switching between 2a3, 45 and 300B for Joplin

DIY HiFi Forum

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Hi Kuei Yang Wang,
I'm expecting my Joplin and I am interested in your mod. I was wondering if you have completed your mod and incorporated a switch to interchange from 2a3 to 45 to 300B?
Can you pls tell me how you plan to put (locate) the switch and where to connect the pins?
You especially focused on 2a3 and 45. What is the configuration for 300b?
What is the final material list needed? I would like to keep the hum pots on. I don't mind drilling extra couple of holes. I am not experienced on tube electronics but I understand the basics easily. Therefore I need a bit more explanation to implement, rather understand it. I could use the schematics.
A weird question, is it possible to switch the operation of the given tubes in class AB1 and A1 modes by means of similar multi point switch? Is it too complicated? Can it be possible on top of your mod?
Appreciate your help,
Rasim.

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Topic - switching between 2a3, 45 and 300B for Joplin - Rasim 00:01:50 02/20/03 (2)

Re: switching between 2a3, 45 and 300B for Joplin - Kuei Yang Wang 06:31:34 02/20/03 (1)

Re: switching between 2a3, 45 and 300B for Joplin - Rasim 07:09:44 02/20/03 (0)

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