jumpering fet switching

thegnu · 19th January 2009, 07:03 PM

I'm trying to convert this TS-5 to true bypass. I'm putting it in a new enclosure with a 3pdt switch, and I need to jumper the FET switching to always on.

Can any of you tell what points to jumper/what parts to remove on the following schematic?
http://www.freeinfosociety.com/elect...ew.php?id=1087

I appreciate any input.
Thanks,
Nathan

mjf · 24th January 2009, 02:11 PM

hello.
is there a flaw in the schematic? inputtransistor tr3 - i am missing an emitterresistor - c8 and c15 block the dc connection .
greetings.........

thegnu · 27th January 2009, 09:06 PM

Hey,
sorry for not replying, I got sick, and have been trying to keep up with school and work. Yeah, I suppose there is quite possibly a problem with the schematic. I was having some trouble following the circuit design based on this schematic, and I figured it was because I was a fool.

I don't know. I'm going to have to figure this out somehow. I did some research, and I know how a basic flip-flop circuit works (I know when Q=1 and Q'=0 is on, and the inverse is off), but I still don't know how you would wire it up to be always on.

What I think (which is admittedly, not worth much) is that in this schematic, Q1 is passing the signal for bypass, and Q2 passes the effected signal. Is that correct? If I want to wire a 3pdt switch, I would just remove Q1 and pass the bypass signal using the switch. Then, jumper Q2, and connect that 9v connector through the switch so the power connects with the switch, right?

Or am I completely misguided?

thegnu · 27th January 2009, 09:06 PM

i don't see how to to edit my post. Anyway, this is what I mean. On all those arrows labeled "to switch" I would obviously have a wire coming back from the switch so that the switch would break lead when I switched it, I just didn't want to draw twice as many arrows.

mjf · 28th January 2009, 09:30 AM

hello.
there are many possibilities,three are shown in the schematic.
be carefully,there can be errors in your orig. drawings.
i would measure up all points with a digitalmm and after that begin to build in or out something.
perhaps it helps...........
greetings.........

thegnu · 28th January 2009, 12:46 PM

@mjf: You are awesome. I really appreciate the time you took to reply to this. I will be careful, and let you know how it goes.

19th January 2009, 07:03 PM	#1
thegnu diyAudio Member Join Date: Jan 2009	jumpering fet switching I'm trying to convert this TS-5 to true bypass. I'm putting it in a new enclosure with a 3pdt switch, and I need to jumper the FET switching to always on. Can any of you tell what points to jumper/what parts to remove on the following schematic? http://www.freeinfosociety.com/elect...ew.php?id=1087 I appreciate any input. Thanks, Nathan

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24th January 2009, 02:11 PM	#2
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. is there a flaw in the schematic? inputtransistor tr3 - i am missing an emitterresistor - c8 and c15 block the dc connection . greetings.........

27th January 2009, 09:06 PM	#3
thegnu diyAudio Member Join Date: Jan 2009	Hey, sorry for not replying, I got sick, and have been trying to keep up with school and work. Yeah, I suppose there is quite possibly a problem with the schematic. I was having some trouble following the circuit design based on this schematic, and I figured it was because I was a fool. I don't know. I'm going to have to figure this out somehow. I did some research, and I know how a basic flip-flop circuit works (I know when Q=1 and Q'=0 is on, and the inverse is off), but I still don't know how you would wire it up to be always on. What I think (which is admittedly, not worth much) is that in this schematic, Q1 is passing the signal for bypass, and Q2 passes the effected signal. Is that correct? If I want to wire a 3pdt switch, I would just remove Q1 and pass the bypass signal using the switch. Then, jumper Q2, and connect that 9v connector through the switch so the power connects with the switch, right? Or am I completely misguided?

28th January 2009, 12:46 PM	#6
thegnu diyAudio Member Join Date: Jan 2009	@mjf: You are awesome. I really appreciate the time you took to reply to this. I will be careful, and let you know how it goes.

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