Gibson GA-55v A friend gave me her dad's amp!
Posted 12 November 2012 - 11:21 AM
From doing research, I've found that they made this amp between 1954 and 1958, shipping only around 480. It has a nifty little vibrato unit that plugs directly into your guitar's output and has a switch along with two controls, "frequency" and "intensity"
The only source codes I've found so far are on the speakers, which are both Jensens--one made in '55 and the other in '54. There is also a code stamped on the transformer, but I cant make it all out, and spent the last couple hours playing her....so she's rather hot...I'll hopefully get in there later after everything cools down.
Sorry, I just had to vent my excitement to someone because my girlfriend thinks I'm a nut-ball.
Getting to the things I'm curious about: 1) Does anyone have experience with this amp....because finding information on this guy is pretty hard. My TUBE AMP BOOK doesn't even have the schematic for it.
2) It clearly says ninety-something watts but every resource says it is only 18. I'm just curious about this....I really don't care what the wattage is.
3) Anyone know where I can find a user/service manual for it
Any help would be greatly appreciated. Thanks
Posted 15 November 2012 - 09:29 AM
The little box I'm holding is the vibrato unit (missing a knob). It's wired into the first instrument input and from the research I've done, Gibson decided not to include the V model or the schematic for the vibrato unit on the amp schematic because so few were made. If anyone could verify that information...it would be awesome.
I found this one Guitar Center's Vintage page....the description says GA-55TV...but if you look below the standby knob it clearly says Ga-55 V. Looking at the upper right picture, the little black box mounted below the back panel is the vibrato unit. It plugs in to a 1/4" jack mounted inside the back panel but the jack just has its lugs wired together so it doesn't go anywhere. The wire coming out of the unit is what's wired into the first input. I don't know if this is done so you can plug into the first input and still use the vibrato....I'm really not sure.
Guitar Center Gibson GA-55v
Anymore information you may have would be appreciated. Thanks
Posted 16 January 2013 - 09:58 AM
I originally though the amp had Jensen field coils in it because there's a transformer mounted on one of them, but it's actually the OT. Had I taken the time to read....I would've noticed the speakers have "PM SPEAKER" written directly on the magnet cover.
Again, thanks in advance
Posted 29 January 2013 - 03:39 PM