Re: Async vs. Sync

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Jason,

Tesla list wrote:

> Original poster: "Jason Petrou by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com>
>
> Hi there
>
> Just about to start building an RSG to replace an old cpper pipe gap... what
> are the thoughts of people on using SRSG or ARSG type gaps... Surely SRSG
> would be better because it fires on the caps' peak charging point... why use
> a gap with a BPS different to 100? Why use anything except 100? Im really
> confused...
>
> Jason

Don't be confused. 100 bps is fine for sync 50Hz gaps (or 120 for 60 Hz).
Both work well. You appear
to see the basic logic for using a sync gap, but a sync gap is limited to
specific bps based on
rotating and stationary electrode setups. Non-sync gaps can be good too "if
they have the ability to
vary the bps". Typically, this is a DC motor where the voltage varies the
rotational speed thus
increasing or descreasing the breakrate (dc because of it's simplicity).
There are breakrates which
cause the sparks to grow and the coil to run very smooth. A non-sync ac
motor is probably the worst
choice, but some have used this as well with success (which I believe means
the coil produced
streamers and nothing died in the process). I personally wouldn't go this
route. I see no benefit and
possible problems where zero crossing occurs periodically and the cap
voltage climbs beyond it's
capabilities. Some systems might survive, but I'd bet some will won't.

Take care,
Barton B. Anderson