Ok so as if the Cap on the front side of the board was not bad enough I removed the board and found a (2) 10mfd 450V paper Beaver brand paper cap on the back side.......
Get this they are 20mm in diameter by exactly 30mm in length and when I measured how much larger they could be then that and not interfere with other parts I got roughly 32.5mm yes my machinist rule has 1/2mm increments. I about screamed......It would not be bad had they left some room for error in sizing or latter designs etc.......Unfortunetly in aluminum caps today they tend to make them longer and thinner not fat and short.
I do not not even want to try and figure out what some of those diodes are since they failed to label them all the way around the label side is facing the board......Never seen such stupidity in my life but then again this is 41 years latter so I am sure this was prob. good for it's day.
I can only imagine how spoiled we are today with the huge capacitance we can get in some really small packages and high voltages. If finally settled on on 22uF 450V 105 C caps that are only 1mm longer and are 4 mm smaller in diameter with more the double the capacitance. I could have put some 10uF ones in their but I figured 10uF x 2 is not a lot of filtering and not much head room for an amp that can for short bursts do 400watt'sand does 200watts continuous in (am) mode.
I can not even imagine how bad things must have been 41 years ago in terms of capacitors and other parts. I can not even fathom saying to myself " I think 20uF is more then filtering capacity for a 3 tube amp."!!!LOL If I could have come up with 8mm more room I could have put a 100uF 450V cap in each side of the circuit for 10X more capacitance. That really says a lot about foil etching and modern electrolytes when you can almost get 10X the filtering capacity in a package almost the same size and the 10uF package!!! It truly is amazing. People always want to think about transistor packaging and such as it relates to CPU's and such but I think the ever improving tech for capacitors is really amazing in itself and we take it for granted. I know I sure do until today. I am sure you guys that have been working on old stuff a long time find this amazing too but are used to it.
Imagine what an engineer from 41 years ago would say if he say a 450uF 450V cap that is about just a little bigger then a shot glass?!
Get this they are 20mm in diameter by exactly 30mm in length and when I measured how much larger they could be then that and not interfere with other parts I got roughly 32.5mm yes my machinist rule has 1/2mm increments. I about screamed......It would not be bad had they left some room for error in sizing or latter designs etc.......Unfortunetly in aluminum caps today they tend to make them longer and thinner not fat and short.
I do not not even want to try and figure out what some of those diodes are since they failed to label them all the way around the label side is facing the board......Never seen such stupidity in my life but then again this is 41 years latter so I am sure this was prob. good for it's day.
I can only imagine how spoiled we are today with the huge capacitance we can get in some really small packages and high voltages. If finally settled on on 22uF 450V 105 C caps that are only 1mm longer and are 4 mm smaller in diameter with more the double the capacitance. I could have put some 10uF ones in their but I figured 10uF x 2 is not a lot of filtering and not much head room for an amp that can for short bursts do 400watt'sand does 200watts continuous in (am) mode.
I can not even imagine how bad things must have been 41 years ago in terms of capacitors and other parts. I can not even fathom saying to myself " I think 20uF is more then filtering capacity for a 3 tube amp."!!!LOL If I could have come up with 8mm more room I could have put a 100uF 450V cap in each side of the circuit for 10X more capacitance. That really says a lot about foil etching and modern electrolytes when you can almost get 10X the filtering capacity in a package almost the same size and the 10uF package!!! It truly is amazing. People always want to think about transistor packaging and such as it relates to CPU's and such but I think the ever improving tech for capacitors is really amazing in itself and we take it for granted. I know I sure do until today. I am sure you guys that have been working on old stuff a long time find this amazing too but are used to it.
Imagine what an engineer from 41 years ago would say if he say a 450uF 450V cap that is about just a little bigger then a shot glass?!