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

[Mahlon Haunschild]

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
>