Swap 12ax7 for 12au7?

[fuzzy beard]

Two triodes in each tube. So, V1A and V1B are both in the same physical tube, V2A and V2B are both in the same physical tube. Four triodes, two tubes.

Hmm. well i do say that threw me for a loop. I work with electrical schematics at work. So i have to say i am a little sad i didnt see it that way. Is there any notation on the schematic to show that? Or just common knowlege?

 

[Chainsaw Willie]

Huh? Why can't you substitute a phase inverter?

 

[Chainsaw Willie]

Hmm. well i do say that threw me for a loop. I work with electrical schematics at work. So i have to say i am a little sad i didnt see it that way. Is there any notation on the schematic to show that? Or just common knowlege?

Yes, but you haven't worked with vacuum tube schematics. If you didn't know it from a 12ax7 being the most common tube in anything surviving the tube era, you would know it from looking up the 12AX7 data sheet or in the bible - the RCA handbook.

 

[LowEZ]

Hmm. well i do say that threw me for a loop. I work with electrical schematics at work. So i have to say i am a little sad i didnt see it that way. Is there any notation on the schematic to show that? Or just common knowlege?

It's stupid because they draw each triode in a complete circle making it look like a complete tube. Some schematics draw them in semi-circles which makes more sense at a glance.

Huh? Why can't you substitute a phase inverter?

I guess technically you can, I wouldn't.

 

[fuzzy beard]

Yeah i think the semi circle would be much better!

Also i am going to have to look up this rca handbook! Tubes are very new to me. I didnt even know what a tube was till about a year ago! I am 26 never known of anything other than solid state.

 

[Chainsaw Willie]

It looks like this. It might cost you a bit more than $1.25 though.

All the info you really need can be found on a google search. There a lot of home brew tube amp info out there.

Duncanamps.com had a searchable data sheet archive.

Here is another excellent resource for info

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[JimmyM]

Is that the manual that Jess Oliver used to cop the B-15 circuit?

 

[fuzzy beard]

It looks like this. It might cost you a bit more than $1.25 though.

All the info you really need can be found on a google search. There a lot of home brew tube amp info out there.

Duncanamps.com had a searchable data sheet archive.

Here is another excellent resource for info

[Invalid or Expired Link Removed]

Thanks.