Yep, the J-36 I had as a teen in the 50's was a great bug, but only
because it was manufactured by Lionel, of model train fame. The J-36
had several manufacturers of the Vibroplex design. Lionel use a thinner
spring on the pendulum and mine would easily go down to about 10 WPM.
Dits on all Vibroplexes I've seen bottom out at around 35 WPM, unless
you severely weight or extend the pendulum.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 11/9/2017 8:09 PM, Joe Ford via Elecraft wrote:
On the subject of prized keying devices, Mine are:
Speed-X semi automatic - my favorite!
Kent straight key - best straight key I've ever used
Vibroplex J-36 made for the US Army in 1941
Joe
K4NVJ (cw op since 1962)
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