The sleeper - Yamaha G100 & Yamaha G50 amps

[edlojaZZguitar]

Hi i need a power transformer for my g100 Yamaha guitar amp?
can somebody tell me if they sell one or where to get it?
edwin

[edge59]

Hello, I am new here and wanted to say hello to everyone! I just picked up another G100112 like I had back in the 80's when I saw Robben Ford using one with a JBL in it, I was amazed with his playing and the tones he was getting from the amp! The one I just picked up has a JBL K120 in it. I mod and build amps so I took a shot with it since I have experience with Dumble and other amps of the like, to see how close to a Dumble I could make it sound. It really is a great amp stock, but I was able to coax more out of it.
It now has more available gain and and goes from mild blues drive to a nice singing overdrive with a sweet sag in it for more 70's-80's Blues Rock Fusion tones. When I get a chance I will record a clip for you all to hear. They sound great stock and take pedals very well, but the JBL or an EVM12L will make them come alive! I think a Eminence Delta series would work very well too! Now I am waiting for a special stereo jack to finish my effects loop. I reworked the bright switch circuit to not be so bright but have more presence and be a little more subtle but usable, I revoiced the tone stack to have a little more open tone like a Dumble/Fender, and re did the overdrive to be very much like a Solid State Dumble ODS, since the Block layout is very much the same. The Mid Shift has been revoiced to not be so honking but FAT like it should be. I installed IC sockets so I can try different opamps like Burr Brown etc. Currently I have NE5532's in the first 2 stages and it sounds more like Mullard ECC83's and the rest are the stock JRC4558 opamps. This amp rocks for solid state!

[gerraguitar]

I have 2 friends who both use a G100 amp for jazz stuff at school...and I don't know, I want to like the amp, but both of the amps have their own separate issues. I realize when you buy amps used they'll have things that need to be brought to spec but still. Recently one of them shit the bed and the other one has problems too, it will just cut out randomly.

Again like I said I want to like the amps, and not to sound like a jerk but I don't think they sound anything like a twin reverb, I use a twin and maybe with a few mods you can get pretty close, but I just don't hear it.

The nice thing I can say about the G100 is that you can get them for a really good price making your own mods more easy. I do have faith that you can make them sound really great, S.S amps are great for jazz tone, but just be cautious I guess is what I'm getting at.

E

[nado64]

I bought a G100-112 mk2 online (100 euros).
But I needed to replace two chips and to clean all contacts (pots, jacks, switches).
I don't know if all it's alright, now. Because, I find the tone stack very strange, the bass are very boomy, too much punch for me when I pick a string.
On the high canal A with the knob volume pulled, I have the bass on 0, the middle on 12 and the treble on 7.
And I find the definition is very muddy, and the sound very 80's.

[dytar]

Hey !

i'm a french drummer and a friend guitarist gave me a couple of years ago a g-50 112 serie I, which is actually in a very good shape. I sold him because i don't have time to learn guitar...

Thanks for the informations here ! And send me a private mail if you want this amp !

Thanks, Fabrice.