Shared cathode on V1
.022 coupling caps after first stage
270k mixer resistors
Bright cap on volume pot, value unknown
No mixer bypass cap
No bypass cap on V2a cathode
56k/250pf tone stack combo, typical JTM45 setup
27K NFB resistor on 16ohm tap
.1 output coupling caps after phase inverter
220k bias splitter resistors
.1 cap on the presence control
All transformers are Drake
Aluminum end block chassis
Amplifier appears to be a late 65, early 66