such a Clean Machine - well... almost - Yamaha G100 212 mkIII

[woland99]

I bought Yamaha G100 212 mkIII last nite. Good condition - original
Yamaha JA 3111A speakers but reverb was replaced by Hammond.
Not sure about the year - it is mkIII with parametric EQ - but it does
not have XLR output in the back - just effect loop and -10dB direct
out.
It is VERY clean amp - takes effects well. And is quite loud - turn it
past 2 o'clock and my 335 starts howling back.
I am not crazy bout reverb but that can be fixed. My main concern
is that one you crank it past 12 o'clock there are all kinds of weird
"zings" that start to show up - especially when playing around E or
F/F# on A string and the loder it gets the more notes from same area
get zingy. Any similar experiences? I do not think it is speakers -
I would rather suspect baffle.
Any suggestions will be greatly appreciated.

JT

[woland99]

Well - I tghten speaker mounting screw - those were loose -
you could turn them with your fingers. It helped some - it
is zinging but smoother. Blew around the cones there was not
much dust at all. Took off the grill - baffle looks good - no crack
or anything - that thing is really thick. I tapped around it and it
does not uniform sound but seems solidly mounted inside the
box. Speker cones are spotless.
I let it feedback on 7th fret E and tried touching different
parts and see if it would diminish zinging and notice that at
some point it went into a buzz mode (no guitar feedback)
that stopped once I wiggled reverb jacks. I think that reverb
connection is intermittent and at higher volume it starts
distorting the signal. I will check inside of the chassis next.
The other possibility is that baffle dried out and sits loose
but I guess sbdy with more experience will be a better judge -
first move will be to fix reverb output.

JT

Post by woland99
I bought Yamaha G100 212 mkIII last nite. Good condition - original
Yamaha JA 3111A speakers but reverb was replaced by Hammond.
Not sure about the year - it is mkIII with parametric EQ - but it does
not have XLR output in the back - just effect loop and -10dB direct
out.
It is VERY clean amp - takes effects well. And is quite loud - turn it
past 2 o'clock and my 335 starts howling back.
I am not crazy bout reverb but that can be fixed. My main concern
is that one you crank it past 12 o'clock there are all kinds of weird
"zings" that start to show up - especially when playing around E or
F/F# on A string and the loder it gets the more notes from same area
get zingy. Any similar experiences? I do not think it is speakers -
I would rather suspect baffle.
Any suggestions will be greatly appreciated.
JT

[Joey Goldstein]

Post by woland99
I bought Yamaha G100 212 mkIII last nite. Good condition - original
Yamaha JA 3111A speakers but reverb was replaced by Hammond.
Not sure about the year - it is mkIII with parametric EQ - but it does
not have XLR output in the back - just effect loop and -10dB direct
out.
It is VERY clean amp - takes effects well. And is quite loud - turn it
past 2 o'clock and my 335 starts howling back.
I am not crazy bout reverb but that can be fixed. My main concern
is that one you crank it past 12 o'clock there are all kinds of weird
"zings"

n'yuk, n'yuk

Post by woland99
that start to show up - especially when playing around E or
F/F# on A string and the loder it gets the more notes from same area
get zingy. Any similar experiences? I do not think it is speakers -
I would rather suspect baffle.
Any suggestions will be greatly appreciated.
JT

[woland99]

Post by Joey Goldstein
n'yuk, n'yuk

Post by woland99
Any suggestions will be greatly appreciated.

That last remark does not apply to you, Joey.

JT

[Phil T]

You're the only one here that speaks Joey's language JT.

Post by woland99

Post by Joey Goldstein
n'yuk, n'yuk

Post by woland99
Any suggestions will be greatly appreciated.

That last remark does not apply to you, Joey.
JT

[woland99]

Post by Phil T
You're the only one here that speaks Joey's language JT.

That aint Joey, Phil - that must be Joey on some strong
Canadian beer or some other mind altering substances.

