An update on the 6146 tube

[Jim Roik]

The 6883 has the same versions as the 6146. That is there is a 6883, a 6883A
and a 6883B. My luck has been in finding 6883Bs.

My rule of thumb is to use the 6146 and 6146A interchangeable and the 6146B
when I know the circuit has been designed for 6146Bs. But if I am desperate
I will try switching between the Bs and the others. Most of the time that is
not a problem, but in some cases, the SB500 being one, it can make a
difference.

Most of the tubes that I have found in the past while have either been the
6146 or the 6146B. I don't know if that is just what is in my area or
whether that would apply to most areas.

Jim

> -----Original Message-----
> From: kj6xh at juno.com [mailto:kj6xh at juno.com]
> Sent: Friday, February 09, 2001 12:41 PM
> To: jnroik at ESCAPE.CA
> Cc: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: An update on the 6146 tube
>
>
> Jim,
>
> This is indeed interesting info.
> To which of the 6146s (A, B, whatever) would the 6883 most
> closely equate?
>
> Allen
>
> On Fri, 9 Feb 2001 11:06:01 -0600 Jim Roik <jnroik at ESCAPE.CA> writes:
> > 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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> Rev. Allen Heibeck,  KJ6XH               El Cajon, CA
>          kj6xh at juno.com                       We use HeathKit Boatanchors
> here!
>
>                                         Check it out!
> http://www.tbn.org

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