supply drop down?

[JimRayden]

Is it normal that when I connect the 9v battery to the Ruby amp, the multimeter says 2,5V across the battery?

Any possible known miswiring?

-----------
Jimbo

[puretube]

...or an empty battery.

[JimRayden]

I have piles of these 9V batteries at home and I always have lots of trouble finding a full one. And yes, for this one the battery is about 8.2V. The dropdown happens when I connect it.

-----------
Jimbo

[JimRayden]

Here comes the wierd stuff... I connected another battery (8,6V) to it and when I turn up the volume, I hear some beautiful oscillation. I actually like that smooth-sounding oscillation but I want it to amplify my guitar, not oscillate. :\

---------
Jimbo

[MartyMart]

Jim, does the battery get "hot" whilst connected ?
If so, there is a short somewhere....
I had a similar problem with a VB 4.5 volt power conection recently, it
was reading less than 2 volts !
There was a "drain" (short) from an opamp connection causing this, once fixed
the VB became normal again.

Marty.

[JimRayden]

yea but the wierd thing is that one battery drops to 2V and the other starts to oscillate. Wierd...


-----------
Jimbo

[JimRayden]

Maybe it's because I changed the volume pot from 10k to 5k?  :?

EDIT: Or maybe because I changed the 1,5M resistor to 1M and 3,9k to 3,3k? These were the closest values I had. Could they be the problem?

------------
Jimbo

[petemoore]

Nope, those alterations won't matter about the V drop thing.