Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: DummyLoad on March 04, 2016, 02:15:25 pm
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picked this up last night. it's spin on the gibson GA-30RVT invader of the crestline variety. same as the invader except no mid freq. controls on either channel.
i'll post gut shots later, link below to pics.
https://www.dropbox.com/sh/u7os3r22vtu4e9b/AAAmDy6u8Bmgd_W403mlYcqja?dl=0 (https://www.dropbox.com/sh/u7os3r22vtu4e9b/AAAmDy6u8Bmgd_W403mlYcqja?dl=0)
--pete
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gut shots added. click link below.
https://www.dropbox.com/sh/u7os3r22vtu4e9b/AAAmDy6u8Bmgd_W403mlYcqja?dl=0 (https://www.dropbox.com/sh/u7os3r22vtu4e9b/AAAmDy6u8Bmgd_W403mlYcqja?dl=0)
looks like it has an accutronics reverb tank. tank input measures 168R and tank output measures 175R. seems odd as this has a transformer drive. input and output jack shields are tied to tank, e.g. they are not isolated.
1 cap is not well and it looks like the tremelo opto-coupler has been worked on. otherwise appears to be all original.
love the semtech dual diode common cathode hybrid. the 20/20/10 can with flying leads is bummer. going to have to build a brick.
--pete
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almost finished.... the electrolytic trio can for the preamps is all that's left. sounds really nice. it will some guitarist a nice blues amp.
pics later.
--pete
EDIT: pics added.