Oh, now this is becoming a problem, Jim. You mean head out to the auction
sites and start looking around for calibration equipment??? I will blame
you for the lightness of my wallet if this goes any further. Now I will
spend the next week studying your suggestion and figure out how to make the
test generator. Actually, I have a simple signal generator that outputs a
square wave at 0 dbm. It's made by a company called Elecraft, which
manufactures ham radio kits. It's the same generator that I used to make
that short video that I posted to this site last week. It's not the
cleanest looking signal, but I wonder if that would work to set the 1x and
10x gain.
On Sat, Dec 6, 2014 at 1:00 PM, Jim Popwell jpopwell@... [TekScopes] <
TekScopes@...> wrote:
should work fine¡ the pic is nice¡..
this zener controlled the pull-up current in the final horz stage, it¡¯s
not super critical, it will just change the gain slightly, you may not need
a recalibrate¡.. buy or raid from an old pc mother bd, a small 10mhz- 80
mhz......crystal oscillator with a square wave output and feed the scope.
then check the scope at the proper time base setting and adjust the X1 gain
for the right timing, then the 10X gain. or better yet get you a Tek time
mark generator and have some more fun¡
jim
On Dec 6, 2014, at 12:51 PM, Kevin Crossett kcrossett@...
[TekScopes] <TekScopes@...> wrote:
Hi Ed. the zener is VR4341, Tek part No. 152-0166-00. I'm not sure if the
zener is used as a reference voltage. I believe it is part of the
horizontal amp circuit and bridges the two balanced amplifiers that lead
to
the deflection plates. The part I purchased from Mouser Manufacturer
Part #
1N5234B-TR. I'm not sure if this is a direct replacement for the Tek part
number. I guess I could google the part number and see what the
equivalent
component is.
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