[CW] Spark

[Neal McEwen]

Ronald KA4INM Youvan wrote:
> 
>    Someone could also put an old copher receiver in a shielded
> room with a model T spark coil transmitter and record the results.
> 
   This would only be the sound of the most rudimentary form of spark
transmission.  Each type of spark transmitter had a different sound: AC
with fixed gap, rotary gap both synchronous and non synchronous, and
quenched gap.  There were others, but these probably account for 90%
more on the transmitters used.  Amateurs used all but the quenched gap.

-- 
73 de K5RW, Neal McEwen, at "The Telegraph Office",
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