Got an original 555 on the bench, and was getting ready to replace the two small caps on the driver board. I noticed the feedback DC blocker is a 47µf 100V(!) cap. This is in a place where you'd expect to see a 6.3V or 10V cap, not 100V.
Is there a reasoning here that I'm missing?
Is there a reasoning here that I'm missing?
Attachments
Generally odd to tag such a request to a nine month old unrelated thread, but..
There is a pdf posted here:
http://www.diyaudio.com/forums/solid-state/157682-another-high-dc-adcom-gfa-555-a-18.html
...post #176.
There is a pdf posted here:
http://www.diyaudio.com/forums/solid-state/157682-another-high-dc-adcom-gfa-555-a-18.html
...post #176.
Generally odd to tag such a request to a nine month old unrelated thread, but..
There is a pdf posted here:
http://www.diyaudio.com/forums/solid-state/157682-another-high-dc-adcom-gfa-555-a-18.html
...post #176.
Be aware of typos in the print. R3 is 33.2 ohms, not 33.2 K ohms. Q6 is a 2SA1207, not 2SA1270
G²
Be aware of typos in the print. R3 is 33.2 ohms, not 33.2 K ohms. Q6 is a 2SA1207, not 2SA1270
and R11 is 68 ohms.
This appears to be the earlier (my) version.
The 100V rating on the feedback cap is of no consequence.
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