Thanks John,
Just finalising the fitting of the new caps now , the line up will be ,10uf foil at the rectifier , second cap after the choke 330uf electrolytic , and an 82 uf in place of the 40 uf , the original caps date from 1961 , but they were wired differently than the schematic shows , one of the 10uf sections was used in series with the 10k to ground , the 40 uf was used in parralel with two of the 10 uf sections making a value of about 60uf after the choke. If the caps were replaced it was a very neat job , but I dont get why the swapped things around .
I can hide the new electrolytic caps inside the paper tube that contained the old three section capacitor , just two extra holes were needed in the chassis to make it all happen ,
I did'nt touch any of the adjustments on the machine yet , it will be interesting to see how the old calibration stands up with new psu caps , it looked good before the old caps smoked anyway .
The other good news is the seller finally contacted me back , turns out he was under the weather for a few days , were gonna come to a settlement over the other unit ,which hopefully he will be sending to me also .
Thats interesting about the settling time of the machine vs stabillity vs thd , the sound after you change the range switch ,the tone glides for a bit ,is really interesting sonically, with more than one oscillator gliding ,it should sound very 50's sci-fi ,BBC radiophonic workshop etc.
Look they even allowed hippies at the controls ,
details of the low distortion and other noise reducing mods for earlier units to be found here ,
http://www.fulltrackproductions.com/HP%20200CD/mods.html
Hopefully the bigger psu cap will provide more stability and less noise in the low end ranges of the unit , and generally a bit less of the modulation at 60/120 that users report .