My S 20R has one also, made in 1942, was at Camp Pendelton at the NCO club.
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On Sat, Apr 26, 2025 at 08:49 Arthur Smith via <arthurredsox=
[email protected]> wrote:
Not the first, or the last, but my SX-42 sure has it.?

On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:
?
Here's a question
that is of general interest to me.? What was the first and last
Hallicrafters radio (Receiver or Transceiver) that had a flywheel
incorporated into the main frequency tuning?? I do recall in High
school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B
too).? Did any of the SR series transceivers or later SX-receivers
have a flywheel hidden inside?
73
Don N9OO