Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Travis_W on December 23, 2010, 07:41:10 am
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I really appreciate your time and just need an opinion/or how to on something....
I have the first Legacy VL100 Head which only switches down to
50-watts...the new Legacy II will switch down to 25 watts.... :rolleyes:
I want to MOD my amp so it can switch down to 25watts?? or is this possible
with no mods?? Do I just need to switch out the switch...hahaha you know
what I mean.... :laugh:
Thank you for your valuable time as it greatly appreciated. :wink:
Hope this is not an old question....could not find it on this site anywhere... :sad:
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search this site for threads using the term: "Geezer Switch" That may come up with sumthin'...
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If you compare the schematics, you'll notice that the power switches work differently in Legacy and Legacy II.
http://www.carvinworld.com/crg/crg/schematics/VL100F.pdf (http://www.carvinworld.com/crg/crg/schematics/VL100F.pdf)
http://www.carvinworld.com/crg/crg/schematics/30-32201.pdf (http://www.carvinworld.com/crg/crg/schematics/30-32201.pdf)
In your amp the power switch turns off one pair of tubes.
In Legacy II the power switch reduces the supply voltage to phase inverter.
Manual says:
For early power tube saturation move this switch to 50 or 25 watts
but I think it should say early phase inverter tube saturation. :smiley: