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Date: Wed, 28 Jun 2006 11:10:53 +0100
From: John Andrews <w1tag@w1tag.com>
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Subject: Re: LF: Re:Spark
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Bryan,

captbrian wrote:

>>I believe only large and expensive installations on posh ocean liners. had
>rotary spark gaps. <
>
>  
>
Actually, rotary gaps were not at all uncommon, even in amateur use. 
They were divided into two types, synchronous and non-synchronous, 
depending on whether the gap timing was maintained on the AC voltage 
peak . The non-sync was simpler to produce, and most of the amateur 
rotary gaps were of that variety. But with a sync gap setup, you could 
achieve the cleanest note, as you described in your message.

John Andrews, W1TAG