Do you why that would be the case? Ive never built a rotary gap coil and would like to know more :) Thanks! Matt On Sun, Jul 8, 2018, 4:22 PM <pip@xxxxxxxxxxx> wrote Do you why that would be the case? Ive never built a rotary gap coil and would like to know more :) Thanks! Matt ------------------------------------------------------------------ Matt.My observations were based on just that - observations. We, that is myself and another UK coiler, have ran both SRSG and ARSG coils, as well as statics and each tends to display different streamer characteristics, although it's mainly the rotary coils where this is noticeable. A very good explanation on RSG and static gaps and the pros and cons is at Richie Burnett's excellent web site, as my own brain cells have lost their edge lately on the more technical aspects.
Richie's site is at www.richieburnett.co.uk/ and there is info on my own site http://www.hvtesla.com. Also try the archives on here. Basically once you've decided on either a static or rotary (RSG) gap, then if you choose rotary you then have two flavours: SRSG or ARSG. The latter Asynchronous rotary is quick and easy to build, while a Synchronous rotary is more efficient at lower bps rates, but also a lot more work to achieve, needing motor modification and careful control of the phase using some form of phase control, and also care is needed with the MMC size**. Probably only worth it if you want to squeeze every last bit of performance out of a coil. An SRSG at 100/120 bps (50 or 60Hz) can be particularly challenging as you can then run into some very high resonant voltages if you get the phase wrong. This is now thought to behind the damage at my other recent posting:
https://www.pupman.com/listarchives/2018/Jul/msg00019.php ; entitled "Bad strike to a 12 inch traditional coil (somewhat terminal)"<https://www.pupman.com/listarchives/2018/Jul/msg00019.php>
To sum up:Static: - Easy to build, generally suited up to 6 or 7kW (yes I know others have ran twice that)
Rotary ARSG:- Easy to build, handles power better than a static with theoretically no upper level for hobby coiling.
Rotary SRSG:- Lot more work involved, most efficient up to 300bps (particularly at 200/240 bps) if pursuing 100% power, harder to run, handles power as ARSG above.
People often try SRSG but don't get success because MMC size and phase are critical. (See "resonant charging" on Richie's site)
I've left out 'triggered gaps' another thing that used to interest me, but never got around to trying.
Good luck experimenting.** Note: MMC resonance is affected by both mains frequency AND the bps rate if using synchronous. Richie calls it resonant charging and has an old TCML post reproduced here with the graphs he refers to (now dead links):
http://www.hvtesla.com/richie.html Phil On 09/07/18 15:27, Matthew Sweeney wrote:
Do you why that would be the case? Ive never built a rotary gap coil and would like to know more :) Thanks! Matt On Sun, Jul 8, 2018, 4:22 PM <pip@xxxxxxxxxxx> wrote:If you have wondered on how each perform, especially in their streamer behaviour, have a look here: https://youtu.be/Sm8SoFmnlLM There is a general feeling that 200bps will give marginally longer strikes, while 100bps is better for ground strikes. Phil T _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla
-- Regards Phil www.hvtesla.com _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla