[Hallicrafters] Cold storage for vaccum tubes

[rbethman]

Darell,

    Look back to the Korean War, and post war period.  Things like the 
BC-610 sat in their vehicles for weeks on end in sub zero temperatures.  
They don't keep them warm in motor pools.  I don't believe the temps are 
the major factor, EXCEPT for operating parameters.  Spare parts sat on 
docks for long periods too.

    Having spent a winter or two in the DMZ, it gets damn cold!

Bob - N0DGN

Wa4uso at aol.com wrote:

>Should I bring my 100th's and 250th's in out of the cold? Does prolonged 
>exposure to moderate cold temperatures cause the filament structure to become 
>brittle? Case study, I brought in two NIB RCA 808 triodes from the cold, let them 
>sit for a day, carefully brought the filaments up to the correct AC level and 
>within one hour of testing the filaments they had disintegrated and fallen to 
>the bottom of the tube.
>Your feedback in this matter would be appreciated  73  WA4USO  Darell Darby 
>
>  
>
<                      Bob Bethman - N0DGN
+-------------------------------+----------------------------------+
| N0DGN AMRadio Manassas, VA    |          Home Builder            |
+-------------------------------+----------------------------------+
| Bob Bethman                \\\|///     " The absence of a danger |
| <rbethman at comcast.net>    \\ ~ ~ //      signal does *NOT* mean  |
| Bethman Fine Homes        (/ @ @ /)      that everything is OK " |
+-------------------------oOOo-(_)-oOOo----------------------------+
|               <http://home.comcast.net/~rbethman>                |
| 1 BC-610I w/BC-614I,1 T-213/GRC-26 w/BC614I 1 '51 Collins R-390A |
| 1 '67 EAC R-390A, Heathkit DX-60, Apache, Mohawk, SX-101, HT-32A |
+------------------------------------------------------------------+
|           Amateur Astronomer - Celestron Nexstar 8               |
|             12" f5 Dob coming soon!  Being built                 |
|                  Meade ETX-60 (Got it back!)                     |
|               38 Deg 46.8' N - 77 Deg 28.5' W                    |
+------------------------------------------------------------------+
|   Opinions expressed are that of my own and do not necessarily   |
|         coincide with or represent those of ANYONE else          |
+------------------------------------------------------------------+
  ALL E-mail received and sent scanned by AVG & Norton Anti-Virus>