Ibanez - JD-9 Jet Driver [schematic]
- Greenmachine
- Cap Cooler
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Enter Dirk Hendrik in 3 ... 2 ... 1 ...
"[Y]ou want sketchy, dude? I breadboard on a door." -- RnFR, 2011
"This amp is freakin loud, like crazy, I'm going to kill pets loud." -- mich, 2011
"This amp is freakin loud, like crazy, I'm going to kill pets loud." -- mich, 2011
- Greg
- Old Solderhand
According to a Premier Guitar review:
"The Mid control is the most obvious—and welcome—addition to what you’d consider a standard TS circuit."
"The Mid control is the most obvious—and welcome—addition to what you’d consider a standard TS circuit."
culturejam wrote: We are equal opportunity exposure artists.
- Dirk_Hendrik
- Old Solderhand
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Sorry. Different timezones. I had to wake up firstGreenmachine wrote:Enter Dirk Hendrik in 3 ... 2 ... 1 ...
Thanks for the pics. First time I see one so I cannot say that much, other than that the first thing to check was wether one of the pots was a dual. In that case chances would be good we were looking at a resurrected Super Tube. But that does not seem to be the case.
The blank space in the middle of the 4 knobs is begging for a switch or another pot. I'm thinking of adding bass boost with a capacitor on a mini toggle across the 0047uf cap (in the OP's picture it's the silver cap in the middle of the board above IC on the right). Will that work?
- Dirk_Hendrik
- Old Solderhand
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Huh!?
You can tell the function of a cap from a photo without being able to see how it's connected?
You can tell the function of a cap from a photo without being able to see how it's connected?
- analogguru
- Old Solderhand
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Of course: the described capacitor is part of the "MID"-control. But I can´t tell you how a change of the value should influence the bass-response. BTW, the capacitor isn´t .0047µF, it is .047µF.Dirk_Hendrik wrote:Huh!?
You can tell the function of a cap from a photo without being able to see how it's connected?
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Dirk_Hendrik
- Old Solderhand
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Thanks!
Drawing that schem will not be that much a problem. However, knowing the external wiring to the pots would come handy.
Drawing that schem will not be that much a problem. However, knowing the external wiring to the pots would come handy.
- Dirk_Hendrik
- Old Solderhand
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to be continued,
What is under that blob of white rubber glue on the solder side?
What is under that blob of white rubber glue on the solder side?
- tube-exorcist
- Resistor Ronker
green solder stop and then a ground plane (made from copper), then some glue and pertinax.Dirk_Hendrik wrote:to be continued,
What is under that blob of white rubber glue on the solder side?
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."
- Dirk_Hendrik
- Old Solderhand
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Consider that question obsolete.
The more helpful answwer would be "a resistor". I had to revert to the JD9 to check for sure.
The more helpful answwer would be "a resistor". I had to revert to the JD9 to check for sure.
- tube-exorcist
- Resistor Ronker
Do you expect from me that I should lie ? I mean, what can I do - there is simply no resistor (at least in my unit):Dirk_Hendrik wrote:Consider that question obsolete.
The more helpful answwer would be "a resistor". I had to revert to the JD9 to check for sure.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."
- Dirk_Hendrik
- Old Solderhand
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And there has been another time where a certain Tube-Exorcist or his alter ego was absolutely sure he was right while there happened to be a post production mod later. Someting with an Ibanez Noise Buster if I remember correct. It took him a lot of effort even to admit that 2 parties could both be right.
Meanwhile, while drawing up a circuit diagram, intended to be posted here, I use the information I get provided by my forum members. That means I cannot revert back to "my suddenly appeared personal" unit. I do not have any. That also means I have trouble with suddenly appearing (partial) pictures to prove a case but nothing else.
We've been through this discussion before. I bail out. I have no interest in such a discussion anymore.
Meanwhile, while drawing up a circuit diagram, intended to be posted here, I use the information I get provided by my forum members. That means I cannot revert back to "my suddenly appeared personal" unit. I do not have any. That also means I have trouble with suddenly appearing (partial) pictures to prove a case but nothing else.
We've been through this discussion before. I bail out. I have no interest in such a discussion anymore.
- tube-exorcist
- Resistor Ronker
Oh BTW - may be helpful - this jack is wired to the footswitch. So if there should be a resistor, maybe someoane added a pulldown resistor or so.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."
- tube-exorcist
- Resistor Ronker
- tube-exorcist
- Resistor Ronker
- Dirk_Hendrik
- Old Solderhand
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Pulldown....
And in your unit RLED is replaced by a jumper wire as well? Guess not.
And in your unit RLED is replaced by a jumper wire as well? Guess not.
- Dirk_Hendrik
- Old Solderhand
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Thanks for the values. I had the connections already.tube-exorcist wrote:Oh and before I forget it, here are the potentiometer connections:
Standard hi, gyrator mid tone control.
- tube-exorcist
- Resistor Ronker
I didn´t trace that part yet, therefore I don´t know. But looking at the pictures now it appears to me, that the "resistor" (jumper ?) is from LED-kathode to ground - obviously to induce a small current in the off-state to avoid popping... same effect as what wil be cured by a pulldown.....Dirk_Hendrik wrote:Pulldown....
And in your unit RLED is replaced by a jumper wire as well? Guess not.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."