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EIMAC AIR-SYSTEM SOCKETS - REDUCED: MAKE AN OFFER
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I have available for sale 2 used EIMAC Air-System sockets. These will work for the 4-400, 3-500 and similar based tubes. 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 #1759898 - Submitted on 02/23/26 by Callsign K3DUA - IP: pool-173-69-135-23.bltmmd.fios.verizon.net; 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. $40 Shipped I take Paypal, Postal MO and check; Listing #1757804 - Submitted on 02/03/26 by Callsign W6XI, Modified on 02/21/26 - IP: ip68-109-162-111.ph.ph.cox.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
f/s qty 2 3CX800A7 EIMAC 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. Input 45 Watts or less for Full 1500++ Watts output with less than 50 Ma grid current on all bands. Very closely matched. They show tarnished however the tubes are in excellent electrical shape. $790 shipped. I accept Zelle, PayPal, check, USPS M/O. Search my call for more listings. Bob WB2UBW; Listing #1758369 - Submitted on 02/08/26 by Callsign WB2UBW, Modified on 02/21/26 - IP: c-67-187-106-101.hsd1.ky.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Eimac 7580W / 4CX250R: Offering this from recent estate tube lot - cosmetics indicate either NOS or very, very low hours.
( 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. 6.3 v filament same as the 4CX250B. The 4CX250R/7580W will ty[pically deliver more output in most linear amplifiers which presently employ the 4CX250B...
My TV-3B/U tube tester doesn’t cover this one, so it’s sold As-Is / No Return.
- Additional Pics on Request -
Yours for: $ 40.00 + $10.00 Ship (CONUS) from 92117 - 6x6x6 box - 1-2 lbs.
PayPal / USPS MO preferred - Check Accepted, but no ship until clears.; Listing #1759407 - Submitted on 02/18/26 by Callsign W6SDW, Modified on 02/20/26 - IP: syn-076-175-204-014.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Sylvania JHS 5718 - ( Lot of 3 ): Subminiature Triode - NOS in their original cartons.
They have unmolested, original full length leads.
Tube data available on Internet…
Offering as collectables - hence As-Is / No Returns - no testing performed.
Price: ( Lot o 3 ) $20.00 Shipped ( CONUS ); Listing #1759627 - Submitted on 02/20/26 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
Raytheon 5703WA Triode ( Lot of 3 ): Subminiature Triode - NOS - Unmolested, original full length leads.
Tube data available on Internet…
Offering as collectables - hence As-Is / No Returns - no testing performed.
Price: ( Lot o 3 ) $20.00 Shipped ( CONUS ); Listing #1759625 - Submitted on 02/20/26 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
For Sale Vintage Transmitter Tubes: Have the following tubes for sale. Shipping is free.
1ea. New 826 Tetrode. $20.
2ea. 811’s $35
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 - 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