[R-390] R-390 Problems

[Roy Morgan]

At 09:39 PM 9/12/2006, ToddRoberts2001 at aol.com wrote:
>...RG-8X jumper that I purchased at Radio Shack... a bad connection in one 
>of the PL-259's.  There must be a moral in here somewhere.
>
>David
>KC2JD
>
>... The hot lead in the UG-970/U was open circuit and no way to fix it. We
>threw away the bad connector. Problem solved. 73 Todd WD4NGG

Todd, David and others,

The topic of Rat Shack products,, and a defective UG-970 remind me of low 
cost PL-259 "L" adapters.  Some time ago it was reported that these things 
(source unknown to me but likely "the Shack") were made with SPRINGS 
connecting the two ends of them. The spring formed an inductance that 
heated up during even moderate power transmit operation, caused a change in 
the impedance seen by the transmitter, and led to failure of the 
thing.  Dissection after failure revealed the bogus construction.

Use good stuff.  It pays off.

Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
13033 Downey Mill Road, Lovettsville, VA 20180
Phone 540-822-5911   Cell 301-928-7794
Work: Voice: 301-975-3254,  Fax: 301-975-6097
roy.morgan at nist.gov --