[Kenwood] TS950SDX antenna relay problem fixed

[Peter Ravn]

Long time intermittent problems with the t/r antenna relay in my TS950SDX have finally been solved. Sometimes signals were very low, until the PTT was activated. The phenomenon was on all bands and only appeared occasionally when I turned on the radio, never during operation. 

The problem proved to be bad soldering on the filter unit board of three of the antenna relay pins and an intermittent open between antenna plug and board.

So long time search for a new antenna relay is no longer relevant. The original S51-1429-05 is discontinued and replaced by Matsushita NR-HD-12V, which is hard to find in Europe. It can be replaced by 400-604-12 = RH-12V, which is sold by Dönberg Electronics in Ireland (http://www.electronic-spare-parts.com/search?query=rh12v) for € 30 Euros each. Replacement is no longer relevant un my case, but might be for others.

 

73 de Peter

OZ8CTH