[ARC5] Glass or Metal Tubes Preferred for Receivers

[Todd, KA1KAQ]

On Mon, Feb 5, 2018 at 4:56 PM, Richard Knoppow <1oldlens1 at ix.netcom.com>
wrote:

>    I wonder how this happened. The shell of metal tubes normally goes to
> pin-1 which is grounded. Some glass tubes have an internal shield to pin-1.
> It sounds like the pin was shorted to something.
>

I got nailed by this a few years back, too.  A buddy was cleaning out his
garage in preparation for an upcoming hamfest and had a number of receivers
on tables in his driveway testing them out. He asked me to stop by after
work to help him out. A clean NC-173 lit up but refused to sing, so I did
the same 'cold ones' test. The next thing I knew there was a buzz saw
running up my arm. The cold tube was cold for a reason - someone had broken
off the keyway and stuffed it back into the socket wrong. After recovering
I lined it back up properly and the receiver worked fine.

Since then I let them heat up, then shut the set off before checking for
cold cases.

~ Todd,  KA1KAQ/4
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20180209/967afe28/attachment.html>