[TowerTalk] Inductor Design and Voltage Breakdown

[Jim Thomson]

Date: Fri, 31 Jul 2015 14:28:11 -0700
From: Jim Brown <jim at audiosystemsgroup.com>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Inductor Design and Voltage Breakdown

On Fri,7/31/2015 2:11 PM, Howard Hoyt wrote:
> I'd love to see the final product, Jim! 

So will I. :)  If it works well, we'll write it up. And maybe even if it 
doesn't, so others can learn from our mistakes. :)

73, Jim

##  As others have pointed out, your V per turn isnt an issue.   Another option is
to use polyimide wire....which is just 15 kv rated  magnet wire.  Then you could
butt the turns..tight up against each other..and uh would really increase a bunch,
so less turns used  vs air spaced coil.  The 15 kv breakdown would mean 
30 kv between adjacent turns.   Then just wind it on a low loss form..like
fiberglass tube etc.   The polyimide in the larger gauges like 14-12-10-8 has
the 15 kv rating. 

Plane jane airdux is plenty good enough.  You can get it in 10 ga.  A local
buddy gave me a bunch of it a while back.... in 8 ga..and aprx 3.5 to 4 inch diam. 
You can also get airdux with different turns spacing. The slightly closer spacing
stuff has more uh..which is ideal for low band applications. 

Even   10-12 ga  THNN wire would easily work in your application..with turns butted up tight.  

Dont confuse V breakdown with 160m  mobile coil setups.  

Jim   VE7RF