[Joey Goldstein]

Post by woland99

Post by Joey Goldstein
n'yuk, n'yuk

Post by woland99
Any suggestions will be greatly appreciated.

That last remark does not apply to you, Joey.
JT

I think you need to implant 57 Classics into the amp's transformer,
along with an ABR-1 across the input.

[woland99]

Post by Joey Goldstein
I think you need to implant 57 Classics into the amp's transformer,
along with an ABR-1 across the input.

Tried that - also tried killing black rooster and soaking speaker cones

in its blood - it is still zinging. Could it be reverb? I noticed that
it is NOT
inside reverb bag but sortta loosely bolted to bottom of the enclosure
with bag being covering it... I can imagine that with high enough
volume
reverb tank will start moving and affect the tone. Are there any rules
of
placing reverb in the enclosure/

JT

[e***@comcast.net]

Post by woland99
Could it be reverb? I noticed that
it is NOT
inside reverb bag but sortta loosely bolted to bottom of the enclosure
with bag being covering it... I can imagine that with high enough
volume
reverb tank will start moving and affect the tone. Are there any rules
of
placing reverb in the enclosure/
JT

Does the "zing" go away when you turn the reverb down to zero? Does it
get worse when you turn it up? If it looks like it's the reverb, you
could try (if the reverb cables are long enough) unbolting the reverb
and resting it on somthing other than the cabinet and see if that
changes anything.

Hack
--//--

[jaz]

One bit of advice. Get the schematic and make sure you have the right
value reverb pan in there. I had one where someone replaced the pan
with a fender type pan which was the wrong impedance and it blew out a
transistor that wasn't available any more.

Post by woland99
I bought Yamaha G100 212 mkIII last nite. Good condition - original
Yamaha JA 3111A speakers but reverb was replaced by Hammond.
Not sure about the year - it is mkIII with parametric EQ - but it does
not have XLR output in the back - just effect loop and -10dB direct
out.
It is VERY clean amp - takes effects well. And is quite loud - turn it
past 2 o'clock and my 335 starts howling back.
I am not crazy bout reverb but that can be fixed. My main concern
is that one you crank it past 12 o'clock there are all kinds of weird
"zings" that start to show up - especially when playing around E or
F/F# on A string and the loder it gets the more notes from same area
get zingy. Any similar experiences? I do not think it is speakers -
I would rather suspect baffle.
Any suggestions will be greatly appreciated.
JT

[woland99]

Post by jaz
One bit of advice. Get the schematic and make sure you have the right
value reverb pan in there. I had one where someone replaced the pan
with a fender type pan which was the wrong impedance and it blew out a
transistor that wasn't available any more.

Good advice - I will ask previous owner if he did some research before
replacing that reverb. Thanks.

JT

[woland99]

Thanks Jack,
I am almost sure that reverb was replaced by correct one.
According to the only manual that I found online the original
reverb MIGHT HAVE BEEN Accutronic 4EB3C1B
And I just looked inside and sure enuff it's 4EB3C1B inside.
Problem is the manual describes slightly different model of
G100 MkIII - one that had extra XLR output but I seriously
DOUBT they would add XLR and suddenly changed reverb

JT

Post by jaz
One bit of advice. Get the schematic and make sure you have the right
value reverb pan in there. I had one where someone replaced the pan
with a fender type pan which was the wrong impedance and it blew out a
transistor that wasn't available any more.

Post by woland99
I bought Yamaha G100 212 mkIII last nite. Good condition - original
Yamaha JA 3111A speakers but reverb was replaced by Hammond.
Not sure about the year - it is mkIII with parametric EQ - but it does
not have XLR output in the back - just effect loop and -10dB direct
out.
It is VERY clean amp - takes effects well. And is quite loud - turn it
past 2 o'clock and my 335 starts howling back.
I am not crazy bout reverb but that can be fixed. My main concern
is that one you crank it past 12 o'clock there are all kinds of weird
"zings" that start to show up - especially when playing around E or
F/F# on A string and the loder it gets the more notes from same area
get zingy. Any similar experiences? I do not think it is speakers -
I would rather suspect baffle.
Any suggestions will be greatly appreciated.
JT

[invisaman75]

Great amp! I had a G50 112(?). I saw one with 15 on eBay. How are the
pots on your amp? Mine got scratchy and needed to be replaced.

