Definitely...I would NOT recommend using an overdrive pedal in an effects loop.
While we're talking about OD pedals, what is everyone's opinions on the difference in the Maxon models: OD-808, OD-9, and OD-820?
I know that the 820 and OD-9 feature true bypass, not the OD-808...and supposedly the OD-808 is just like the older TS-808 circuit, including the JRC4558D chip. However, these newer chips have been proported to be a little less smooth and a little more edgy than the older ones. Also to note, a few buds who have opened up the OD-808 said that circuit (despite their claim) and output resistors actually matches the TS-9, only with the JRC4558D chip in place of the tone sucking Toshiba chip that Ibanez now uses.
The most interesting thing here is that the OD-9 actually seems pretty damn close to the TS-808, and utlizes the same output resistors as the original TS-808. Quite interesting that the OD-9, supposedly modeled after the TS-9 appears more like an original TS-808 at times where as the OD-808, supposedly modeled after the TS-808, ends up appearing more like a TS-9/TS-10 at times (with both Maxon models employing the JRC4558D chip instead, of course) .
I'm interested to hear the opinions of the everyone on these 3 pedals if you have them and have used them. Andy, you've been using the OD-820 for a while haven't you...how do you like it it comparison to the other OD pedals you've used?