HW-16 final amp

[wa1vwl]

They probably used a sweep tube instead of a real RF power tube because
of cost and availability. Sweep tubes were cheaper than 6146's and
available from local Radio shack and Lafayette stores as well a
countless other local repair shops. Since the sweep tube was used in
intermittent service, it was supposed to last a long time. I don't know
about the HW-16, but I do know of a mod for Drake transmitters where
6146's are subbed for 6JB6's. Might be worth a shot. The situation is
now reversed: 6146's are common and as a rule, sweep tubes are hard to
find and expensive.

Gerry

Mark S Graalman wrote:
>
>   This is a pointless question I suppose, but does anyone
> know why Heath used a sweep tube in the final of the HW-16
> rather than a 6146? Has anyone tried installing a 6146 in this
> rig?
>
> Mark  WB8JKR
>
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