Author Topic: Cone Excursion  (Read 990 times)

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Offline eddiemac

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Re: Cone Excursion
« Reply #14 on: December 30, 2017, 09:51:09 am »
Thanks. Just one thing: 
Quote
"In this case, the cathode bypass resistor is plenty large enough at 250μF . . ." 
Am I missing something?

Offline Isaac

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Re: Cone Excursion
« Reply #15 on: December 30, 2017, 10:10:30 am »
No, you're not missing anything. I meant to write, "the cathode bypass capacitor."
Isaac

Offline Happy Face

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Re: Cone Excursion
« Reply #16 on: January 05, 2018, 10:51:37 am »
Great thread! So informative.

Offline eddiemac

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Re: Cone Excursion
« Reply #17 on: May 19, 2018, 10:15:29 am »
I replaced the green .0022uF coupling cap with a new Sozo mustard cap of the same listed value.  My Fluke meter reads 3nF on the old cap and 2nF on the new.  I notice an improvement with regard to speaker bass handling now.

Question:  Is that 250uF cathode bypass cap an electrolytic?  It seems to be working fine, but will it need to be replaced some time in the future? 
« Last Edit: June 03, 2018, 11:48:13 pm by eddiemac »

Offline Ryan Phelps

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Re: Cone Excursion
« Reply #18 on: May 20, 2018, 08:09:40 am »
Yes, it's an electrolytic. It's common practice to replace cathode caps when re-capping an amp. Electrolytics have a limited life-span and this cathode cap is pretty inexpensive, so I would replace it.