[Heathkit] DX-60 Final Amplifier Tube Question

[Ed - K9EW]

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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