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Old 2nd October 2012, 06:04 PM   #11
kisshu is offline kisshu  United States
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wow there are a lot of smart people hear i'm digesting the info anld will get back to you- also i've been putting together a simulation using simplix simplistechnologies.com so i can post that here or somewhere later but i'm still trying to find models for the s2a.. 2sc.. and sk170 plus the diodes. wondering if the LSK170 would be a good substitute for modeling the jfet?

thanks for your interest and thoughtful replies

Last edited by kisshu; 2nd October 2012 at 06:08 PM. Reason: spelling
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Old 2nd October 2012, 10:39 PM   #12
ilimzn is offline ilimzn  Croatia
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LSK170 is a direct replacement for the 2SK170
There is nothing that strange with the topology, except you do not often see the 100k resistor between the collectors of the current mirror, and a folded cascode VAS...
Revox is otherwise well known for hving some interesting twists in their designs, somewhat atypical by both european, US and japanese design standards of the time.

Last edited by ilimzn; 2nd October 2012 at 10:42 PM.
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Old 3rd October 2012, 06:36 PM   #13
kisshu is offline kisshu  United States
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Quote:
Originally Posted by ilimzn View Post
LSK170 is a direct replacement for the 2SK170
There is nothing that strange with the topology, except you do not often see the 100k resistor between the collectors of the current mirror, and a folded cascode VAS...
Revox is otherwise well known for hving some interesting twists in their designs, somewhat atypical by both european, US and japanese design standards of the time.
yes that 100k resistor connected across both collectors makes me wonder why not across one collector? isn't it a single ended output converter mirror?

what is a folded cascode vas? oh its a common base wonder why they use the term folded?

Last edited by kisshu; 3rd October 2012 at 06:49 PM. Reason: answer
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