24 or 24a as driver in 2 stage..? - diyAudio
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Old 29th December 2008, 01:20 PM   #1
JandG is offline JandG  United States
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Default 24 or 24a as driver in 2 stage..?

Has anuone tried this 24 or 24a tetrode as driver in 2 stage amp..? I have read somewhere on asian DIY site that it worked & worked well on a 2 stage 2a3 amp. I have yet to get more details on this, hopefully I will. I have alot of 24 & 24a & would like to try 2 stage with them. Any suggestions on this..?
Thanks J & G
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Old 29th December 2008, 01:38 PM   #2
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The original Loftin-White used the 224 as the input tube. Follow the links...

Click the image to open in full size.

http://www.studiomaudio.info/loftinwhite.html

http://mikesradios.googlepages.com/article.html
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Old 29th December 2008, 07:11 PM   #3
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24 works quite well - 'though some can be microphonic.
Keep the voltage on the screen low for best sonics.
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Old 30th December 2008, 12:43 AM   #4
mach1 is offline mach1  Australia
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Thorsten posted a detailed dc coupled 24 / 45 design tutorial here some time ago. Check the archives.
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