[NJARC] Specs for Silver-Marshall Model 221 Audio Output Transformer:

[Yardleyite at aol.com]

Hello All,
            Would  anyone have the specs for a Silver Marshall model 221 
audio output transformer?  It appears to be "single ended" and I'd like to know 
what tube(s) I can use it  with, output impeadance, etc etc.
 
Any information will be greatfully appreciated!
                                                                Best  Regards,
                                                                              
      Joe  Cro N3IBX