[WRL] 755A VFO and other matters.

[Glen Zook]

The "brute force" method is to drill out the rivets and replace them with machine screws.  Remember, all of the grounds in the unit are made through these and they do work loose and/or become corroded over the years.  Having machine screws does make it considerably easier to get the grounds "good" again.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 2/15/10, Kenneth G. Gordon <kgordon2006 at verizon.net> wrote:

I have a WRL-755A VFO which was given to me some time ago. 
 
It arrived all in one piece and in pretty good condition. The screws holding the chassis into the cabinet had been removed, as also had two of the four screws holding the box on top of the chassis. There was a note attached to the top warning that the chassis was loose.
 
In any case, several years later (yesterday) I fired it up and examined it pretty closely.
 
Quite obviously, the reason the previous owner had opened it up is because the VFO is very unstable. It acts as though something is not making good contact somewhere.
 
I have examined the thing fairly closely, and by now I suspect that the riveted tube sockets and ground connections are not making good contact. I am thinking about getting out my big soldering iron and soldering all those directly to the steel chassis.

Once, after peening one of the rivets, the VFO remained on and steady for over an hour.
 
Has anyone else experienced anything similar to this? if so, what was your solution?
 
Someone loaned me a 755 VFO about 60 years ago, and I thought it was wonderful.