FX loops coming to Metro.

[MaximumGtr]

Great, Steve! I'll add it to my order.

Thanks for all of your help here and around the forums. I'm pretty much new at this, so reading your posts has been very educational for me.

Cheers!

[thechrisl]

Hi all, I read through this thread and saw my question touched on a bit but I'm still not clear on something.

I have a couple amplifiers that I would like to be able to mix and match pre/power sections. Instead of using strictly for FX, it seems the Zero-Loss could be used for that purpose.

For example, one amp is a Peavey Roadmaster with a big clean power section (4x 6550 200W) but a so-so SS preamp. Meanwhile I have a small 5W amp kit with a nice british tube pre & tone stack. Both amps have Master Volumes.

So is it possible I could install a kit in each amp and then pass signal from the 5W pre to the Roadmaster power section? I realize layout and circuit design are a factor, I just want to make sure I'm not completely off my rocker.

If all this holds true, how about taking a Peavey Classic 30 (which has an FX loop already) and doing the same thing -- running from the CL30 preamp to the modded Roadmaster power section?

[rd2play]

I have the loop and want to install it in this 2204 clone: http://ceriatone.com/images/layoutPic/m ... iatone.jpg

Could anyone please tell me where the 10k resistor turret is on the board? I'm asking about the turret/resistor to which the loop board connects (through the decoupling resistor).

Is it the turret/10k 2W resistor connected to C on the board ? If yes, then there is no second resistor to replace as per step 15 in the instructions, right...? Thank you

[axeman]

Yes, that would be the decupling resistor. The instruction does mention the single decupling resistor and what to do. Leave as or replace with a 8.2K resistor. I you continue to have problems bring it over, I'm in Bellflower.

[rd2play]

Yes, that would be the decupling resistor. The instruction does mention the single decupling resistor and what to do. Leave as or replace with a 8.2K resistor. I you continue to have problems bring it over, I'm in Bellflower.

Great, thanks

Now I'm wondering... Should I connect the loop board resistor to the C end of the 10k resistor, or the other end (the choke end)?

[axeman]

Choke end.

[rd2play]

My board is revision 3A, and the guide for 3A says to use a 75K decoupling resistor for 429V (my voltage).

However, my kit is missing exactly the 75k resistor... Since I don't have a 75k, can I use a 68k? I probably shouldn't, but I was all fired up the finish it this weekend, and now I have to wait...

[rd2play]

My board is revision 3A, and the guide for 3A says to use a 75K decoupling resistor for 429V (my voltage).

However, my kit is missing exactly the 75k resistor... Since I don't have a 75k, can I use a 68k? I probably shouldn't, but I was all fired up the finish it this weekend, and now I have to wait...

I think I'm gonna use a 68k and a 8k in series instead of the 75k.

[axeman]

Go ahead I would like hear and see what it does, if I were you would read and learn the instruction to heart.

[rd2play]

if I were you would read and learn the instruction to heart.

I did.

The two resistors in series give me 76k instead of 75k. I will use them and keep an eye on the voltage during the testing period.

[rd2play]

It sounds great No tone loss.

[thechrisl]

Hi all, I read through this thread and saw my question touched on a bit but I'm still not clear on something.

I have a couple amplifiers that I would like to be able to mix and match pre/power sections. Instead of using strictly for FX, it seems the Zero-Loss could be used for that purpose.

For example, one amp is a Peavey Roadmaster with a big clean power section (4x 6550 200W) but a so-so SS preamp. Meanwhile I have a small 5W amp kit with a nice british tube pre & tone stack. Both amps have Master Volumes.

So is it possible I could install a kit in each amp and then pass signal from the 5W pre to the Roadmaster power section? I realize layout and circuit design are a factor, I just want to make sure I'm not completely off my rocker.

If all this holds true, how about taking a Peavey Classic 30 (which has an FX loop already) and doing the same thing -- running from the CL30 preamp to the modded Roadmaster power section?

...bump...

[rd2play]

Hi all, I read through this thread and saw my question touched on a bit but I'm still not clear on something.

I have a couple amplifiers that I would like to be able to mix and match pre/power sections. Instead of using strictly for FX, it seems the Zero-Loss could be used for that purpose.

For example, one amp is a Peavey Roadmaster with a big clean power section (4x 6550 200W) but a so-so SS preamp. Meanwhile I have a small 5W amp kit with a nice british tube pre & tone stack. Both amps have Master Volumes.

So is it possible I could install a kit in each amp and then pass signal from the 5W pre to the Roadmaster power section? I realize layout and circuit design are a factor, I just want to make sure I'm not completely off my rocker.

If all this holds true, how about taking a Peavey Classic 30 (which has an FX loop already) and doing the same thing -- running from the CL30 preamp to the modded Roadmaster power section?

...bump...

Generally, this can be done without any problems. Connect the external preamp unit to the amp's FX return.

I don't see why this wouldn't work with the Zero-Loss, but since my knowledge about input/output impedance is limited, hopefully someone more knowledgeable can chime in.

[SDM]

Hi all, I read through this thread and saw my question touched on a bit but I'm still not clear on something.

I have a couple amplifiers that I would like to be able to mix and match pre/power sections. Instead of using strictly for FX, it seems the Zero-Loss could be used for that purpose.

For example, one amp is a Peavey Roadmaster with a big clean power section (4x 6550 200W) but a so-so SS preamp. Meanwhile I have a small 5W amp kit with a nice british tube pre & tone stack. Both amps have Master Volumes.

So is it possible I could install a kit in each amp and then pass signal from the 5W pre to the Roadmaster power section? I realize layout and circuit design are a factor, I just want to make sure I'm not completely off my rocker.

If all this holds true, how about taking a Peavey Classic 30 (which has an FX loop already) and doing the same thing -- running from the CL30 preamp to the modded Roadmaster power section?

...bump...

Generally, this can be done without any problems. Connect the external preamp unit to the amp's FX return.

I don't see why this wouldn't work with the Zero-Loss, but since my knowledge about input/output impedance is limited, hopefully someone more knowledgeable can chime in.

Been trying to locate a schem for the '70's Roadmaster SS preamp version, but no luck so far. Main problem there (as to adding a loop in it) is that I think the PI is SS too, so not sure if a ZL loop would fit in too well, what signal levels or such are involved there and other details I'd need to know.

That said, it may be possible to achieve what you'd like here with no loops (at least with the amps you listed and just for using the Peavey strictly as a poweramp with them). Possibly would just need a power amp in for the RM, preamp out for 5 watter (likely attenuated since Peavey is SS through the PI), use loop send of C30, but cannot really verify anything until I can get a hold of that RM schem unfortunately.

[herbvis]

in the installation pics, the shielded cables from the loops swich to the pots are ran over the board. is it ok to run them underneath?