[Boatanchors] Octal versus Magnal?

[Phil Carpenter]

The proper name for the HZp-23 socket is 11-pin sub-magnal. This means magnal with a reduced pin circle diameter.

73s

Phil, W4RTX

Sent from my iPhone

> On Jan 8, 2014, at 2:00 PM, Chuck McGregor <cbmcgr at gmail.com> wrote:
> 
> Jim & David-
> The socket generally called Magnal has 11 pins in a 1-1/8 inch diameter
> circle and is used on the 2AP1 CRT and others.   The socket having 11 pins
> on a ~3/4 inch circle, Amphenol Series 78, part #78-11S  does NOT mate with
> Magnal plugs and lacks a common name.  Many users refer to all of the
> Series 78 sockets having a center post similar to an octal socket, as
> "octal with a number of pins".   While this may be an abuse of "octal"
> which has its root as the number 8, it does provide a name for the socket.
> 
> Historically, Amphenol had Series 78 plugs and sockets from 4 to 12 pins in
> manufacture and general use from the 1930's.  Socket #78-8S is identically
> the octal socket pattern used for tube sockets.  The plug equivalent is
> #86-CP8 and was described in their 1945 catalog as "8-prong octal".  The
> same list describes plug 86-CP9 as "9-prong (octal style)"  and 86-CP11 as
> "11-prong (octal style)".   The larger Magnal CRT socket was listed as
> Amphenol part #49-SS11L and described as "Magnal steatite socket".
> (steatite was a ceramic tradename).
> 
> 73,
> Chuck K7MCG
> 
> 
> 
> 
>> On Wed, Jan 8, 2014 at 8:41 AM, qrv at kd4e.com <qrv at kd4e.com> wrote:
>> 
>> I trust that Jim will not mind me sharing his interesting
>> post from an eham discussion thread from last year:
>> http://www.eham.net/ehamforum/smf/index.php?topic=84048.0
>> 
>> ----------------------------------------------------------------
>> The 11 pin plug/socket used by Heath and some others, and
>> for relays, has a correct name:
>> 
>> It is "magnal".
>> 
>> "11 pin octal" is an oxymoron, because "octal" means "having 8"
>> 
>> Don't ask how I know this.
>> 
>> 73 de Jim, N2EY
>> ----------------------------------------------------------------
>> 
>> --
>> 
>> David (NOT Dave) Colburn, KD4E - Nevils, Georgia USA
>> 
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>> 
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