Re: R1155 power supply unit
As far as I know there is no "correct" power supply for the R1155 apart from the original ground supply for the 1154/1155 set up.
The main option is to make you own as most amateurs have done from what they had to hand.
As this set was used to test the TR 1196 I guess the guys in the workshop would have used what they had to hand. The spec of this psu is 230V at 70ma which is about right for the 1155 the odd 10V won't make much difference in my opinion.
The input of this psu is stated as 200 to 260V so there may be tappings that allow the voltage to be varied a bit. As it has a valve rectifier and a choke the voltage could easily drop down to about 230V under load.
I've seen the picture on the Mullard Magic site but there doesn't seem to be a circuit anywhere.
I wonder what arraangement was made fior the audio in this case.
Don m5aky
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