Post by jimmybing on Jun 11, 2013 6:21:59 GMT -5
I look for J137B russian tube to make with. These are its stats.
BUT!
guitarnuts2.proboards.com/thread/4775
It really needs 45v heating!? I thought Anode is not heater, which is what is 45v. Anode at 45V is max anode volts, and heater is Filament volt 1.2 yes?
Type pentode
Application oscillation,amplification and mixing
Cathode type oxide,direct heating
Filament voltage,V 1,2
Filament current,A 0,052-0,066
Anode voltage,V 45
Grid1 voltage,V 0
Grid2 voltage,V 45
Steepness,mA/V 0,65-1,25
Reverse grid current,uA 0,1
Microphnic noise,mV 60
Socket type flexible
Application oscillation,amplification and mixing
Cathode type oxide,direct heating
Filament voltage,V 1,2
Filament current,A 0,052-0,066
Anode voltage,V 45
Grid1 voltage,V 0
Grid2 voltage,V 45
Steepness,mA/V 0,65-1,25
Reverse grid current,uA 0,1
Microphnic noise,mV 60
Socket type flexible
guitarnuts2.proboards.com/thread/4775
What Takamine uses is a 12AU7 "underclocked", probably for about 13V. As you can see yourself it is a very "hungry" tube.
I also checked the tube you have linked, JAN6418 is still better (smaller and needs only 10mA). The only comparable soviet tube (1J37B) needs 45V heating.
The plasticine block was a thought to avoid microphonics, not for heat dissipation. And I really want to keep the vibrato system running, it is a very rare (and nowadays impossible to find) Wilkinson VS100C.
Anyway, thanks for the input, the mail from Australia will probably arrive in a month, so there is enough time to think everything out properly and I do appreciate any ideas :-)
I also checked the tube you have linked, JAN6418 is still better (smaller and needs only 10mA). The only comparable soviet tube (1J37B) needs 45V heating.
The plasticine block was a thought to avoid microphonics, not for heat dissipation. And I really want to keep the vibrato system running, it is a very rare (and nowadays impossible to find) Wilkinson VS100C.
Anyway, thanks for the input, the mail from Australia will probably arrive in a month, so there is enough time to think everything out properly and I do appreciate any ideas :-)
It really needs 45v heating!? I thought Anode is not heater, which is what is 45v. Anode at 45V is max anode volts, and heater is Filament volt 1.2 yes?