Acceptable tolerance?

[ducati2]

I just purchased some sprague atom caps that are labeled 2000uf 25v. My ESR TESTER SHOWS LOW ESR, But my capacitor tester shows them at 2700uf. Is this normal tolerance?

 

[petes'picks]

Atom can be-10% +75% depending on model. If the Df and esr look ok I wouldnt worry about it. Most every new cap I purchase test below marked value. 75% would be 3500uf and still be considered in tolerance.

https://www.mouser.com/ProductDetail/Vishay-Sprague/TVA13182?qs=/ha2pyFaduheRo4h3zOOgLzggc7O5NDsoL3FYe64nFc=

 

[ducati2]

Atom can be-10% +75% depending on model. If the Df and esr look ok I wouldnt worry about it. Most every new cap I purchase test below marked value. 75% would be 3500uf and still be considered in tolerance.

https://www.mouser.com/ProductDetail/Vishay-Sprague/TVA13182?qs=/ha2pyFaduheRo4h3zOOgLzggc7O5NDsoL3FYe64nFc=

Wow. Guess I never realized just how far off these can be.

 

[Bob]

depending on where you use it, it may not matter:

1. coupling: lowers the f3, allows more bass (or lower frequencies), subject to feedback loop design
2. power supply: adds capacity, energy joules, subject to overdraw of secondary transformer/rectifier (tubes)
3. bypass: depending on where this bypass is. PS: OK, elsewhere -depends on design such as in cathode bias
4. blocking output, generally OK
5. feedback - not likely for this value unless it's an off-the-wall-design

 

[ducati2]

Actually going in a RF generator portion of a sencore sg165 rebuild. The removed cap was even worse, so at least it is better than it was , but still not close to spec.