Moderator: VelvetGeorge
Josh, you should be able, to simply imagine the Master pot after the Treble control and then instead of to go from the Treble's wiper into the loop section then go from the Master's wiper into it. If you can't imagine this, then I'm wondering, how you're able to buildt the loop section into your amp.joshwilson3 wrote:Is there anyway you could do a pdf file of your parallel loop in a 2203 circuit?
Usually no hiss/hum will occur with the Preamp Volume on zero, but this depends on the quality of your preamp layout, grounding, aso. The loop section i.e. doesn't make a hissing or humming V2 quitejoshwilson3 wrote:With the preamp on zero, would it be about the same as if I had the 820K/180K conjunction switched to ground? Or could there still be some hiss/hum in the signal?
When you're using a relay for the DPDT loop bypass switch and a on-off-on toggle switch with the center pin to ground, then you may switch the relay on pos. 1 and the conjunction on pos. 3joshwilson3 wrote:If so, I'll probably go ahead with the switch at the 820K/180K conjunction to ground. If this is needed, would there be anyway I could get all of this on one 3-way mini switch?
I was thinking something like:
Loop on
Loop off
Loop on with 820K/180K conjunction to ground
Shaker wrote:Larry, A big thank you for this loop. I built it on a 2203 amp and it works really, really well !
jerrydyer wrote:JUST WANT TO POST A THANX TO LARRY. I love my loop.
Shure! Already sent!marlin wrote:Hi!
Can i get a schematics too? Even though this is my first post?
You are right, I have no idea what is going on. I will be having George build my 2203 clone later this year. Right now I've got a rear panel template in Corel Draw I'm messing with as I'll have to get a custom rear panel made. I'm also getting a custom chassis made.novosibir wrote:Josh, you should be able, to simply imagine the Master pot after the Treble control and then instead of to go from the Treble's wiper into the loop section then go from the Master's wiper into it. If you can't imagine this, then I'm wondering, how you're able to buildt the loop section into your amp.
I'm guessing a "relay for the DPDT loop bypass switch" and a "on-off-on toggle switch" you are talking about is the same thing? I read that to mean two seperate things, but I'm guessing you are just talking about me using ONE on-off-on DPDT toggle switch?novosibir wrote:When you're using a relay for the DPDT loop bypass switch and a on-off-on toggle switch with the center pin to ground, then you may switch the relay on pos. 1 and the conjunction on pos. 3
The schem of the loop with true bypass I've already sent you. When you instead of the DPDT switch use a relay, then you may switch the relay via footswitch. A 12V power supply for the relay you can feed from the bias winding in a 100W amp.thinlizzy wrote:Is there an easy way to include a relay into the loop, so I can use a footswitsch to switch the effectloop on and off?
So if I understand correctly, putting the whiper off the send level to ground is enough to kill the signal that goes to the effects? No problems with Cabel lengts.novosibir wrote: But when you only want to switch the effect on/off, it's reasonable to simply switch the Effects Send to ground, so that reverbs and delays won't be awful cut off, as it would happen with the true bypass!
In this case simply place a second Send parallel the the other one and go from there to a footswitch. No problem, to shunt the Send to ground and no problem with high losses, because the Send is low impedance!
Larry
No! That would make the amp dead quite with the Send Level dimed!thinlizzy wrote:So if I understand correctly, putting the whiper off the send level to ground is enough to kill the signal that goes to the effects?
Oke I understand now, its the same principle as the on/off switch in the guitar cord.novosibir wrote:No! That would make the amp dead quite with the Send Level dimed!thinlizzy wrote:So if I understand correctly, putting the whiper off the send level to ground is enough to kill the signal that goes to the effects?
The signal to the Send jack must be shunted to ground!
Larry
Larry, I understand the switching jack on the return but I'm just wondering why you specify one for the send as well?novosibir wrote:By any means insulated jacks, because they usually will be located close to the OT secondary ground - otherwise with non insulated jacks it might occur a 'put-put' like ground oscillation. Also the tips of the jacks have to be grounded when nothing is plugged in (switching jacks)!
That was just to make it foolproof, because some people sometimes tend to confuse one with the other. Nothing bad happens, when the Send is grounded when unused - but you're right, it's not necessary to ground the unused Send (tip), because it's a low impedance output.jreinhard wrote:Larry, I understand the switching jack on the return but I'm just wondering why you specify one for the send as well?
