[Hallicrafters] Interesting find

[Jim Liles]

That’s interesting Walt,

I have some 0A2WA's that were built in 1963 that used Krypton 85 which has a 
half life of 10 years.  Today they should have 1/32 of the radio active 
material left with the rest decaying to Rubidium.

They are very unusual.  They do not have a knee to conduction i.e. the 
voltage doesn't have to slightly exceed 150.2 volts to flash then drop to 
150.   They simply conduct at 150 and stay there even if you filter the 
output.  The others will oscillate if over filtered.  They still work fine 
after 50 years.

Kindest regards Jim K9AXN

-----Original Message----- 
From: Walt Cates
Sent: Friday, May 20, 2016 12:19 PM
To: hallicrafters ; hallicraftersradios at yahoogroups.com
Subject: [Hallicrafters] Interesting find

Clearing out boxes I have not looked at for 30 or 40 years. Found a NOS Navy 
part still sealed in the heavy brown wax paper. It is a JAN 1B24 TUBE FOR 
MODEL AN/APS-15A. I believe it provided T/R antenna switching or protection 
shorting out the rx during the tx pulse. Anyone out there collect such 
things. OH, BTW IT IS RADIO ACTIVE.

Walt Cates, WD0GOFIf your ethics are situational then you have no ethics.

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