[Amps] Alpha 87A Won't Transmit

[Chris Wilson]

Hello Amps,

 Thursday, April 8, 2021

 I agree entirely, I am active on LF at 137kHz and had a whale of a time tracking down an SWR issue. it turned out two UHF connectors didn't like a kilowatt of LF through them. I spent ages on it until I used my AIM4170 analyser to do a TDR and it showed exactly where the issues were. I am now slowly changing out all UHF Chinese junk to branded N types and have had no issues with them, save damage to my wallet and time...

I guess the old adage "you get what you pay for" is evident in my case.


Best regards,
 Chris    2E0ILY       mailto:chris at chriswilson.tv


>>In my experience, UHF connectors, especially spices, often develop
>>corrosion and intermittent connections on the inner conductor. I’ve
>>discovered that if I undo a PL259 and look at the mating S0239, I can
>>clean a lot of carbonized goop out of the hole.

RA> In my experience the problem is crappy off shore UHF females with pin
RA> cups that don't tightly grip the male center.  Read this:

RA> https://forums.qrz.com/index.php?threads/a-rogues-gallery-of-panel-mount-uhf-jacks.735574/

RA> 73
RA> Rob
RA> K5UJ
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