[AMRadio] Need advice on storing RF power tubes

[David Knepper]

I wished that I had used spell check on my post.

"attempting" and "during"

In my humble opinion, the reason for the filament to shatter, break, snap,
open, split; crack, divides, etc. or  whatever occurs is physical jarring.
However, I had a gentleman in New Zealand ship me two 75TH tubes for my
30K-1 and they arrived in great shape.  Think of how many "frequent-flyer
miles" these tubes had since leaving the factory in California.

Best of everything in 2004.


Dave, W3ST
Secretary to the Collins Radio Association
Publisher of the Collins Journal
www.collinsra.com
----- Original Message -----
From: "David Knepper" <cra at floodcity.net>
To: <amradio at mailman.qth.net>
Sent: Wednesday, December 31, 2003 6:03 AM
Subject: Re: [AMRadio] Need advice on storing RF power tubes


> Can anyone explain the difference between the filaments in an ordinary
light
> bulb with that of a transmitting tube.  The point that I am attemting to
> make is that outside lighting - like the lights on our barn withstand
> tremendous cold durin the winter and then when evening comes, the filament
> is shocked with 120 volts.  These bulbs seem to last forever,
particularly,
> street lights.
>
> I am sure that the filaments are made of different material but thought I
> would ask the so-called "experts."
>
> Thank you and Happy New Year
> Dave, W3ST
> Secretary to the Collins Radio Association
> Publisher of the Collins Journal
> www.collinsra.com
> ----- Original Message -----
> From: "Donald Chester" <k4kyv at hotmail.com>
> To: <amradio at mailman.qth.net>
> Sent: Wednesday, December 31, 2003 4:51 AM
> Subject: Re: [AMRadio] Need advice on storing RF power tubes
>
>
> >
> >
> > >BTW, where in 4-land are you where it gets below zero?  I thought you
> folks
> > >had it easy down there compared to those in the great white north? (o:
> >
> > Here in north middle TN, it normally gets below zero a time or two each
> > winter, but the last few winters have stayed above zero.  The coldest I
> > personally remember was -18.  According to the local highway dep't, it
has
> > dipped to -20.  But that's not normal for this region.
> >
> > I also have heard the story about cold storage of tubes.  I suspect
tubes
> > like the 250TH, which already have a brittle filament, would not stand
> > physical vibration while at that temperature.
> >
> > Don k4kyv
> >
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