Whilst awaiting parts for my Pye I decided to make a start on replacing the capacitors and resistors in my Little Maestro. I knew that the area around V3 was going to be the most fiddly so I was leaving that to last, getting some practice and confidence as I worked towards it.
I was enjoying myself and had started to wonder how on earth PCBs ever caught on.
When I got to a resistor that was connected to V3 I was confused as it was a different value to that shown on the ERT Service Chart (number 1091) which I'd bought. The more I looked the more confused I became as several resistors seemed different as were the connections.
There were no signs of The Phantom as the joints still had anti-tamper paint on them.
This seemed to indicate that either the resistors had discoloured in some very odd ways AND the valve's pins weren't numbered sequentially or the data was wrong. Eventually I spotted that the sheet says this valve is a UCL82 when it is in fact a UCL83 and this number is stamped on the chassis.
I should be able to manage without but I'd be interested if anybody has got a correct circuit diagram and I'm also curious to know how common this sort of thing is.
Work has now stopped on that one too as I'd bought the bits on the data sheet rather than what are actually in the set. Luckily there's nothing exotic.
Oh well, it's all good clean fun.
-Joe
I was enjoying myself and had started to wonder how on earth PCBs ever caught on.
When I got to a resistor that was connected to V3 I was confused as it was a different value to that shown on the ERT Service Chart (number 1091) which I'd bought. The more I looked the more confused I became as several resistors seemed different as were the connections.
There were no signs of The Phantom as the joints still had anti-tamper paint on them.
This seemed to indicate that either the resistors had discoloured in some very odd ways AND the valve's pins weren't numbered sequentially or the data was wrong. Eventually I spotted that the sheet says this valve is a UCL82 when it is in fact a UCL83 and this number is stamped on the chassis.
I should be able to manage without but I'd be interested if anybody has got a correct circuit diagram and I'm also curious to know how common this sort of thing is.
Work has now stopped on that one too as I'd bought the bits on the data sheet rather than what are actually in the set. Luckily there's nothing exotic.
Oh well, it's all good clean fun.
-Joe
