Michael Tibes
Well-known member
Falk said:...My phone rang too. But that was at least two weeks ago. I understand his worry about a DIY approach on the U23 but he has a product on the market which is high end and aims on a totally different group of users than my approach could ever do...
Wow, this makes me angry! He did copy the old U23 design - just like you - and made some more or less obvious improvements. So how is his approach justifying that you shouldn't do what you are doing?? I really dislike all these 'experts' who claim to have found the holy grail and secret information about the old german tube stuff. When I see the spektrogram of his unit's measurements from the link I posted earlier I can clearly see the hum in there. I do not understand why a unit being built today can still have a measurable hum...
On your unit, in case it hasn't come up and kinda nearly too obvious to mention it: Why don't you use regulated supplies for B+ and heaters?
Michael