With Teflon insulated wire and Scotch 27 tape between windings probably
4-5KV.
A Hi-Pot tester is great for such things.
Carl
----- Original Message -----
From: "Chris Wilson" <chris@chriswilson.tv>
To: <amps@contesting.com>
Sent: Sunday, June 11, 2017 4:43 PM
Subject: Re: [Amps] Ferrite Core for 160M PI Output ?
Hello Carl,
I am beginning to build an LF amp using a GS35B tube, what do you
reckon the HV limit is for a Pi coil wound on a toroid? At 136 kHz air
wound coils start to get pretty big nd bulky.... Thanks
On Sunday, June 11, 2017, you wrote:
** The T225-2B is sometimes hard to source so a pair of the A version is
equivalent. A pair of the more common T200-2A or 2B is what was used in
most
amps.
Ive run two 200-2A's on 160 for about 30 years in a modified NCL-2000
without problems at 1200W including AM.
Dont forget to wrap each one with a layer of Scotch 27 HV tape and then
wrap
the stack before winding. I also used #14 stranded Teflon wire as that
was
what I found on a big reel at a scrap dealer.
Carl
--
Best regards,
Chris mailto:chris@chriswilson.tv
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
---
This email has been checked for viruses by AVG.
http://www.avg.com
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|