[ARC5] Old Navy Tube Numbers

Mon Nov 12 17:41:22 EST 2012

Absolutely not!! At most I would make one or two pages available for 
research purposes (in accordance with Title 17) as I said in a previous 
email. I also pointed interested persons to a web site where a 
non-copyrighted government document is available which contains most of the 
information. I have my own bought and paid for edition of "Tube Lore." No 
one suggested distributing copies of a protected work. Why would you suggest 
such a terrible act?

John  WA4WDL

--------------------------------------------------
From: "Geoff" <geoffrey at jeremy.mv.com>
Sent: Monday, November 12, 2012 5:28 PM
To: <jfor at quikus.com>; "jmfranke" <jmfranke at cox.net>
Cc: "ARC-5 List" <arc5 at mailman.qth.net>; "Roy Morgan" <k1lky at earthlink.net>
Subject: Re: [ARC5] Old Navy Tube Numbers

> Its copyrighted 1996, I dont believe you are suggesting doing something 
> illegal?
>
>
> ----- Original Message ----- 
> From: "J. Forster" <jfor at quikus.com>
> To: "jmfranke" <jmfranke at cox.net>
> Cc: "ARC-5 List" <arc5 at mailman.qth.net>; "Roy Morgan" 
> <k1lky at earthlink.net>
> Sent: Monday, November 12, 2012 9:49 AM
> Subject: Re: [ARC5] Old Navy Tube Numbers
>
>
>> Is Tube Lore available anywhere as a .pdf (preferably free)? The HC seems
>> pretty expensive.
>>
>> -John
>>
>> ============
>>
>>
>>
>>> Yes, see pages 129 and 130 of "Tube Lore" by Ludwell Sibley.  For many
>>> tubes, like the type 80,  381 or 382 was added to the two digit
>>> designation:
>>>
>>> 80 = 38180
>>> 19 = 38019
>>> 39 = 38039
>>>
>>> For Some other tubes such as 6C6, 6D6, and 6F7, 38 was added and the
>>> letter
>>> was replaced with the alphabetical number for the letter, for example:
>>>
>>> 6C6 = 38636 - C is the third letter in the alphabet
>>> 6D6 = 38646 - D is the fourth letter in the alphabet
>>> 6F7 = 38667 - F is the sixth letter in the alphabet
>>> 2A3 = 38213 - A is the first letter in the alphabet
>>>
>>> For some three digit tubes we see:
>>>
>>> 803 = 38803
>>> 807 = 38807
>>> 837 = 38837
>>> 955 = 38955
>>>
>>> And there are other schemes as well.
>>>
>>> John  WA4WDL
>>>
>>>
>>>
>>>
>>>
>>> --------------------------------------------------
>>> From: "Roy Morgan" <k1lky at earthlink.net>
>>> Sent: Sunday, November 11, 2012 9:55 PM
>>> To: "ARC-5 List" <arc5 at mailman.qth.net>
>>> Subject: [ARC5] Old Navy Tube Numbers
>>>
>>>> Arc-5 folks,
>>>>
>>>> A fellow in Canada has just got two RBC's and an RAB power supply.
>>>> The schematic I find for the power supply
>>>> (at: http://www.skywaves.ar88.net/commrx/RCA/RAB/RAB_schematic.gif )
>>>> has the old navy numbers for tubes - I am guessing that 38180 means
>>>> type 80 rectifier.
>>>>
>>>> Is there a cross reference list of these old 1930's tube types?  My
>>>> tube notes includes only this message on the topic (I just added the
>>>> 38180 entry):
>>>>
>>>> Roy
>>>>
>>>>
>>>> Date: Mon, 14 Jul 2003 13:01:04 -0400
>>>> To: glowbugs <glowbugs at piobaire.mines.uidaho.edu>
>>>> From: "John M. Franke" <j.m.franke at larc.nasa.gov>
>>>> Subject: GB> 38XXX series tube numbers
>>>> Sender: owner-glowbugs at piobaire.mines.uidaho.edu
>>>>
>>>> Those 38XXX series tube numbers.
>>>>
>>>> While trying to get a US Navy military surplus RU-17 receiver working,
>>>> I ran across some strange tube designations.  The final audio output
>>>> tube is a 38233, which I had never heard of.  Searches for information
>>>> seemed fruitless.  Then, scanning the manual for another US Navy
>>>> military surplus receiver, a DZ-2, I saw a pattern.  The 1939 manual
>>>> implied that the 38XXX system was a "Former Navy Type" designation.  I
>>>> observed that the first two digits, 38, was used to designate the item
>>>> as being a vacuum tube (see:
>>>> http://www.designation-systems.net/usmilav/electronics.html#_EarlyNavy
>>>>  orhttp://www.maritime.org/wish-mote.htm).  The last three digits are
>>>> either the commercial tube designation or a coded version of the
>>>> commercial designation.  If the first of the three digits is a "0",
>>>> the following two digits are the commercial designation.  For example,
>>>> a 38041 is the same as a type 41 vacuum tube and a 38076 is a type
>>>> 76.  For other tubes, like a 38636, the two sixes are retained and the
>>>> second digit is replaced with the corresponding letter.  In this case,
>>>> the third letter in the alphabet is a "C", so a type 38636 tube is
>>>> actually a 6C6.  A 38646 is a 6D6 and so on.  A short list of tube
>>>> numbers I have translated is presented below.  Of course, the system
>>>> did not work for the specific tube I was seeking, but it does seem to
>>>> work for others.  Is the alignment I discovered real or happenstance?
>>>> Does anyone else have a clue or reference for the 38XXX numbering
>>>> system?
>>>>
>>>> 38041 41
>>>> 38076 76
>>>> 38111A         CW211C
>>>> 38142 2C45, 45 Special
>>>> 38145 845
>>>> 38166 866
>>>> 38180           80 rectifier most likely
>>>> 38233 2C21/1642
>>>> 38636 6C6
>>>> 38646 6D6
>>>> 38808 808
>>>>
>>>> Sincerely,  John  WA4WDL
>>>>
>>>>
>>>> Roy Morgan
>>>> k1lky at earthlink.net
>>>> K1LKY Since 1958 - Keep 'em Glowing!
>>>>
>>>>
>>>>
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>>>
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>>
>>
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>
> 