[Heathkit] DX-60 Final Amplifier Tube Question

[john]

I used them in my HW101 .  Neutralized them and they worked fine.  Was I 
lucky? Maybe... but that's all the electronics store had in stock and it 
was also before the internet.


John K5MO



At 08:11 PM 2/8/2012, Carl wrote:
>Mine came with a 6146W replacement in it and its still there working fine
>many years later.
>
>There is a big difference between Class C and AB1 which I guess is where
>some rigs are fussy.
>My Viking II is fine with 6146B's, plug and play.
>
>Carl
>KM1H
>
>
>----- Original Message -----
>From: "Ed - K9EW" <k9ew57 at gmail.com>
>To: <heathkit at mailman.qth.net>
>Sent: Wednesday, February 08, 2012 6:50 PM
>Subject: Re: [Heathkit] DX-60 Final Amplifier Tube Question
>
>
> > See Glen's (K9STH) explanation at
> > http://k9sth.com/uploads/The_6146_Family_of_Tubes_1.pdf
> >
> > 73,
> > ed - k9ew
> >
> >
> >
> > On Wed, Feb 8, 2012 at 5:13 PM, Ken Miller K6CTW
> > <k6ctw at earthlink.net>wrote:
> >
> >> All,
> >>
> >> I have an original DX-60 and have been looking around for another 6146
> >> (or
> >> better yet a 6293 although pretty expensive it is supposed to last a LOT
> >> longer than a 6146 as it was designed for pulse modulation).  All this is
> >> just to make sure that the backup/repair kit for this radio will have a
> >> spare or two.  Searching the usual sites noted that there are a LOT of
> >> 6146W and 6146B variety tubes out there but not a lot of the older
> >> 6146/6146A.
> >>
> >> Anyway, I seem to recall hearing that when replacing a 6146 or 6146A you
> >> should NOT replace it with a 6146B.  Since my earlier post, folks have
> >> sent
> >> me schematics for the later DX-60 models and there seems to be very
> >> little
> >> difference between the circuits.  The only one appears to be that the RF
> >> choke on the control grid is now a 1.1 MH instead of 1.0.  Thus my
> >> question, why not put a 6146W in there as they are cheaper and easier to
> >> find?
> >>
> >> Thanks in advance for any advice.
> >>
> >> 73 - Ken, K6CTW
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