[Collins] Grounding attachments S-1 line

[Jim Brannigan]

A 1/4 inch drill is way too big.  I figure that anyone who is going to drill
into a metal chassis would at least use a sharp bit.....(heck, you can buy a
new bit for a $1), a decent drill and some common sense.  I don't like to
create extra holes in vintage radios, but there are no "Hanger Queens" here
and if it is my safety at issue, it gets a hole......

The S-line is not bad, but I once lost a printer hooked up to a R-390A that
was about 50VAC off ground.

Jim


> Drilling a hole wrecks a collectible radio doesn't it? Not all have the
> center screw in the bottom rear. Pulling enough to pull the ground cable
> will also pull enough to disconnect others.
>
> Drilling a hole is certainly safer, but damaging. I recall the hole a
> new lab tech at Collins drilled for me one day in a freshly alodined and
> silk screened panel. He had only one drill bit about 1/4 inch and it had
> never been properly sharpened after being used to drill concrete. The
> huge burr it left (where I needed a hole for a #4 screw) he attacked
> with 36 grit sandpaper. I picture the safety conscious ham doing no
> better. I had words with the lab tech supervisor about training and
> equipping new lab techs while the project had to wait for an updated
> drawing and for the model shop to carve, alodine, and silk screen
> another panel. I don't remember seeing that "new" lab tech again.
>
> 73, Jerry, K0CQ