[sdiy] Heathkit Oscilloscope Information

Bob Weigel sounddoctorin at imt.net
Thu May 17 10:00:43 CEST 2012

On 5/16/2012 11:59 AM, Tim Daugard wrote:
> Partially off synth topic - but does anyone have a schematic an/or 
> manual for a Heathkit (Bell & Howell) IOD-4540 Oscilloscope? Mine died 
> yesterday, and I hate playing with high voltage circuits without 
> having any knowledge of what the voltages are and where.
> And for those of you still with me, anyone have a favorite model for a 
> NEW oscilloscope costing less than $500 (approximately an extra $30-40 
> won't kill me.) (for my Euro friends that would be a 400 euro or less 
> scope.)
> And as long as I'm being obnoxious anybody got a favorite place to put 
> web pages? Cox deleted all customer web pages (copyright worries I 
> guess) so my synth book is no longer on line. I've thought about 
> setting up a server here, but that involves upgrading an old computer 
> to link to my LAN and letting everyone access if with an IP address 
> instead of www. That would be a trip back to the FTP days of the '90s.
> Thanks for the time y'all,
> Tim (the other Tim) Daugard
> Who hasn't updated his signature page since my computer crashed and 
> cox eliminated my web pages. However I've finally managed to get back 
> in my lab now that my mother died about 9 months ago.
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
Good chance a high voltage cap went leaky as I recall.  I think I have 
the same scope maybe I used to use here.

Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!

More information about the Synth-diy mailing list