Re: ss recto bleed resistor?
- From: RS <RS@xxxxxxxxxx>
- Date: Wed, 28 Jan 2009 13:48:16 -0500
On Mon, 26 Jan 2009 09:18:18 -0500, "Phil S." <psymonds@xxxxxxxxxxx>
wrote:
Thanks. I am going to omit the bleed R. If it appears to be needed, it's
easy to add one, but things are already cramped enough.
Phil, Your layout doesn't look that cramped.
The B+ will discharge pretty fast -IF- your power tubes are connected
and warmed up. Normally true, but that will not be the case if you
just flick the power switch briefly, or if you don't throw the standby
switch. In those cases, the supply (or first stage of the
electrolytic, in the case of the standby) can stay charged for quite a
while.
You'll also see paralleled resistors in amps that use two
electrolytics in series as the first cap in the supply. The two caps
are used to attain higher voltage handling. Some Fenders do that.
That requires two 'bleeder' resistors in parallel with the caps, to
function as a divider. Makes sure that B+ is distributed 50-50 across
the caps. Not the case here, but maybe good to know.
Many techs and engineers install a permanent bleed resistor in amps
that will be on the bench for a while. Saves having to connect and
reconnect drain resistors. And saves you the jolt when you forget to
do that.
.
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