Date: Sat, 2 Nov 2019 13:25:19 +0000 (UTC)
From: Roger Parsons <ve3zi@yahoo.com>
To: "Tower and HF Antenna Construction Topics."
<towertalk@contesting.com>, "jim@audiosystemsgroup.com"
<jim@audiosystemsgroup.com>
Subject: [TowerTalk] Ferrites 31 vs. 77 material
<Very funny.
<The posts from both N6RK and AB7E support my statement that variability in
ferrite parameters has been known for a very long time. You're the one who
asserted that it has just been discovered and that therefore Steve G3TXQ could
not have known about it.
<73 RogerVE3ZI
## I believe it was N3RR that bought 700, (seven hundred) type 31
cores from one supplier, all from the same lot number..2 years ago.
He used a simple 1 turn link to test them..and then graded them. They
were all over the map, + and – 22%. Thats a whopping 44% spread. No 2
ferrites the same! ALL made in China......so what do you expect ? So
much for fairite moving their factory to China. QC down the tubes
ever since.
Jim VE7RF
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