[ARC5] A.R.C. Type 21 - submini tubes.

[Geoff]

There is a big difference between a one time use design as a fuse and years 
of punishment aboard ship where the RCA SRR series was the worst tube 
shipboard radio ever built for reliability and ease of service.

The KW-32 crypto unit wasnt any better.

Rough seas and gunnery exercises always kept the ET's busy. OTOH the earlier 
RCA RBA/RBB/RBC family were almost indestructible.


----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: <Arc5 at mailman.qth.net>
Sent: Thursday, April 26, 2012 11:29 AM
Subject: Re: [ARC5] A.R.C. Type 21 - submini tubes.


> On 26 Apr 2012 at 7:00, D. Platt wrote:
>
>> head for it.   I also have a bin with a number of the sub-min tubes
>> for spares.  I haven't ever had to replace one but they're there in
>> case.
>
> IMHO, the submini tubes are the very, very best of the vacuum tubes. I 
> have
> never had to replace any of those that have appeared in the equipment I
> own, which includes the RCA SRR-11/12/13 receivers.
>
> Those tubes are really incredibly reliable and tough.
>
> I suppose they would have to be since many were designed to be shot out of
> anti-aircraft guns in proximity fuses.
>
> Tough little buggers.
>
> Ken W7EKB
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