Topband: Bev. antenna cores

[Tom Rauch]

John,

IMO, that was a very poor core to use, as evidenced by the difficulty in
winding. I don't know why anyone would select that core material and style
in this application.

You can use less turns of much heavier wire and have a more reliable core if
you move into 73 material or similar cores.

I don't know how that particular core works after being exposed to high flux
density, but some cores do lose substantial permeability and are not even
recoverable. I do know a 73 material core can actually take a hit strong
enough to physically chip a section of the core and remain usable as a
Beverage transformer.

73 Tom



----- Original Message ----- 
From: "linda doyle" <ldoyle at gwi.net>
To: <topband at contesting.com>
Sent: Sunday, October 03, 2004 6:40 PM
Subject: Topband: Bev. antenna cores


Gentlemen...how can one test a mn8cx core for saturation my ne/sw 2 wire
bev. stopped working and I did everything but paint it to find the problem
and everything appears to be normal the only thing left to do is check for
saturation haven't a clue how to go about it,except wind all new
transformers there are 4 stacked transformers 2 cores each transformer and i
don't have any left however have ordered 16 new ones but there must be some
way to test them otherwise how did that term originate? thanks for any input
on the subject..  John K1GUN..
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