Ceriatone Forum

my 1987 first come with fx loop mod(not interrupt style)
but when i use it,it will decrease so much gain and treble of tone.
nik say it is normal,so i just can use pedal in front of amp,not in fx loop.
over 2 years,i buy a g sharp and hope to use it on loop(because g sharp'tone is suck if use in front of amp)
so i check schematic and change wire for interrupt fx loop.
But it still the same!!althrought i turn the g sharp's input gain up to max.
it still lost so many tone,my friend tell me i must use buffer if i want to use FX UNIT in loop.
does Klein-ulator working??or i find metroamp has a fx loop kit too.
it seems to be using a op or tube to boost the singal??
what's everybody's way to use fx loop without tone lost?

THANKS~

How is your effects loop NOT an interrupt loop.

It's either an series interrupt loop or it's a buffered loop.  Either can be series or parallel.

Buffered loops use op-amps or tubes to buffer both the send and return signals, and this allows you to add a pot to either to control output/input level.  The Kleinator is is an outboard buffered loop.

my 1987 first use http://www.ceriatone.com/images/mods/FX-Loop.jpg (http://www.ceriatone.com/images/mods/FX-Loop.jpg) style fx loop
i don't know why it doesn't use interrupt style loop at first.
so i have to use buffer........does anyone have a schematic?? ;D

That is an interrupt loop, Nik shows a few different loops for different models, but they are all interrupt.  It interrupts the circuit right before the phase inverter to allow you to insert effects.

Buffered loops are definitely more friendly for both pedals and rack gear.  Otherwise it's all a matter of either the gear works at the line-level signal the amp is putting out.

Ultimately....you can install the metro kit and have a SS buffer; se the Klein-uator for an outboard buffer; Weber sells a parts kit with a suggested schematic for a tube-buffer loop; Fuchs has some options; and there are various other kits out there.  There is easily enough room in a 1987x chassis to install something permanent.

On the cheap, I've had success merely using one of these as by FX loop buffer.  They aren't made anymore, but usually go for dirt cheap.  I just nulled out the gate controls.
(http://www.noisefx.com/images/products/dodgateloopfx30b_4502_large.jpg)

The Boss LS-2 is the Boss equivalent that should offer the same functionality and allow you a Return level control.
(http://www.maxguitarstore.com/store/products_pictures/bossls2.jpg)

ok,i see..
thanks for reply ;D!!

i just think about a idea~
i can use my mixer to do this "buffer" thing??
usually mixer have aux function right?