Topband: Phase-Current monitor.

[Bruce]

I have an old tube type AM Broadcast Band current and phase monitor, Nems-Clarke 108E.  It has been great for setting up my phased vertical array.  

Now the 180 degree scale has gone out of calibration. Wonder if anyone has a manual or data for this beautiful old antique?  If I could even get a diagram it would be a lot of help.  

Thank you in advance for any help.

73
Bruce-K1FZ