01-19-2015, 10:47 AM
http://www.nostalgiaair.org/PagesByModel...009669.pdf
Arran
The top box content is described in the note on the p.3.
Two wires go in it and they are in good agreement with the sch, one going to the 2,200 Ohm output cathode bias resistor/filament winding centertap and the other is the detector cathode feedback bypass.
The 8uF was certainly not being used as otherwise there would be that extra filter choke that goes to it from the 2uF cap and Field coil connection, but instead the wire-wound big resistor (which we spoke about and which should be 5K ) and 500K detector plate load one both go to that connection of 2uF and field coil.
Given the fact they had so much deviation about the caps I will use 5uF plus 5uF i/o 2uF and 4uF.
I have tons of switch grade 10uF 450V that I use everywhere in series to make high voltage 5uF, so I only need to order one cap, 0.25uF for tone ctl, and this one has to be 630V. I have already build a kit in Mouser, today will add few things and order (I am out of popular values in film caps and resistors).
Arran
The top box content is described in the note on the p.3.
Two wires go in it and they are in good agreement with the sch, one going to the 2,200 Ohm output cathode bias resistor/filament winding centertap and the other is the detector cathode feedback bypass.
The 8uF was certainly not being used as otherwise there would be that extra filter choke that goes to it from the 2uF cap and Field coil connection, but instead the wire-wound big resistor (which we spoke about and which should be 5K ) and 500K detector plate load one both go to that connection of 2uF and field coil.
Given the fact they had so much deviation about the caps I will use 5uF plus 5uF i/o 2uF and 4uF.
I have tons of switch grade 10uF 450V that I use everywhere in series to make high voltage 5uF, so I only need to order one cap, 0.25uF for tone ctl, and this one has to be 630V. I have already build a kit in Mouser, today will add few things and order (I am out of popular values in film caps and resistors).
