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

SVETLANA GU74B - 4CX800A: Tube tested at ARRAY SOLUTIONS - GOOD TUBE AT 90% of stock emission. Recommend gettering the tube before use.
$300.00 shipped conus - check, cash, paypal - email at qrz is good or TEXT M E at 734-347-7878 NO RETURNS TNX for looking; Listing #1770654 - Submitted on 06/11/26 by Callsign N8XGS, Modified on 06/18/26 - IP: syn-2600-6c4a-147f-7e7b-3887-48ce-1df0-ee6c.biz6.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS: (2) 4CX250b Tubes RCA+EIMAC: See Picture: More available.
Lower Price!
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Here are two (2) 4CX250b Tubes.
(1) EIMAC
(1) RCA
BOTH GOOD USED TUBES KEPT AS SPARES
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Owner (SK) was an avid amp Builder.
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He kept Good Spares on hand for all his amp projects.
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$55.00 Shipped for Both
Paypal, Zelle, USPS M/O
Tnx, Chris-WD8EEQ; Listing #1771048 - Submitted on 06/15/26 by Callsign WD8EEQ, Modified on 06/18/26 - IP: c-73-161-60-200.hsd1.mi.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
3-500ZG- Penta Laboratories tube New: Bought from DXengineering. New in box. I am asking $275 including shipping.Personal check, MO, or in person.; Listing #1771193 - Submitted on 06/17/26 by Callsign AB2DP, Modified on 06/17/26 - IP: syn-2603-7002-23f0-cb00-7b4d-9a05-ec93-e376.res6.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
3TF7, 26Z5 Tubes - Collins R390 Receiver: NOS 3TF7 ballast and two 26Z5 rectifiers for the Collins R390.
These are excess to my needs. Photo attached.

$50 for all should get these sold - prices elsewhere are insane!
Shipping will be $10. Payment via USPS "postal" m/o please; Listing #1770889 - Submitted on 06/13/26 by Callsign KJ6NKX, Modified on 06/17/26 - IP: syn-2600-6c4e-4200-1563-180e-1783-db52-8d85.biz6.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS: UNGAR SOLDERING IRON-1235-S: For Sale: UNGAR Model 1235-S soldering iron Heater in package.
Modular "S" for #750, 776, 777 Handles.
33 Watts 120vac/dc; Takes 1/8" tips.
800F./427C.--Have only two left of this model.
I have many other types of UNGARS, too.
Email me or see my other QTH ads for more.
$9.00 each: $16.00 for both plus $5.50 USA shipping.
Add the Matching Ungar handle for another $7.00
Your check or USPS MO. Or PayPal to: jtg4300 at yahoo.com
I am gd in QRZ.
Will combine shipping, where possible
See my other ads for Simpson, Drake, and other gear.
Your check or USPS MO; I am gd in QRZ.
Just let me know that payment is on the way and I will ship and get you the Tracking number.; Listing #1771167 - Submitted on 06/16/26 by Callsign WA1BRI - IP: 47-199-170-20.fdr01.stgr.fl.ip.frontiernet.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Eimac US Made 8874 Tubes: These are 8874 tubes in excellent condition, full power out, and roughly 2/3 of their service life left.
Just $299 each shipped CONUS.; Listing #1771109 - Submitted on 06/16/26 by Callsign K1FIE - IP: 2603:3006:e02:e900:a55b:d089:3757:4c42; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Eimac 8163/3-400Z NOS Pair in sealed box: Pair of 8163/3-400Z NOS tubes in sealed factory boxes.i no longer own an amp that uses them. $500 for the pair plus shipping; Listing #1770959 - Submitted on 06/14/26 by Callsign KW7V - IP: 2607:fb90:2d8b:88e2:1cb9:1192:4d42:a621; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Solid state tube replacements REDUCED: For sale are a number of solid state rectifiers for replacing vacuum tube rectifiers. $12 each obo plus shipping; Listing #1768914 - Submitted on 05/23/26 by Callsign K6ZIV, Modified on 06/13/26 - IP: c-107-3-161-17.hsd1.ca.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Eimac 7580W / 4CX250R: Eimac 7580W / 4CX250R
Offering this from recent estate tube lot - cosmetics indicate either NOS or very, very low hours.
The 4CX250R/7580W is the heavy-duty, ruggedized version. Like the 4CX250B, it has 6.3v filament voltage.
They ( “typically” ) deliver more output in most linear amplifiers which use 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 -
Reduced Price now: $ 36.00 Shipped (CONUS) from 92117 - 6x6x6 box - 1-2 lbs.
PayPal / USPS MO preferred - Check Accepted, but no ship until clears.; Listing #1770188 - Submitted on 06/05/26 by Callsign W6SDW, Modified on 06/13/26 - IP: syn-076-167-221-168.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
For Sale: GE Tube Caddy with Tubes $100: Offered GE branded Tube Caddy with some tubes. This is part of what the TV/Radio service man brought with Him/Her on home service calls. Includes some tubes from back in the day. No warranty on tubes. Local Pickup is fine. Ships from 81403 on your tab.; Listing #1770707 - Submitted on 06/11/26 by Callsign KD0CMC - IP: 198.179.59.144; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend