Dumble-ator bleeder resistor

General discussion area for tube amps.

Moderators: pompeiisneaks, Colossal

Post Reply
surfsup
Posts: 1513
Joined: Mon Nov 29, 2010 12:21 am
Location: Chicagoland

Dumble-ator bleeder resistor

Post by surfsup »

I noticed there is no bleeder resistor on this circuit. Is there any particular reason why?

I am going to install a 220k. I am using four rail caps for a total of 160u. In figuring the time constant for this, do I use the full 160u or just each 33u or 47u cap?
tubeswell
Posts: 2337
Joined: Thu Mar 27, 2008 6:42 am
Location: Wellington. NZ

Re: Dumble-ator bleeder resistor

Post by tubeswell »

1 x 220k 2W on the reservoir cap only will be fine for draining everything quickly.
He who dies with the most tubes... wins
User avatar
Structo
Posts: 15446
Joined: Wed Oct 17, 2007 1:01 am
Location: Oregon

Re: Dumble-ator bleeder resistor

Post by Structo »

It depends,

Surfsup,
Are you using the 135v PT, with the voltage doubler rectifier?
Tom

Don't let that smoke out!
surfsup
Posts: 1513
Joined: Mon Nov 29, 2010 12:21 am
Location: Chicagoland

Re: Dumble-ator bleeder resistor

Post by surfsup »

I'm using the allyn tp2x tranny, if i recall the item number correctly. I looked in my stash and have a 330k 2w. I have two 47u caps first, instead of one like on the schemo. So i have an extra layer of filtering, then the two 33u. I am going to tie the first two 47u negatives together to ground. It goes:

47u/1k5/47u/2k7/33u/100k/33u

I plan to hang the 330k off the 47u/2k7 junction.
tubeswell
Posts: 2337
Joined: Thu Mar 27, 2008 6:42 am
Location: Wellington. NZ

Re: Dumble-ator bleeder resistor

Post by tubeswell »

It will still work if you put it with one of the other filter caps
He who dies with the most tubes... wins
surfsup
Posts: 1513
Joined: Mon Nov 29, 2010 12:21 am
Location: Chicagoland

Re: Dumble-ator bleeder resistor

Post by surfsup »

Yea, that's where it fits on my board though...the last two will discharge through the 2k7...
Post Reply