UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Test Gear and Workshop Equipment

Notices

Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

Closed Thread
 
Thread Tools
Old 4th Mar 2015, 3:06 pm   #21
dave cox
Nonode
 
dave cox's Avatar
 
Join Date: Jan 2009
Location: Bristol, UK.
Posts: 2,059
Default Re: 'Scope Probes

Quote:
IIRC, Tek went further with this method of probe switching on some 'scopes, where the resistance between ground and the BNC 'pip' was checked to identify what probe was connected and its attenuation. So the 'scope could detect, say, x1, x10 and x100 probes.
Definitely the case with the 7000 series amps with 1M inputs, e.g. 2a26, 7a13 and 7a22 (which will display 1000V/div).

dc
dave cox is offline  
Old 4th Mar 2015, 4:29 pm   #22
Alistair D
Nonode
 
Alistair D's Avatar
 
Join Date: Jan 2010
Location: Edinburgh, UK.
Posts: 2,008
Default Re: 'Scope Probes

The 465 and 468 scopes use this method as well.

The 465 has only X1 and X10 switching so a shorting pin is ok.

The 468 has X1, X10 and X100 so uses the resistance method.

Al
__________________
I won't tell you how I discovered that.
Alistair D is offline  
Old 4th Mar 2015, 6:20 pm   #23
ColinTheAmpMan1
Octode
 
ColinTheAmpMan1's Avatar
 
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,464
Default Re: 'Scope Probes

Are you sure about this? I have the manuals for the 464, 465, 466, 468 and 475A And there is no mention of X100 sensing in any of them. The manuals generally state that for checking, an 11k resistor can be used to connect to ground instead of a X10 probe. I also have the 'scopes 464, 466, 468 and 475A and I can only see windows for the X1 and X10 illumination.

For reference, the 464 and 466 are storage crt types, the 465 is plain vanilla 2-channel and the 468 is a DSO; all these have 100MHz bandwidth. The 475A has a bandwidth of 250MHZ.
ColinTheAmpMan1 is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 1:19 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.