Post by woland99
I bought Yamaha G100 212 mkIII last nite. Good condition - original
Yamaha JA 3111A speakers but reverb was replaced by Hammond.
Not sure about the year - it is mkIII with parametric EQ - but it does
not have XLR output in the back - just effect loop and -10dB direct
out.
It is VERY clean amp - takes effects well. And is quite loud - turn it
past 2 o'clock and my 335 starts howling back.
I am not crazy bout reverb but that can be fixed. My main concern
is that one you crank it past 12 o'clock there are all kinds of weird
"zings" that start to show up - especially when playing around E or
F/F# on A string and the loder it gets the more notes from same area
get zingy. Any similar experiences? I do not think it is speakers -
I would rather suspect baffle.
Any suggestions will be greatly appreciated.
JT

[woland99]

Post by invisaman75
Great amp! I had a G50 112(?). I saw one with 15 on eBay. How are the
pots on your amp? Mine got scratchy and needed to be replaced.

Actually they are all in great shape - push pull mid-boost is noisless.
The only pot that has a litlle scratch is parametric EQ Frequency.
I have Rivera S120 which was about 7 times more expensive and
all push-pull puts there are noisy as hell.
Amp is very quiet. It is very transparent and takes effect very well -
finally I will have some use for that MagicStomp,
I had DG80 112 before - liked that amp a lot except it was not
clean enough - Clean1 and Clean2 channels were too quiet - and
to get any volume going you ghad to dial quite a bit of dirt.
If I can get rid of of those few resonant zings I will be very happy
with that amp. I heard Mike Stern was a big fan of them too,

JT

[Christophe Pinson]

Le Tue, 16 Jan 2007 19:23:42 +0100, woland99 <***@gmail.com> a écrit:

I have a G100 don't know mark I, II or III ... and I have a love/hate
relationship with it. I tend to find it midrangey, as if it lacked bottom
end. Maybe the original JA speaker needs to be replaced. Maybe the 2x12
version sounds deeper, i never seen one.
I also find the High input being too hot, and the Low input being too
low...for humbuckers, i mean. I'm thinking of a variable inpedance input
but don't know how to make this. Recently, I found I had some unpleasant
highs when playing with high gain distortion. I didn't notice that before,
but I used to play mostly clean until I decided ( a bit late, at 42 ) to
prepare for my reincarnation as a hairy guitar hero .

In fact my question is : what difference do you make between zingy and
buzzy ?

[woland99]

Hmmm - diff betw zingy and buzzy - volumes were written on the
subject, people accused of heresy, religious wars waged....
I think that buzzed out tone is tone that is non-usable and does
not clean so easily whereas "zing" is whither shade of "buzz".
Lack of bottom - that may be so - altho I think that useable Bass
control position for playing with band does not exceed 2.5-3.0 or
else you compete with bass player for turf. Solo you can go 5-6
and then definitely bass is there. My amp has only single input
so I cannot comment on High/Low probkem.

JT

Post by Christophe Pinson
I have a G100 don't know mark I, II or III ... and I have a love/hate
relationship with it. I tend to find it midrangey, as if it lacked bottom
end. Maybe the original JA speaker needs to be replaced. Maybe the 2x12
version sounds deeper, i never seen one.
I also find the High input being too hot, and the Low input being too
low...for humbuckers, i mean. I'm thinking of a variable inpedance input
but don't know how to make this. Recently, I found I had some unpleasant
highs when playing with high gain distortion. I didn't notice that before,
but I used to play mostly clean until I decided ( a bit late, at 42 ) to
prepare for my reincarnation as a hairy guitar hero .
In fact my question is : what difference do you make between zingy and
buzzy ?
--
Christophe