• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Russian Subminiature Equivalent?

Its because it isn't HTTPS only HTTP I can tell if a website has malware that one has not I am not prepared to post a link that could hide malware regardless of who thinks what having spent years helping people with malware problems.


Its also because its----Russian.



I get up a webpage that actually asks me if I want to go to an HTTP website I don't like third parties controlling me I can make up my own mind as I find websites that are "not approved " by western governments are blocked normally.


Thats restriction of freedom of thought , no "Big Brother " for me.


I can assure you that website does NOT contain malware some tracking but have you seen the tracking on "approved " websites?
 
The closest you would get is probably the pair of 6S28B or 6S29B.
Or a pair of 6S51N if you don't mind nuvistor-type envelope.
All of those are single triodes - I don't know any subminiature dual triode close enough to 6N23P.