On Monday, March 7, 2016 at 2:06:42 PM UTC-8, Jeff Walton wrote:
>
> I have a clock that uses Raytheon CK8754 tubes that has 35 years
> continuous use with no tube issues. That's over 300,000 hours. I hope
> that the B7971's last as long. I'll probably be gone by then..
>
> *Jeff *
>
I
Must be the same guy that I bought from. Each tube was wrapped up in a
single thin layer of newsprint, and then laid in the box side to side
against each other. And yes one did arrive broken, and he wouldn't do
anything about it.Ira.
On 3/6/2016 2:08 PM, Nick wrote:
Odd this. I bought
lt;neonixie-l@googlegroups.com>
Date: 3/6/2016 5:03 PM (GMT-06:00)
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Bad B7971's
Jeff,
Sorry, I have not taken notes as to which the tubes were, although I have
both types. I did look at some to see that the ones WITH the needle still
have
them. Much depends on
the
font that is being used.
Jeff
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com]
Sent: Sunday, March 06, 2016 12:04 PM
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Bad B7971's
Thought I would share, althought I might have
Odd this. I bought substantial batches of these (in the several 100s) from the
guy that originally owned pretty much the world's supply many years ago - apart
from those that broke in transit due to very poor packing, I've never had a
failure.
Where are all these different tubes coming
that is being
used.
Jeff
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com]
Sent: Sunday, March 06, 2016 12:04 PM
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Bad B7971's
Thought I would share, althought I might have already.
Last purchase on ebay
I've used this same 'smacking technique' to straighten up bent elements
inside of such tubes, as Western Electric 'tennis ball' style of tubes
where the glass support arbor is broken inside the tube. Have not broken
one yet!!! Ira.
On 3/6/2016 9:28 AM, Michail1 via neonixie-l wrote:
Thought I would share, althought I might have already.
Last purchase on ebay was a sign which was made up of 7 tubes and says 'GO
AWAY' or 'WELCOME' depending on the position of the switch. 6 more tubes
were to come with it.
Well, I took video of opening the 2 boxes just because of
I took a look at the cathodes under a good magnifier and a few of them you
can definitely see are physically overlapping in the center of the segments
and no deal of smacking the tube can get them to move...;-( I'll PM you
later today. I will measure the resistance of the less obvious ones too,
Measure the resistance between cathode pins to determine how 'shorted' they
really are. It may be possible to zap the shorts. I've done this with
IN-1's before. I'm more concerned about *how* they got shorted, because
Burroughs tubes are legendary for their high quality.
Are the dead segments
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