Thanks for the tip, Ed.
Always corroborate. Tek used specific color-coded wires for the
power supply lines; if "225" doesn't point to red-red-green, the label
is wrong. Or the wire.
Dave Wise
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-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]On
Behalf Of Edward Knobloch
Sent: Friday, September 26, 2008 9:40 AM
To: TekScopes@...
Subject: [TekScopes] Tek 545 Hint
Hi, Gang
I have a 545 (no suffix) scope, and recently had to do some
trouble-shooting. One hint: when measuring d.c. voltages
along the ceramic terminal strip which has the voltages labeled
on the nearby chassis edge, note that the "225V" label
is offset by one position. The label points to a position
on the strip which has a trimmer capacitor connected,
it should point to the adjacent position which has several
white wires with red stripes connected.
I won't tell you how long I searched for spare tubes
associated with the 225V regulator, before I realized
the error. I have since added an arrow with a magic marker
pointing to the correct spot.
73,
Ed Knobloch
