[ARC5] What the......?

[Michael]

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Kenneth G. Gordon
>> I wonder why they went to Loctal, rather than 7 or 9 pin miniatures? 
>> The smaller tubes were used in the VHF stuff.
> That is a good question to which I do not know the answer. I might 
> hazard a
> guess: I have yet to find a bad Loctal tube unless the pins have been 
> corroded off.

If y'all will notice, the Type 12 Rx and Type K-derived Rx used the same
sheet metal with very minor changes.  Going to loctal was, as John noted,
good for high vibration applications but it also represented the least
change needed to use the older chassis design.  The R-10, R-11 and R-22 were
nothing more than upgrades to the R-23(A), R-24 and R-148/ARC-5 with the
R-13, R-15 and R-19 using the same chassis but with front ends more
resembling the VHF units developed during the war.  (The ARC-designed VHF
AN/ARC-5 equipment wasn't a dead end as has been stated.  It provided a
wealth of information for the design of the VHF Type 12s.)  

Bottom line: It was an economy and time-to-market decision.

Best Regards,
 
Michael, K3MXO, CBLA #6, BL01hx15np24 ... or there abouts  
Sometimes I pretend to be normal but it gets boring so I go back to being
me.
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