Which Aikido pre-amp PCB for a newbie? - diyAudio
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Old 17th July 2008, 08:59 AM   #1
Brit01 is offline Brit01  United Kingdom
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Default Which Aikido pre-amp PCB for a newbie?

Hi,

I'd like to build my first valve pre-amp and I'm looking at the Aikido PCB's.
I'm planning to run it into my Yamaha AX-570 (ok not the best I know but I can't afford anything else now). The Yamaha has a pre-out/main-in so I'm assuming I can use this as a power amp.

Now I see several PCB's available on the glassware site but confused as to which one to start with.

I can only buy a PCB board (not a full kit) now as I am sending it overseas and the customs here are very strict. (It has to be under 50 USD).
Planning to buy all components locally.

Please help.

thks
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Old 17th July 2008, 09:39 AM   #2
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If you don't have a lot of tubes of either the octal or noval type. You can just choose anyone of the types..it does not matter that much really.

If in doubt go for the octal boards.
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Old 17th July 2008, 11:26 AM   #3
Brit01 is offline Brit01  United Kingdom
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Thks Bas.

I might just order one of those and see how it goes.
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Old 17th July 2008, 11:31 AM   #4
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Good luck!
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Old 17th July 2008, 01:35 PM   #5
Brit01 is offline Brit01  United Kingdom
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Any recomendations over the valves or components for the Octal?
How much do the valves vary the sound?

I see a variation can be used.



Thks
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Old 17th July 2008, 01:40 PM   #6
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First tube 6SN7 and the 2nd tube 6BX7 is what I would try.
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Old 17th July 2008, 03:44 PM   #7
regal is offline regal  United States
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I would recommend looking at the 12SN7, much cheaper for a first project. Same sonics.
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Old 17th July 2008, 09:37 PM   #8
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Good suggestion. Certainly if you are looking at value for money. In the 12SN7 case it would be best if used in both positions. I don't know if JB's boards support different heater voltages for each socket.
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Old 17th July 2008, 11:16 PM   #9
Brit01 is offline Brit01  United Kingdom
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Stupid question moment.

As I'm a complete newbie to this I have to ask what is the difference between line amp and pre-amp? I assumed they are the same.

Also does the Aikido Octal PCB kit need a separate circuit for volume control and also for the power supply?
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Old 18th July 2008, 01:39 AM   #10
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Do they octals really sound better than the 9-pins? It seems like you'd have a much wider choice of tubes if you went with the 9-pin versions.
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