|[AMRadio] [Glowbugs] Re: [AWA] Tek 535/545 vertical amp calibration question|
ne1s at securespeed.us
Wed Nov 1 07:25:36 EDT 2017
On 10/28/17 12:26 PM, Michael Hanz wrote:
> Just make one - it seems pretty simple:
> On 10/28/2017 9:41 AM, Larry Szendrei ne1s at securespeed.us
> [antiquewirelessassociation] wrote:
>> I wonder if anyone has any tips for how to calibrate the vertical
>> amplifier on a Tektronics 535 and/or 545 oscilloscope without the EP53A
>> Gain Set Adaptor called for in the manuals' procedure?
A final note on this topic that may prove helpful to anyone who needs to
calibrate the vertical amp on one of these fine old, but beastly,
Using the information in the link that Mike provided (see above), I was
able to take one channel of a spare, unused type CA dual-trace plug-in I
had and convert it to calibrate the vertical amps in both my 535A and
RM45 'scopes. One input of the plug-in now bypasses its amplifier and
accepts a signal from the internal calibrator to set the sensitivity of
the mainframe vertical amplifier to 100mv/cm. After calibrating the
mainframe amp I calibrated the plug-ins (two more type CAs and one type
K). After (and despite) the repair/maintenance dose to the scopes, which
in the case of the RM45 was quite extensive, the calibrations weren't
that far off.
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