[TenTec] 4229 Tuner Balun Replacement?

[Don Jones]

I would be more interested in actual measurements than theoretical
calculations. 

Don Jones KO7i
Arlington, WA 



-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Steve Hunt
Sent: Monday, November 15, 2010 4:12 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] 4229 Tuner Balun Replacement?



On 15/11/2010 00:24, Dr. Gerald N. Johnson wrote:
> Yet if the common mode voltage is enough it conceivable could saturate
> the core.

If you do the thermal calculations on the cores commonly used in these 
chokes you'll find it's almost impossible to saturate them - for typical 
amateur mode duty-cycles they will over-heat and fracture at flux 
densities well below those at which they saturate. And that problem is 
avoided by designing them to have very high CM impedance.


73,
Steve G3TXQ
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