UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Help needed with

3pinplug · 19th Feb 2023, 8:45 am

Hi Paula, Peter

I have run the tests requested but this time taken a pic of the trace on the screen so you can see what I am seeing so there is no confusion, results as follows:-

IC24
Pins 9,10,11,12 - square waves observed as attached, pin 13 which i believe to tbe the output the trace line remains on the crosshair as set and doesn';t move at all when connected to Pin 13 of IC24.

Also noted that IC24 is a "CD4002AE" IC not a "CD4029AE" as we have been delaing with up to now, so looked up datasheet as was unsure which was output pin, please confirm pin 13 was correct to select for the output measurement?

I will show the test point measurements on the screen in next uploaed following this as can only attach 5 pics.

19th Feb 2023, 8:45 am	#115
3pinplug Pentode Join Date: Jun 2016 Location: Kent, UK. Posts: 190	Re: Help needed with - Racal Dana 9081 Hi Paula, Peter I have run the tests requested but this time taken a pic of the trace on the screen so you can see what I am seeing so there is no confusion, results as follows:- IC24 Pins 9,10,11,12 - square waves observed as attached, pin 13 which i believe to tbe the output the trace line remains on the crosshair as set and doesn';t move at all when connected to Pin 13 of IC24. Also noted that IC24 is a "CD4002AE" IC not a "CD4029AE" as we have been delaing with up to now, so looked up datasheet as was unsure which was output pin, please confirm pin 13 was correct to select for the output measurement? I will show the test point measurements on the screen in next uploaed following this as can only attach 5 pics. Attached Thumbnails