Re: {Collins} 6146's

Be careful... Yes, the Bs can only be used on the later units that have the
air variable neutralization cap and must be carefully neutralized.
Regarding the is not so easy..  The 6146W (as I understand it
from past threads - look them up) is the industrial version of the 6146 and
that nomenclature was used during both the A and the B manufacturing
periods.   You could have early Ws and be fine with the older neutralization
configuration.  You could have had a good experience with the Ws and the
older ceramic neutralization trimmer caps and therefore conclude they were
OK, and then get a later W set that is trouble.

That is my understanding.


-----Original Message-----
From: Collins [] On
Behalf Of Whitebear1122
Sent: Saturday, November 02, 2013 10:18 AM
To: N4BE_Jim
Cc: collins@xxxxxxxxxxxxx
Subject: Re: {Collins} 6146's

My understanding is that it helps to know what neutralization capacitor your
M2 or 32S has, either ceramic or air variable.  Again I understand that
6146's and 6146A's should work in all 32S and M2's regardless of
neutralization cap.  And that 6146B and W's may work with ceramic
neutralization caps, but should work fine with air variable neutralization

Both my earlier 32S and M2A had air variable caps so I replaced the finals
with 6146W's with success and they lasted for 10-12 years, sold them but I"m
sure the tubes are still running.  I have not had any experience with
6146B's and W's with ceramic trimmer neutralization caps so I am only
passing on what I've read over the years.

73, Scott WA9WFA

On Nov 2, 2013, at 9:15 AM, N4BE_Jim <N4BE_Jim@xxxxxxxxx> wrote:

> Resending this as it apparently didn't make it first time...
> I'm sure this has been debated a lot already. .. but... what is the most
appropriate final for S-line and KWM2 ... 6146B? 6146W? Others? And who is a
reputable source? I need a pair. 
> Thanks
> Jim N4BE
> Sent from my iPad
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