U47n Parts

[sr1200]

I have a question about 2 parts on the U47n schematic. (see attached)
First is what looks to be a 100mH to the left of the tube (see attached)  is it 100mH or something else (very hard to read this schematic that i have)  its below a 6.8pF(?) capacitor that has no designation either.
Second the "S1" impedance switch.  The connections at the top of the switch are confusing me a bit. I cant really tell if where things are connected on the top of the swich.  Also what would the designation be for this switch as in DPDT DP4T?

 

[gyraf]

it's probably a 100uH grid-stop inductor, to prevent HF from messing up nuvistor

Impedance switching is done by re-wiring, not by a switch. Drawn is an overview of the internal solder post arrangement.

Jakob E.

 

[moamps]

Hi,
here is a redrawn schematic from here
http://www.filmsoundsweden.se/backspegel/neumann-u47.html
The inductor in question is 100uH, as Jakob said. Some schematics on the net do not include that inductor.
S1 is used just for setting secondaries in series or parallel.
Regards