sorenb

Ok. I'll leave them as is, and give a listen to hear wheather the effort was worth it ( I guess it was ;-) Many, many thanks Kevin for making and sharing your design. Also thanks to Spritzer, mypasswordis, GrindingThud, gepardcv, Pars, JimL, mwl168, and others sharing/contributing to the thread. Pics, or i didn't happen:

Finished two sets of Dynalo this weekend and two sigma22 psu's. The offset seems to drift a lot; without the servo's it's within a range of 40mV on all boards - fluktuate the full range within a couple of min or so.With the servo in place it's within a range of 0,5mV Is that normal behavoir? Using +/- 18V for rails I get approx 22-28mA through the output transistors across the four boards. Would that be running those trans too hard? should I lower r38/39?

I guess the "It's been pretty well discussed, but the 369 is the 'replacement' for the 2SK147." settles it - I have bunch of 147/72. Thnx Pars

can the lsk389 be replaced by a pair of Toshiba 2SJ72-BL? I have 100 pairs of j72/k147 lying around for no use.

Can you elaborate a bit on that Birgir? As far as I understand the load from kgst is less than kgsshv, or do i miss something?

During the weekend I did a complete re-build of my beloved Lambda's. Heavily inspired by 4070 I decided to do a closed housing. The coloration from the housing was a bit hard to avoid so the combination is actually the best combo that even out the coloration. Also the pads had been rebuilt, and certainly removes any etch. The result is outstanding, no one can tell the difference between Rick Astley's "Never gonna give up on you" and Ludvig van's Ninth's ... Let's call 'em 007mkIII, as they are everything the 007 will never become ;o) The sound is "sick as a brick" ;o) (http://inhabitat.com/lego-headphones-bring-new-life-to-old-toys/lego1/?extend=1)

AFAIK there has been at least on run on KGSSHV PCBs from Seeds, has any reported problems with these?