[R-390] R-388 caps (OT)

[Roy Morgan]

On Jul 25, 2008, at 11:12 AM, John Flood wrote:

> ... doing a "quick" cleanup and checkout of a R388A for someone  
> local... those dogbone caps. ... in the same class as the BBOD's and  
> must be removed at all cost ...?



John,

The dog bones are ceramic and of quite low value - such as 2 to 50  
pF.  I overhauled an SX-88 not long ago which had one burned up and  
one shorted.  Unusual.  If you want a radio to last and be used  
forever hence, replace them, but if they are working ok for now,  
expect no real trouble.

On the R-388:

There is a bathtub can cap under the chassis that is an electrolytic,  
I believe. This is unexpected because normally caps of that shape are  
paper caps of modest value.  Find it and replace it either by de- 
gutting it or placing replacements nearby on a terminal strip.

Of concern are any silver mica caps you may find.  They are suspect  
now.  Get new replacements from Justradios.com in canada.  Good  
prices, friendly service, and prompt filling of orders.
http://www.justradios.com/

I have a J-4 handy but have not yet started any restoration on it.

Roy

Roy Morgan
13033 Downey Mill Rd
Lovettsville, VA 20180
k1lky at earthlink.net

NEW address:
529 Cobb St.
Groton NY, 13073