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

[J. Forster]

I've not checked the pinouts, but the corresponding Loctal and octal tubes
may be very similar. That would save a bunch of design and testing effort.

Also the socket punchings may well be the same also.

Does anyone have a link to the Type 12 Maint. Manual. I'm curious about
the connector in the place where the ARC-5s have the frequency dial. I
assume the other connectors are Power and Control Box.

-John

=============

> -----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.
> http://www.nationalmssociety.org/chapters/NTH/index.aspx
> http://wh7hg.blogspot.com/
> http://kludges-other-blog.blogspot.com
> Hiki Nô!
>
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