YVM-1 choke placement question.

[thehoj]

I'm working on a '71 Traynor YVM-1 and replacing all of the electrolytics.
Also, the schematic that I found for the amp online (http://www.lynx.bc.ca/~jc/yvm-1.jpg) shows a choke in the power supply section.
Except my power supply looks like this one http://www.lynx.bc.ca/~jc/yvm-1powersupplymod.jpg and I'd like to get a choke in there. So I ordered a 5H Hammond (193H) choke.

I'm thinking I'd like to leave the power supply in its current config. Would this be the best way to implement the choke?
http://vwtweaked.ca/images/yvm-1powe...ymodwchoke.jpg

[Bruce / Mission Amps]

I'm working on a '71 Traynor YVM-1 and replacing all of the electrolytics.
Also, the schematic that I found for the amp online (http://www.lynx.bc.ca/~jc/yvm-1.jpg) shows a choke in the power supply section.
Except my power supply looks like this one http://www.lynx.bc.ca/~jc/yvm-1powersupplymod.jpg and I'd like to get a choke in there. So I ordered a 5H Hammond (193H) choke.

I'm thinking I'd like to leave the power supply in its current config. Would this be the best way to implement the choke?
http://vwtweaked.ca/images/yvm-1powe...ymodwchoke.jpg

Kind of No... replace the 10 watt 470 ohm resistor from the FWB, (the resistor in between the two 40uF caps) with a 5Hy to 10Hy 100ma choke.
Since it has run fine for years with out the choke feeding the preamp stages I think you'll find this method will work well too.

[thehoj]

Kind of No... replace the 10 watt 470 ohm resistor from the FWB, (the resistor in between the two 40uF caps) with a 5Hy to 10Hy 100ma choke.
Since it has run fine for years with out the choke feeding the preamp stages I think you'll find this method will work well too.

It has definitely run fine for years, but I would like to remove as much ripple as possible from B+ feeding the preamp stages as well. I'm rewiring the preamp section very similarly to a 2204 jcm800. It has a choke prior to that second filter cap and then all the rest of the filter caps as well.

If I wanted to have the choke like that would this make more sense?
http://vwtweaked.ca/images/yvm-1powe...wchokerev2.jpg

[Bruce / Mission Amps]

It has definitely run fine for years, but I would like to remove as much ripple as possible from B+ feeding the preamp stages as well. I'm rewiring the preamp section very similarly to a 2204 jcm800. It has a choke prior to that second filter cap and then all the rest of the filter caps as well.

If I wanted to have the choke like that would this make more sense?
http://vwtweaked.ca/images/yvm-1powe...wchokerev2.jpg

I don't see anything wrong with that supply rail either.... looks totally reasonable.
Keep in mind though that +90% of the PT/rectifier current will be flowing through the power tubes, not the preamp.
And, the preamp stages all run in Class A at a very constant current, (variable DC current, up and down due to loads changes etc, is the definition of AC) so it doesn't take but just a few uF capacitance per stage to filter the ripple out of the B+ rail to the preamp stages.
Most modern amps are probably over filtered at the preamp side of the B+ rail and under filtered at the power tube side.

[thehoj]

I don't see anything wrong with that supply rail either.... looks totally reasonable.
Keep in mind though that +90% of the PT/rectifier current will be flowing through the power tubes, not the preamp.
And, the preamp stages all run in Class A at a very constant current, (variable DC current, up and down due to loads changes etc, is the definition of AC) so it doesn't take but just a few uF capacitance per stage to filter the ripple out of the B+ rail to the preamp stages.
Most modern amps are probably over filtered at the preamp side of the B+ rail and under filtered at the power tube side.

Interesting. Basically I'm trying to accomplish a tighter sound than I would have without the choke.
In your opinion is there any downside to having the choke filter for the power and preamp sections? Is the "over" filtering in the preamp section going to hinder the sound in any way?