I have just got a new to me Dynaco ST-70 Series 2, and are about to start work on it.
I have already got replacement Elec Caps, so that will be the first job when time allows.
The chassis is a little battered & bruised in places so I will probably remove the transformers to allow a little panel beating to be carried out safely.
So now the request for help
The original bias resistors fitted are 15ohm, not 15.6ohm as stated on the circuit.
If I replace these with some 10ohm 2 watt (that I have in my bits box), would the bias circuit still work with the hi-lo leds and give a lower bias current ??
I am also thinking of doing the Triode mod, and putting the switches on the front in place of the input rca's.
And also removing the unused 16ohm speaker connectors, and putting new insulated input sockets on the rear. (I don't like uninsulated sockets grounded to the chassis on the front)
What else should I replace or check?
Last edited by offanonone on Tue Jul 29, 2014 9:37 am; edited 1 time in total (Reason for editing : Corrected some of my bad spelling!!)