Craig,
Thanks for working on this and the results you got can be used. Sourcing the original batteries at the correct voltage wasn¡¯t easy but I got some 1.5v. And they did fit well. But after getting them installed I found that the unit was non-functioning. I did work on trying to get a good result which I didn¡¯t. So I returned the unit to the Ebay seller. I¡¯m really struggling to get some functional calibration tools. I spend a fair amount of time working on the oscilloscopes. Then I get stuck trying to figure out how to correct calibration tools. Well anyway I¡¯ll keep looking for the Working Tools then tune them as needed. I¡¯m sure there are lots of these items lost in work shops never to be used again.
Craig C
toggle quoted message
Show quoted text
On Oct 31, 2018, at 3:20 AM, Craig Sawyers <c.sawyers@...> wrote:
Now the new voltage of these is just over 3.2V, so R10/11 had to be increased from 120k to 390k.
(Calculation based on 3V was 348k)
And the unit works perfectly. It confirms that my SG503 is well within specification.
Craig