6146 et al.

[Edward B Richards]

To add my 2 cents worth. When I was in the 2-way business (10) years and
worked for Motorola (15) years I replaced 6146's with tubes marked both
6146B and 8298 on the same tube, I never had any trouble making spec on
commercial radios up to 170 Mc, Regards,
Ed Richards


On Thu, 7 Jan 1999 02:18:48 -0500 Multi-Volti Devices
<multi-volti at SOFTHOUSE.COM> writes:
>If this hasn't been beaten into the ground yet...
>
>My lookups led to the discovery that the 6146 and 6146A had lower
>plate
>dissipation than the 6146B. Among the variations, I also noted there
>were
>differences in filament current (1/8 A difference) and interelectrode
>capacitances. This may explain why neutralization isn't the same
>between
>different tubes, and why not all vintages are usable in all rigs
>(range of
>adjustment of neutralization method?).
>
>I cannot recall if it was word of mouth or seeing it in print, but I
>was
>surprised to hear the the 6146W is actually a ruggedized A, not B, so
>it has
>the lower Pd on the anode.
>
>I had always heard that the 8298A was the commercial equivalent of the
>6146B. I never understood the 6146 to be a consumer/entertainment
>item, so
>maybe it's industrial vs. commercial? I have some 8298's (Motorola),
>and was
>curious where they fell in the scheme of equivalence (A or B?). A tube
>dealer told me the 8298 family were all based on the 6146B specs, not
>A,
>regardless of suffix on the 8298.
>
>Murray
>
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