[ARC5] BC-455 - intermittant LO.

[Kenneth G. Gordon]

On 25 May 2015 at 13:27, Bill Cromwell wrote:

> Hi,
> 
> The crystal filters in my Kenwood R599 are soldered in but the one in 
> the CW position was not soldered. It didn't fail until about 1998! I had 
> a monster, tube based frequency counter ( to ~1mc) that I bought at a 
> club auction for about a dollar and used for years. Then it sat on a 
> shelf for several years while I went begging for new owner. when I 
> finally salvaged parts from it I found a wire on a ground lug that had 
> never been close to solder. It had never failed.

When I worked at the University of Montana, one of my first jobs there was to 
try to fix a Phillips research X-ray machine which had an intermittant. That 
thing was full of tubes. Although I don't remember at this late date how 
many, exactly, it was something very close to 100 tubes.

After much work, I finally discovered a no-solder joint to the filament 
connection of a tube at the extreme bottom of the unit, buried under at least 
5 layers of wires.

Another factory error.

Fun....NOT!

Ken W7EKB