[Boatanchors] 6146 vs 6146A vs 6146B or 6146W

[Carl]

Mahlon, W meant they had to survive certain tests such as would be found in 
military use. The spec did not mandate any specific way to do it.

Sylvania has long been my favorite brand followed by TungSol.

Carl


----- Original Message ----- 
From: "Mahlon Haunschild" <mahlonhaunschild at cox.net>
To: <boatanchors at mailman.qth.net>
Sent: Tuesday, July 05, 2011 6:29 PM
Subject: Re: [Boatanchors] 6146 vs 6146A vs 6146B or 6146W


> Carl,
>
> That depends.  I have a whole box of Tung Sol 6146Ws (date coded 6943 or
> thereabouts) and their internal structure is like no other 6146 I've
> ever seen, W or otherwise.  Spot welded plates, metal centering springs
> on the top mica, double instead of single getter, etc. The odd part is
> that they're not triple mica.
>
> By contrast, I have a couple of Sylvania 6146Ws (1987 contract, probably
> the last ones ever bought by the Government) that look for all the world
> like any other GE 6146B.
>
> Then again, maybe the differences in this case are just because Tung Sol
> built better tubes than anyone else.  For all I know Tung Sol built
> their "civilian" 6146s the same way.
>
> regards,
>
> Mahlon - K4OQ
>
> On 7/5/2011 1:05 PM, boatanchors-request at mailman.qth.net wrote:
>> ------------------------------
>>
>> Message: 7
>> Date: Tue, 5 Jul 2011 14:04:47 -0400
>> From: "Carl"<km1h at jeremy.mv.com>
>> Subject: Re: [Boatanchors] 6146 vs 6146A vs 6146B or 6146W
>> To: "Richard Knoppow"<1oldlens1 at ix.netcom.com>,
>> <pulsarxp at embarqmail.com>, <boatanchors at mailman.qth.net>,
>> <cemilton at aol.com>
>> Message-ID:<85E6F7139A9540A2BB9082EABAD7D3FC at computer1>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> The W stands for ruggedized and the 6146W internal appearance is
>> recognizable.
>>
>> Carl
>> KM1H
>>
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1388 / Virus Database: 1516/3746 - Release Date: 07/05/11
>