Shared/Split Cathode Switch

Billy Batz · Post by **Billy Batz** » Tue Feb 22, 2005 5:38 pm

I want my very own Darkness Video in my living room.

Dax-The-Ax · Post by **Dax-The-Ax** » Tue Feb 22, 2005 6:12 pm

I updated my diagram, it doesn't look right!!!

ricks57custom · Post by **ricks57custom** » Tue Feb 22, 2005 6:17 pm

Dax,
I just edited this post to avoid anymore confusion. Try that bad boy out!

Guest · Post by **Guest** » Tue Feb 22, 2005 6:22 pm

yeah, i'm confused, i thought my common was on pin 3. I'm schematic challenged.

ricks57custom · Post by **ricks57custom** » Tue Feb 22, 2005 6:23 pm

Shit!
Dax, you had it right. It should work that way! I know it seems confusing when you look at it.

Sorry about that,
Rick

Billy Batz · Post by **Billy Batz** » Tue Feb 22, 2005 6:31 pm

That looks right to me!!!!!!

One side of the switch and the 2 cathodes are jumped. The other side and theyre each going to theyre own RkCk set. The schem doesnt designate which side the bright is on. Here the brite would obviously be on V1b. But unless Im completely and uterly mistaken this is correct.

Flames1950 · Post by **Flames1950** » Tue Feb 22, 2005 7:22 pm

Looks fine, get it hooked up and play!!

Billy Batz · Post by **Billy Batz** » Tue Feb 22, 2005 7:41 pm

Mines been hooked up. I play. I likes.

Guest · Post by **Guest** » Tue Feb 22, 2005 8:03 pm

Me's too.

Guest · Post by **Guest** » Tue Feb 22, 2005 8:07 pm

Are Pins 3 and 8 jumpered? i just don't see how it would run with both sides (Split Cathode).

Guest · Post by **Guest** » Tue Feb 22, 2005 8:26 pm

Epiphany!!!! I see it now, holy shit that took a while!!!! When on pole A, it's Split Cathode because Pin 3 is already hooked up but not through the switch. On Pole B, Pins 8 & 3 are both going to the 320uf/820ohm stack (Shared Cathode)!!

I'm a Dork!!!!

Dax · Post by **Dax** » Tue Feb 22, 2005 8:26 pm

That was me wasting bandwidth.

Dax-The-Ax · Post by **Dax-The-Ax** » Tue Feb 22, 2005 9:13 pm

Ok, now what about in a 2203, does the Split/Shared concept work the same??

Flames1950 · Post by **Flames1950** » Tue Feb 22, 2005 11:53 pm

I suppose you could switch the second gain stage to share the 2.7K/.68uF combo for somewhat less gain on the high input and yet more on the low input. The question may be whether the .68uF cap is appropriately tuned for the two stages, or will it be too obnoxious and bright?