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In an effort to reduce spam and the spread of viruses, we are now providing this form for you to contact a person that has placed an ad on QTH.COM. After submitting this form, an e-mail will be generated and sent to BOTH you and the person that placed the ad. The e-mail will contain a copy of the ad, plus your e-mail information and your comments.

NOTE -- BEFORE YOU RESPOND:

1. Please Read the Safe Trading Tips article from KA9FOX.
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2. Use the Feedback Forums to see if the person you are about to deal with has any good or bad feedback from previous dealings.
   Link opens up a new window, so you can come back to this ad later

You are responding to the following ad:

Ad Number:	1751271
Date Placed:	11/30/25
Name:	Mark Jackson
Phone Number:	6155880659
Callsign:	6155880659
Category:	MISC
Heading:	For Trade: Carleton O₂ Solenoid Valves
Ad Message:	Pair of Carleton Technologies / Treadwell Corp Oxygen-Service Solenoid Valves P/N 04577/3521-0001-3 — Matching Units — Seller Refurbished This listing is for a matched pair of Carleton Technologies oxygen-service solenoid valves with Treadwell-manufactured bodies. Both valves share the same model number (04577/3521-0001-3) and are rated for 3000 PSIG oxygen service. Each unit is powered by 105 VDC and draws 22 W peak / 8 W average. Perfect for aerospace repair, oxygen delivery systems, high-pressure pneumatic control, research applications, or aviation surplus collectors. Both units were professionally refurbished under U.S. Navy contract **N00104-10-G-A002**, and each carries a clearly readable refurbishment date (01/13 and 07/14). Bodies, ports, fittings, and nameplates are in excellent condition with tight threads, clean surfaces, and intact electrical connectors. No corrosion, leaks, or mechanical damage. These valves are extremely hard to find on the secondary market, especiall

Your Response to this Ad:

Due to the amount of non-ham scammers trying to respond to the ads, I am now asking a simple question that ham operators should easily be able to answer, but scammers may not know the answer: What is the number that hams use to represent the phrase "Best Regards"? This number is typically transmitted by hams at the end of a QSO.
Best Regards:
Your Name:
Your Callsign:	(Enter NONE if you have no call)
Your E-mail Address:
Your E-mail Address Again:
Your IP Address:	216.73.216.166
Please forget all information you have automatically stored about me in cookies.
Your message:
BUY / SELL / TRADE SAFELY! I agree that I have read KA9FOX's Safe Trading Tips HERE (link opens in new tab).

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