25-09-2016, 08:26 PM
(This post was last modified: 25-09-2016, 08:29 PM by ppppenguin.)
I reviewed the Pineapple converter for "405 Alive" when it first appeared in 1993:
http://www.borinsky.plus.com/pineapple_4...SSUE17.PDF
An interesting design as it used twin DACs and an analogue interpolator.
I agree with Ed that the 4000 series analogue switches (4016, 4051, 4052, 4053, 4066) and their HC/HCT equivalents can be prone to failure, probably due to static. Failure isn't always immediately apparent.
I'd be tempted to do a bulk change of the electrolytics. A minor failure in C41, 42, 43 could cause all sorts of havoc.
http://www.borinsky.plus.com/pineapple_4...SSUE17.PDF
An interesting design as it used twin DACs and an analogue interpolator.
I agree with Ed that the 4000 series analogue switches (4016, 4051, 4052, 4053, 4066) and their HC/HCT equivalents can be prone to failure, probably due to static. Failure isn't always immediately apparent.
I'd be tempted to do a bulk change of the electrolytics. A minor failure in C41, 42, 43 could cause all sorts of havoc.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
