Ceramic capacitors for guitar amp?

[AmberB]

Hello,
A question, do people still use ceramic capacitors in the preamp of their guitar amp builds?
If not, why not?

I was just given a bag full of .02 at 1000 volt ceramic caps...

[Stuff4bikes]

Microphonic by nature, can be good can be bad......the guitologist on YouTube says a ceramic cap early in the circuit gives extra grit to the sound....

[Blueboozer]

Try it. Experiment. You might find “That” tone

[sluckey]

I used 3 ceramics in one of my last builds.

     http://sluckeyamps.com/smoky/4.jpg

[Latole]

I also use few on my builts.

[sluckey]

I was just given a bag full of .02 at 1000 volt ceramic caps...

Build a lot of tremolo oscillators. No way to affect your tone.

[pdf64]

Ceramics are made using several types of dielectric material, resulting in at least 2 classes of cap. eg class1 high stability low loss, class2 low stability high volumetric efficiency.
So lumping them all together isn’t a good way to proceed.
At a guess, the caps you’ve got may be class 2.
https://en.m.wikipedia.org/wiki/Ceramic_capacitor

[AmberB]

Ceramics are made using several types of dielectric material, resulting in at least 2 classes of cap. eg class1 high stability low loss, class2 low stability high volumetric efficiency.
So lumping them all together isn’t a good way to proceed.
At a guess, the caps you’ve got may be class 2.
https://en.m.wikipedia.org/wiki/Ceramic_capacitor

They are the standard brick red disk caps.  The writing on the cap is as follows
Y5U
103M
1 K V
KCK

probably class 2...
I have hundreds of them if anybody needs any...

[thetragichero]

so those are 10nf 20% tolerance caps (103M)
y5u is the dielectric, here's a table from wikipedia

[Willabe]

Here's a post from PRR on ceramic caps;

https://el34world.com/Forum/index.php?topic=19534.msg203059#msg203059

Here's the start of the thread on if coupling caps sound different;

https://el34world.com/Forum/index.php?topic=19534.0

[bmccowan]

Valco used a lot of ceramic caps and their circuits all sound good to me.