[sdiy] [OT] My Scope Saga

Tim Ressel timr at circuitabbey.com
Thu Mar 21 19:42:15 CET 2019

My replacement power supply came in this morning. I am no longer 

On 3/17/2019 5:25 PM, Adam Inglis wrote:
>> On 18 Mar 2019, at 9:56 AM, Brian Willoughby <brianw at audiobanshee.com 
>> <mailto:brianw at audiobanshee.com>> wrote:
>> I think it’s kinda funny, because sometimes I repair vintage synths 
>> for local musicians, but I have to look to someone else to get my 
>> ‘scope repaired.
> I’ve recently finished repairing a 50 year old CRO. There were a 
> variety of (mostly power related problems) but the area that really 
> stumped me was the high voltage circuit for the CRT itself. I had no 
> experience with this type of circuit and no way of testing the high 
> voltages. I made a divide-by-10 test probe, took a voltage measurement 
> at virtually every point on the schematic and muddled through, ended 
> up virtually rebuilding the entire HT circuits either side of the 
> coils, and eventually got those electrons hitting the screen in a 
> coherent way. Took a couple of years between all the other jobs….
> Adam
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy

--Tim Ressel
Circuit Abbey
timr at circuitabbey.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20190321/b3903183/attachment.htm>

More information about the Synth-diy mailing list