125C1A Choke

[TIMBO]

Hi guys, Got one of these and trying to decide whether to use it or not but first, its rated @ 90mAs and can be used for Bassmans but the build I am doing is basically the same as a bassman but with three more preamp tubes. I'm thinking that having a choke can only help with this build but is this choke rated high enough for the extra preamp tubes or is there more math to it.

I have put a socket in for a rect tube but at this stage I will use a SS plug and my thoughts were not to use a choke and put in a resistor to give a bit of SAG. Thoughts  Thanks

[tubeswell]

Yeah that'll be fine. Each pre-amp tube stage draws about 2mA max from the HT supply if its a 12AX7, a little more for a 12AT7

[TIMBO]

Thanks tubeswell, While we are on the subject, I noticed that in the Hywatts they have a choke/resistor combo, is this to simulate  SAG when using a SS rect????

[TIMBO]

This is what I am working on. I have a socket for a rect tube but the only rect tube I have on hand is a 5U4GB and as my PT is already a bit under powered (300-0-300) would be better if it was 325-0-325 at the moment a SS rect will lift the juice a bit. A GZ34 would be better for a bit of sag. This i'll will try later in the build to see what it will do. So i'll try the 100r/5w resistor after the choke as Hywatt does. Thanks

[tubeswell]

Thanks tubeswell, While we are on the subject, I noticed that in the Hywatts they have a choke/resistor combo, is this to simulate  SAG when using a SS rect????

Which Hywatt schematic are you referring to?  http://hiwatt.org/tech2.html

[TIMBO]

  Hi tubeswell,  Looking at the Hywatt schems and  . I did a build of the Jimmy Page and used M Huss's schems and now that I have had another look there is NO choke in the PSU  so I've got no idea where I got that from  so i'll just put the choke in and be done with it. Thanks

[kagliostro]

I noticed that in the Hywatts they have a choke/resistor combo, is this to simulate  SAG when using a SS rect????

May be you remembered this schematics ?

K