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Triodino 2A3 or Morrison Micro 2A3 ? Advice please!

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les hudson

(M)

Rebuilding my Loftin/White SRPP 2A3.I'm trying to decide which would be better The "Triodino" or Morrison Micro ? I want to use existing parts from my SRPP 2A3 which has 1) 350-0-350 175ma power supply for both channels.
here is link for Morrison Micro

http://www.the-planet.org/images/2A3--6SL7_small.jpg
Here is Triodino power supply

http://gallery.AudioAsylum.com/cgi/gi.mpl?u=33876&f=T3SCH2.gif
Here is Triodino circuit
http://gallery.AudioAsylum.com/cgi/gi.mpl?u=33876&f=T3MY1.gif
Here is my existing schematic.
http://gallery.AudioAsylum.com/cgi/gi.mpl?u=33876&f=2a3-se.gif

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Re: Triodino 2A3 or Morrison Micro 2A3 ? Advice please! - mwiebe 12:56:25 03/15/07 (2)
Well there is no best and no short cut to building a variety of topologies and finding out for yourself which sounds best given your room, speakers, music choice and what harmonic balance you like. The better a design is documented on the web contributes to its popularity, more so then an inherent superiority of sound.
The Morrison is a direct-coupled design using a 6SL7 so as far as gain it is similar to your present setup, you wouldn’t need to chage your current power supply much. The direct connection strategies are different and you might find this useful for your next build.
The Triodino will have much less gain, probably need a preamp, and the capacitor coupling will sound different. The power supply is different, because the voltage requirements are different. So the Triodino will require more changes then trying out the Morrison.
Matt
- Re: Triodino 2A3 or Morrison Micro 2A3 ? Advice please! - Les Hudson 14:01:17 03/15/07 (1)
  Thanks. I am using a 6H6P preamp that has lots of gain. My simple 6SN7/ 45 is a perfect match as far as gain. If I were to go with the Mossison Micro , I plan to change it to a 6SN7. THanks again.
  - Re: Triodino 2A3 or Morrison Micro 2A3 ? Advice please! - mwiebe 18:07:15 03/15/07 (0)
    Well swapping a 6SN7 for a 6SL7 would not be a Morrison Micro but something else. A tube change in a direct coupled design is not a trivial matter so good luck with the experimentation.
    Matt

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