiers
which presently employ the 4CX250B.
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My TV-3B/U tube tester doesn’t cover this one, so it’s sold As-Is / No Return. - Additional Pics on Request -
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Yours for: $ 50.00 + $10.00 Ship (CONUS) from 92117 - 6x6x6 box - 1-2 lbs.
PayPal / USPS MO preferred - Check Accepted, but no ship until clears.; Listing #1755988 - Submitted on 01/16/26 by Callsign W6SDW, Modified on 01/20/26 - IP: syn-076-175-204-014.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
CETRON 6336B - Lot of 3: These are CETRON / JAN 6336B -- Grey Plates, Halo Getters.
Tubes and Boxes have matching date codes - 12/75 (1) and 5/76 (2) - so will assume NOS.
Untested as my Hickok TV-3B/U has no setup data for these. Filaments check good.
Reduced Price: $35 Shipped ( CONUS ) - PayPal preferred.
Will accept USPS MO or Personal Check - but No Ship until cleared.; Listing #1755478 - Submitted on 01/11/26 by Callsign W6SDW, Modified on 01/20/26 - IP: syn-076-175-204-014.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Eimac JAN CBXT 8438/4-400 Tube NOS: I have one JAN 8438 4-400 tube in factory sealed box.
Asking $300 plus shipping.; Listing #1756187 - Submitted on 01/18/26 by Callsign KW7V - IP: ip68-99-249-164.ph.ph.cox.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS: Pair of NEW 4CX1500B VTX-X120: NEW, NOT USED or pulls. MADE IN USA pair of tested Penta 4CX1500B tubes in original Alpha RF boxes with factory testing documents. Zero Hours = N.O.S. Asking $1,200 each for an Alpha 8406 or $2,000 for both to use in a Alpha 8410, or swap for two same condition N.O.S. tested but NEVER USED 3CX800A7 tubes for my 87AR.
With warranty are $1700 EACH = https://www.alpharfsystems.com/?ec_store=pageid1519modelnumbervtx-x120
Free pickup near Denver, or add actual postage/shipping. PayPal OK if needed ASAP or check in mail is OK too. Please email for factory documents or more photos. Tested in my 8410 before that was sold but still have these NEW TUBES.; Listing #1756147 - Submitted on 01/18/26 by Callsign AC0KC - IP: 237-65-42-72.skybeam.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
EIMAC 4-400 AIR-SYSTEM SOCKETS - REDUCED: MAKE AN OFFER
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I have available for sale 2 used EIMAC Air-System sockets. The tube sockets are tarnished, but in good physical condition. One for $45 shipped in the USA, or both for $80 shipped in the USA.; Listing #1754331 - Submitted on 01/01/26 by Callsign K3DUA, Modified on 01/18/26 - IP: pool-108-50-43-148.bltmmd.fios.verizon.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
F/S Qty 2 EIMAC 3CX800A7 tubes: Here is one of my spare sets of 3CX800A7 tubes for my Alpha 87A. These were rotated in for a day every 2-3 years to keep them from getting gassy. Full 1500 Watts output with less than 50Ma grid current. Very closely matched. $799 shipped. I accept Zelle, PayPal, check, USPS M/O. Search my call for more listings. Bob WB2UBW; Listing #1755970 - Submitted on 01/16/26 by Callsign WB2UBW, Modified on 01/18/26 - IP: c-67-187-106-101.hsd1.ky.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
NEW 6JB6A TUBES: NEW 6JB6A TUBES. MOSTLY GE BRAND. WILL SELL GROUPS OF SIX FOR $90.00 PLUS $20.00 FOR SHIPPING. ACCEPT EITHER ZELLE OR U.S. POSTAL MONEY ORDER FOR PAYMENT..; Listing #1755776 - Submitted on 01/13/26 by Callsign K6SAD, Modified on 01/17/26 - IP: 108-83-190-73.lightspeed.frokca.sbcglobal.net; Click to Contact -- Send this Ad to a Friend
NEW EIMAC 3CX-1200A7: NEW EIMAC 3CX-1200A7 FOR $1200.00 PLUS $20.00 FOR SHIPPING. ACCEPT EITHER ZELLE OR U.S. POSTAL MONEY ORDER FOR PAYMENT OR CASH IF PICKED UP. LOCATED IN GRIDLEY, CALIFORNIA ABOUT 70 MILES NORTH OF SACRAMENTO.; Listing #1755777 - Submitted on 01/13/26 by Callsign K6SAD, Modified on 01/17/26 - IP: 108-83-190-73.lightspeed.frokca.sbcglobal.net; Click to Contact -- Send this Ad to a Friend
2K50 Reflex Kylstron - WE / Bell Labs: Perhaps something for your vintage tube collection ??
This 2K50 is labeled: Western Electric 2K50 NE826 - Bell Tel. Labs - Pre-Production.
Excellent cosmetic condition — As I cannot test it, selling as display piece.
Designed as a K band oscillator (10mW output) in the mid/late 1930s.
2K50 saw service during the WWII era and beyond. I’ve seen many examples from Bendix Corp.,
in the past but only a few with the Bell Labs labeling…
Price: $25.00 shipped CONUS - PayPal / USPS MO preferred - Check OK, but no ship until clears.; Listing #1756004 - Submitted on 01/16/26 by Callsign W6SDW - IP: syn-076-175-204-014.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Eimac JAN 327-A UHF Transmitting Triode: This tube appears new and may be NOS and has been in storage since new. Original packing was lost however. $50 Shipped I take Paypal, Postal MO and check; Listing #1755062 - Submitted on 01/07/26 by Callsign W6XI, Modified on 01/16/26 - IP: ip68-109-162-111.ph.ph.cox.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend