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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.
   Link opens up a new window, so you can come back to this ad later
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:	1760141
Date Placed:	02/25/26
Name:	Mark Brasche
Phone Number:	8604046397
Callsign:	W1MM
Category:	MISC
Heading:	SDR Guardian Antenna Sharing Controller
Ad Message:	I make these antenna sharing controllers because there is positively NOTHING on the market that even comes close. Period! Full manual at http://w1mm.com/sdrg/SDRG_Manual.pdf YouTube video demo at​ https://youtu.be/i0pmxehTbG4 Specs: Max pwr: 100W PEP Isolation relay switching: Fully preemptive, bidirectional Preempt delay adj: 25-250mS (50mS default) PTT input polarity: - (default) or + (5-12v) CW mode: Semi break-in Semi break-in decay: 0.1-1.0 seconds Isolation: >135db (140db typical. Yes, really) LNA gain: 5db from 160-6m (SDR output only) Fail-safe trigger voltage: ~250mV peak (-2dbm or 0.6mW) Fail-safe clamp response time: -45db within ~35nS, -135db within 10mS.​ $239 ea., free USPS priority S&H (US only). Outside US, S&H extra. Cash App or Venmo preferred. Paypal if you twist my arm. More pics at my QRZ page, W1MM. 7 units in stock for immediate sale, 15 more in the pipeline.

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:	216.73.216.81
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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