[sdiy] Tube!

[Ian Smith]

Thanks Tom, I'll look into that.

----------------------------------------
> CC: synth-diy at dropmix.xs4all.nl
> From: tom at electricdruid.net
> Subject: Re: [sdiy] Tube!
> Date: Sat, 2 Aug 2008 18:02:28 +0100
> To: taciturn_unquiet at hotmail.com
> 
> 
> On 2 Aug 2008, at 17:18, Ian Smith wrote:
> 
>>
>>
>>> That goofy tube only has a gain of 13. I'd say use at least a  
>>> 12au7 with
>>> realistic (200v+) plate supply so you'll have some headroom.
>>
>> Well, I was going for the 12V tube because I want it to work with  
>> the voltages provided by the main power supply and not have to wire  
>> up a second supply for high voltage, but I suppose if I really want  
>> an old tube amp sound, I should use the high voltage stuff.
>>
>>> What do you plan to do with it? Use it as a buffer stage?
>>>
>>
>> I just want something on the output that will give the synth that  
>> nice tube warmth.
> 
> You should have a look at the PAIA tubehead schematics, Ian.
> 
> 	http://www.paia.com/manuals/
> 
> It uses a voltage-booster circuit to generate a 45V supply from 15V,  
> and then runs the tubes (12AX7s) from that. The low plate voltage is  
> beneficial here. There's a great  page that explains how this  
> "starved plate" tube circuit works:
> 
> http://www.paia.com/ProdArticles/tubesnd.htm
> 
> It's a great circuit.
> 
> Regards,
> Tom
> 
> 

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