Question about Aikido

[Tubenstein]

My friend has done a simulation and keep R8 and 11 = 240R, and compare to R8 and R11 either 240R or 270R. It makes almost no difference but a hair more gain with 240R. He told me that it will loose just a little gain couple tenths of a db nothing else even all 4 positions with higher resistance ~ 300R.

 

[Tubenstein]

My friend has done a simulation and keep R8 and 11 = 240R, and compare to R8 and R11 either 240R or 270R. It makes almost no difference but a hair more gain with 240R. He told me that it will loose just a little gain couple tenths of a db nothing else even all 4 positions with higher resistance ~ 300R.

Sorry typo! It should be:

"keep R8 and 11 = 240R, and compare to R2 and R4 either both are 240R or 270R."

 

[Alashikata]

I thought R8 and 11 = 240R and R2 and R4 =470R for 300V

 

[Tubenstein]

I want to have this power supply for my Aikido 6SN7. As I'm not a big fans of 5Y3, and I'm more interested in 2 x 274B in parallel. Any change for the substitution?

 

[PRR]

You could look at the curves.

My impression is that they are the "same" tube, or super-similar. (Same heater power too.)

Any slight different in spec is clouded by tube-to-tube variation, and masked by the regulator. Real difference is the socket.

An observation: 500V CT will not make the 300V DC implied at the regulator unless load is very-very light.