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Re: QMX+ Receive sensitivity and birdies

 

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I second the Amphenol only recommendation but it’s still possible for an Amphenol connector to be bad. ?A recent book by a former owner of a major antenna manufacturing company fixed (in the early hours of the morning down in the Caribbean islands the morning before a major contest) a serious antenna issue by checking and replacing an Amphenol connector that was new in the plastic bag when installed the previous day with another one. ?Rescued the day. ?His recommendation is to test everything at home before taking it all on an island excursion. ?Being new in the plastic bag is not always ?a guarantee of quality.?

The only issue I have with the Amphenol products is that many times at various swaps the Amphenol ones are all sold by the time I get there.?

Dave K8WPE


On Mar 18, 2025, at 9:26?AM, Greg McCain via groups.io <gamccain50@...> wrote:

?Funny you should mention that ..

Had intermittent noise, glitches, sensitivity dropouts and such when testing and using my QMXs and QDXs.

Tracked that down to crap Chinese BNC tees, barrels, and couplers. Popped for only Amphenol brand. Huge improvement.?

AND ...? Have replaced the power-in jacks and plugs with 2.5mm, panel mounted screw-barrels. Bit of a kluge internally,? but rock solid on the busy operating bench. Just have to remember to take off the jack mounting nut before removing the applicable end panel.?

GREG KI4NVX?


On Tue, Mar 18, 2025 at 9:17 AM, Mike KK7MMN via groups.io
<treefrogmt@...> wrote:
A 5w penalty on a QRP rig is quite a handicap!!!
I had some odd receive issues the other day and it turned out to be a bad BNC connector.. so small hidden things can really mess with your audio.
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