(inter-)stage coupling : recommended reading?

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ChopSauce
Posts: 1038
Joined: Wed Mar 15, 2017 12:08 pm
Location: So Paris, France

Re: (inter-)stage coupling : recommended reading?

Post by ChopSauce »

pompeiisneaks wrote: Fri Sep 22, 2017 10:32 pm
roberto wrote: Fri Sep 22, 2017 9:04 pm C'est vraiment trés jolie!
Le schéma c'est le même que tu utilise maintenant?

Nice amp! Is that schematic the actual one?
Quoi? Vous êtes en Italie, mais vous parlez français? :D Je suis confondu! :)
That remains me holidays in Italy with my parents, as a teen. Anyone could understand us despite we were talking some franco-spanish mix with a few sparse italian words, for good measure.

EDIT: I posted it here http://ampgarage.com/forum/viewtopic.php?f=10&p=377891
Malcolm Irving wrote: Thu Sep 21, 2017 3:08 pm A leaking coupling cap onto the grid of the EL84 can do that. It puts a positive DC on the grid which overcomes the
bias. You can check the DC voltage at the EL84 grid - it should be close to zero. Anything approaching, or above, 1 Volt
could indicate too much DC leaking through the associated coupling cap.
I finally checked that but couldn't find any trouble there :|
(plus the amp has now been running trouble free for hours.)
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