Devolt and one spot issues

[Organtis]

So this is my first build and it couldn't get easier.  But I made a devolt with a 10k pot and it works great on my big muff with a radio shack power supply.  I have measured it with a 4 volt drop and it sounds great. But when I use it on my one spot it doesn't lower the voltage at all.

I'm scratching my head.

[R.G.]

It would really really help if you had posted links to the schematic for the Devolt (I have no clue what that is, although maybe I should) and for what you're trying to do.

I'm scratching my head over what it is you're doing.

[Organtis]

Basically a battery sag Simulator.

http://www.experimentalistsanonymous.com/diy/Schematics/Power%20Supplies%20and%20Other%20Useful%20Stuff/Series%20voltage%20sag.gif

[R.G.]

(1) Who was the manufacturer of your one spot? Should be on the label of the one spot.

(2) Where exactly are you measuring the voltages? In the "devolt"? At the pedal's terminals?

(3) Is there any chance you metered the wrong places?

[mth5044]

RG - does someone else besides Visual Sound make 1Spots?

[stallik]

(1) Who was the manufacturer of your one spot? Should be on the label of the one spot

RG, are you asking this because there might be clones out there? Am about to order a couple and really want the real thing

Edit: mth beat me to it.....

[R.G.]

We keep running into this at the support desk at Truetone (which is the new name for Visual Sound).

People call up or email complaining that their "one spot" is doing ugly, nasty things to their pedalboard. We ask them who manufactured their "one spot" and we get the most amazing variety of answers.    Apparently, the music world has come very close to making "one spot" be a word for any 9V adapter that only blocks one position on a power strip.    Not surprisingly, the - um - quality varies on the results.   

That's why I asked in such an offhand manner. Pure Pavlovian conditioning.

I have not yet found a knockoff that's actually violating the trademark by labeling it "1Spot" or perhaps even copying the actual manufacturer's label, but given the prevalence of copies, I don't think that's out of the question, either.

In any case, no, I don't know of any counterfeits if the label reads the right thing. Yet.

I really think it's a measurement or connection error, but I have to do my own due dilligence.

[Organtis]

Thanks for all of the responses today.  It is a visual sound one spot.  I was 100% convinced last night that the led would not even dim,  but tonight it seems to work correctly.

The only difference I can tell is the rs supply is only 300 mA and the one spot is much larger. Not sure if the 1spot has some kind of regulation either,  but if I can't figure out how to recreate the issue then it is done with.

P.S. I'm new here thank you for humouring in a noob. 

[Organtis]

BTW speaking of truetone,  I think the jekyll and Hyde pedal is so amazing I bought it twice......  Sellers remorse.

[R.G.]

Thanks for all of the responses today.  It is a visual sound one spot.  I was 100% convinced last night that the led would not even dim,  but tonight it seems to work correctly.

The only difference I can tell is the rs supply is only 300 mA and the one spot is much larger. Not sure if the 1spot has some kind of regulation either,  but if I can't figure out how to recreate the issue then it is done with.

The Visual Sound 1Spot is regulated. It's 9.3-9.5V at up to 1700ma, pretty much rock solid. Somewhere over 1700ma the protection circuits decide that there is an overload on it, and it shuts down, then tries to come back up about every second or two to see if the overload is gone.

The reason I asked about measurements and where you measured is that I have on occasion convinced myself that something impossible was happening. 

P.S. I'm new here thank you for humouring in a noob.

We were all newbies once. Welcome on board.