[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] Terry Filter



Hehe, Ditto Matt! A few nights ago I ran a dual stack 15/30 on my little red coil for about 15 or 20 minutes continuous. I didn't realize that my Terry Filter was sitting on a bench and not hooked up. You guessed it, I have another 2 dead NST's (doh!).

Don't just love coiling!
Bart


mddeming@xxxxxxx wrote:
Of course a SGTC will run without any filter, just as a car will run without seatbelts, wipers, or headlights.
There are some of us who would choose not to drive such a vehicle.

Matt D.
"Are you feeling lucky today..."


-----Original Message-----
From: Dex Dexter <dexterlabs@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Mon, Dec 21, 2009 5:23 am
Subject: RE: [TCML] Terry Filter


I run my static gap coil without any filter at all.
ST is 5kv/20ma ,and safety gap is set for
he breakdown voltage of aprox 10 kV peak.
've never saw it arcing so the breakdown oltage of my static gap is probably below 9 kV.
osition and way of connecting the gaps with respect to
ST is important.Both gaps should be paralleled with NST.
Dex
--- Gary.Lau@xxxxxx wrote:
From: "Lau, Gary" <Gary.Lau@xxxxxx>
o: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
ubject: RE: [TCML] Terry Filter
ate: Mon, 21 Dec 2009 02:16:43 +0000
If you build a filter with MOV's targeting a 15kV NST, and you use a 9kV NST, he MOV's will allow a peak voltage of something like 22-23kV before they kick n. With a 9kV NST, the maximum voltage that *should* be allowed is 9000 x .414 = 12726, call it 13-14kV. So it would be permitting too-high voltages hat should have been clamped. One needs to select the correct number of MOV's or the NST voltage used, for the same reason that one needs to set the safety ap for each situation.
Regards, Gary Lau
A, USA
-----Original Message-----
 From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
 Behalf Of chipford@xxxxxxxxxxxxxx
 Sent: Sunday, December 20, 2009 8:31 PM
 To: tesla@xxxxxxxxxx
 Subject: [TCML] Terry Filter
I have my terry filter about 50% done. While building it, I asked myself a uestion. Why would a person build anything but a Terry Filter capable of protecting a ST of 15,000 volts? I ordered 14 MOV's from dig-key. For 4 or 5 dollars more, I ould
 have had 16. Now if i want enough for a 15k trany, I gotta pay shipping
again.Correct me if I am wrong. If I build a Terry filter capable of rotecting a 15K volt trany, I can use it to protect my 9000 volt NST without any odifications. I bring this up because, as we all know, parts get swapped from coil to coil and if I ecide to built a larger coil with my 15k trany later on, I could've just moved it ver without
 worry. Am I wrong?
_______________________________________________
esla mailing list
esla@xxxxxxxxxx
ttp://www.pupman.com/mailman/listinfo/tesla


____________________________________________________________
ashington DC's Largest FREE Email service. ---> http://www.DCemail.com ---> A ashington Online Community Member --->
ttp://www.DCpages.com
______________________________________________
esla mailing list
esla@xxxxxxxxxx
ttp://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla