Re: {Collins} 6146 Tubes

Thanks very much Glen.   This is what I thought.  But I wanted to confirm this 
with some of you guys who know a whole lot more than I do!

Thanks again Glen!

Take care,
Steve  K2FW

PS --- According to the xtals in my 32S-3, it was made in 1968.  However, the 
tubes in it were regular 
6146's.  Since the neutralizing capacitor is an open air variable, I suppose 6146B's 
or later 
W's would be ok in it?

----- Original Message -----
From: Glen Zook <k9sth@xxxxxxxxxxxxx>
Reply-To: Glen Zook <k9sth@xxxxxxxxxxxxx>
To: Collins Reflector(CCA) <collins@xxxxxxxxxxxxx>, Steve <k2fw@xxxxxxxx>
Sent: 5/17/2019 9:43:53 AM
Subject: Re: {Collins} 6146 Tubes

Generally, it is fine to "mix" original 6146 tubes with 6146A / 8298 versions.  However, do NOT mix 6146, 6146A / 8298, or 6293 tubes with either the 6146B / 8298A or 6146W.  My article, on the 6146 family of tubes, which has appeared in the Signal as well as numerous amateur radio magazines, newsletters, etc., all over the world, can be found at the following URL:

Glen, K9STH


On Thu, 5/16/19, Steve via Collins <collins@xxxxxxxxxxxxx> wrote:

Subject: {Collins} 6146 Tubes
To: "Collins Reflector(CCA)" <collins@xxxxxxxxxxxxx>
Date: Thursday, May 16, 2019, 7:31 PM

Hello to the CCA Reflector,

    To all of the expert Collins guys.

    Is it ok to mix in the final RF Stage a 6146
& a 6146A?

    I know that B's 
& W's are different. 
But is the interelectrode capacitance 
between a regular 6146 & a 6146A the same?

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