[Boatanchors] National 6 pin coil forms

[Carl]

The AGS design goes back to 1930 Al, it finally arrived for sale in 
1932.

I have a Tung-Sol spec sheet in front of me for the 89 dated 11/21/28

Back to the marketing theory.

Carl
KM1H



Carl

----- Original Message ----- 
From: "Al Klase" <al at ar88.net>
To: "Carl" <km1h at jeremy.mv.com>
Cc: <Boatanchors at mailman.qth.net>
Sent: Sunday, January 18, 2009 3:26 PM
Subject: Re: [Boatanchors] National 6 pin coil forms


> Hi Carl,
>
> You got me thinking, and reading.  Actually, coil forms with the same 
> base were used in the National "AC Thrill Box" (SW-5) first advertised 
> in QST in July 1930.  I'm pretty sure the standard 6-pin tube base was 
> not introduced until significantly later.  The AGS dates to mid-1932.
>
> So, I stand by my position that National's 6-pin bas was a case of 
> necessity being the mother of invention rather than anal-retentive 
> marketing,
>
> Best regards,
> Al
>
> Carl wrote:
>> Those coils originated with the AGS which uses a 6 pin 89 as the 
>> output.
>>
>> More likely the reason was for a captive audience as the forms were 
>> available in the catalogs.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- 
>> From: "Al Klase" <al at ar88.net>
>> To: "Carl" <km1h at jeremy.mv.com>
>> Cc: "Rodger" <wq9e at dtnspeed.net>; <Boatanchors at mailman.qth.net>
>> Sent: Sunday, January 18, 2009 12:35 PM
>> Subject: Re: [Boatanchors] National 6 pin coil forms
>>
>>
>>
>>> Carl wrote:
>>>
>>>> Dont you just love that proprietary form Roger!.....
>>>>
>>>>
>>>>
>>> Actually, I'm pretty sure that National arrangement predates the 
>>> common 6-pin tube base.
>>>
>>> Al
>>>
>>> -- 
>>> Al Klase - N3FRQ
>>> Jersey City, NJ
>>> http://www.skywaves.ar88.net/
>>>
>>>
>>>
>>
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>
> -- 
> Al Klase - N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
>