Strange Wiring in Bogen 6v6 PP

[Yvesm]

AP30 schematic may be helpful:😉

http://www.ampslab.com/SCHEMATICS/BogenAP30.jpg

Regards,
Milan

Oh, yes 😀

 

[moamps]

I am going to abolish EQ (Treble/Bass) section
and add resistor 220K for "Rl". However, I guess
gain will be still high.

Then abolish V3 too.

I don't totally understand how phone stage works.
What kind of circuit is this?

Inverse RIAA filter in NFB. Simulation looks OK. (picture)

How about this? Replace GZ34 of 5Y3 for using 6V6 instead of 7408.

Why?

Regards,
Milan

 

[zxx123]

Then abolish V3 too.

;What do you mean "abolish V3"?
Do you mena just skip it (keep b+ still
connected or remove everything?)



Inverse RIAA filter in NFB. Simulation looks OK. (picture)

;😀 first time to see RIAA circuit.




Why?

Regards,
Milan

Thanks

The Reasons for 5Y3:

1. it is hardly to find out 7408.
2. 6V6 is cheaper.
3. b+ voltage mayl go higher than with V3.




Thanks

 

[zxx123]

How about adding Cathode-Follower?

Can I convert V3 to C-F circuit?