19 Sep
2002
19 Sep
'02
8:47 p.m.
A Variac is a kinda transformer. Transformers often
hum. Especialally when the iron laminates in the core
start to come loose. So it's a bit of an old age phenomenon. Even small HF
ferite-based transformers
can squeek (arghhh yuck) if the frequency (product) comes into the hearing
range..........
Sipke de Wal
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http://xgistor.ath.cx
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----- Original Message -----
From: "Sellam Ismail" <foo(a)siconic.com>
To: "Classic Computers Mailing List" <cctalk(a)classiccmp.org>
Sent: Thursday, September 19, 2002 2:36 PM
Subject: Humming Variac?
Is it normal for a Variac to hum when it's plugged in?
If not, any ideas why one would do so?
Sellam Ismail Vintage Computer Festival
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