Early 70's Fender Princeton

[pnut5150]

What kind of cap is this? I have never seen one like these.

[nsubulysses]

They have those in old Ampegs too.

This should help

[pnut5150]

Maybe I can find a schematic to tell me what to replace it with

[The Dude]

Ok,......, I'll bite,...... why are you replacing it?

[52 Bill]

Maybe I can find a schematic to tell me what to replace it with

That's what some refer to as a "tropical Fish" cap, because of the color stripes. That is a 223 or 0.022uF cap.

From the position in your photo it is part of the vibrato phase shift oscillator circuit.

Why do you want to replace it?

[nsubulysses]

Maybe he is asking what brand? Or if it's polyester/polyproplylene like an orange drop, or another material, and what not?

[nsubulysses]

As an aside, I sometimes replace these on old ampegs because the casing has dried and cracked. Why do you never see an old orange drop with it's "dip" cracked? Is it because of the harsher heating/cooling fluctuation in the chassis of old Ampegs or is it a brand/manufacture thing? I dug a few out



Double aside, should I put all the dried, cracked vintage caps I've collected into all my own amps for true extra mojo????

[g1]

As far as I know, that cracked plastic is just a coating. I look at it as paint. Most of the old ones I see are cracked but always check out good.
I think the orange dip is just some different plastic type that doesn't crack, but I don't think that means the caps are any better.

[nsubulysses]

Not sure, but I read somewhere to be careful not to bend the leads too much and crack the casing when placing dipped capacitors because the dipped package protects the capacitor from absorbing moisture from the air.

[pnut5150]

Well one to the left of this one is broken completely into..this one was a better picture..was hoping for more info on material, maybe even a common value used in vintage Fenders.

[Tom Phillips]

...was hoping for more info on material, maybe even a common value used in vintage Fenders.

Can you post additional photos. Show more of the parts board so we can see where the cap is in the circuit. Can you date more accurately than "early 70's? Maybe show a pic of the tube chart glued to the side wall of the cabinet.

[pnut5150]

Sure, this is a drip edge..could be a late 68' or 69' didn't see the drop edge till after I posted

[Jazz P Bass]

There is 'no common value'.

The value is circuit dependent.

[pnut5150]

Right, but there is only two of these, I figured some of you guys that have been doing this a long time may have the. Memorized..I'll post more pics

[Tom Phillips]

Right, but there is only two of these, I figured some of you guys that have been doing this a long time may have the. Memorized..I'll post more pics

Fender amps a full of build and parts variations. That tropical fish type capacitor was not commonly used by Fender. Based on the look of the solder joints I think it is original so I believe that Fender had run out of their normal stock and sourced that cap during the time your amp was built. I could figure it out but it would take a while with only your close up photo. Best to see the whole picture...literally.

There are tow of them? Let's see high rez photos of the whole amp.