HW-101 Tubes

[Bill Coleman]

On 11/30/01 3:35 PM, Craig Buck at K4IA at aol.com wrote:

>There has been a lot of discussion about this on previous threads.  I believe
>the consensus was that the various versions of the 6146 had different
>interelectrode capacitances and they were not to be mixed in pairs, i.e., one
>6146 together with a 6146A.  I also think they were not interchangeable i.e.
>substitute a pair of 6146BAs for a plain 6146s.

If you look at the specs, the 6146, 6146A and 6146W are interchangable.
(I think there's also a 12 volt filament part as well -- just the
filament is different -- an 8000 series part, if I remember)

The 6146B has a different plate disappation and different interelectrode
capacitance. A circuit designed for a 6146 or 6146A will often work with
a 6146B. The converse is often NOT true: a circuit designed for a 6146B
may NOT work with a 6146 or 6146A. Often the key parameter is the plate
disappation.

And, if you install pairs, NEVER mix types. Tubes working in pairs should
optimally be matched.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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