An update on the 6146 tube

[Jim Roik]

Something to consider when you are using a Heath rig that has 12.6 V
filament supply is making a small wiring change on the filaments so that you
can use a 6883. This is a 6146 that operates with a filament of 12.6 volts.
Because people are not aware of that they are often less expensive than
6146s. I've gotten these at flea markets where they have been overlooked by
others and have been very cheap.

Jim

> -----Original Message-----
> From: Heathkit Owners and Collectors List
> [mailto:HEATH at LISTSERV.TEMPE.GOV]On Behalf Of Bill Coleman
> Sent: Friday, February 09, 2001 8:58 AM
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: An update on the 6146 tube
>
>
> On 2/8/01 9:53 PM, Larry Knapp at kc8jx at YAHOO.COM wrote:
>
> >The following is the development sequence:
> >6146   Original Design
> >6146W  Ruggedized version of the original
> >6146A  Improved basic 6146
> >6146B  Final improvement
>
> This is what I remembered. The W is more like the original or the A than
> the B.
>
> >The 6146B "appears" to be designed specifically for SSB service.
>  The 6146B's
> >have a higher plate dissipation than do the 6146 or 6146A and
> also there are
> >filament current differences.  There are more differences between the
> >6146/6146A and the 6146B and are illustrated the vacuum-tube data
> >contained in
> >the back of the ARRL Handbook.
>
> Most of these differences have to do with inter-electrode capacitance.
>
> >A tube substitution guide reveals that there are several commercial tubes
> >that
> >can replace the individual 6146 tubes.  This is not meant to be
> >all-inclusive:
> >
> >6146, 6146A, 6146B  -   8298A, 8192A
> >
> >I am not sure if 8298's and 8192's come in B or W versions.
>
> I thought the 8000-series had 12V instead of 6V filaments.
>
>
> 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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