Identify This Part?

[KevinSTP]

I have a few of these and I don't know what they are :oops: Black,about 3/8" in diameter,1/8" thick like a pill.Markings-on one side FR2,on the other side  25   is it a diode?
               06

[Boofhead]

It would help if you tried measuring the device with your multimeter.  Use all ranges: Resistance, Capacitance, and Diode, try the meter leads in both directions.  This will help narrow down the options.  If you get wierd readings just make-up a table.

How do the leads connect to the device, axially (like a resistor) or radially like a cap?  If radial, can you see the wires under the epoxy?

It could be a diode, it could be a cap, it could also be some type of fusing device.  Some of these options will be include or excluded depending on your meter readings.

[Peter Snowberg]

I've seen low voltage varistors and fuses in that style package. If the meter says that it has about zero resistance, I'm going ot guess a fuse. It might also be a thermistor. If you get a resistance of more than zero, try holding your finger on it for a few seconds and see of the reading changes.

-Peter

[KevinSTP]

The body looks like bakelite with axial leads.One lead has a red mark The FR2 is embossed around a ring with what looks like a dollar sign in the center.on the other side along with the numbers is a transistor character.I put 2 in series along with an LED in my DS-1 and get more fuzz than I want but mucho dynamics and sustain.I'm trying to tone down this pedal but seem to have too much drive no matter what I use for clipping diodes.