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adibrook · 29th Jun 2006, 1:10 pm

oooh..riight.

So it's like a normal ht circuit..but up side down...the smoothing choke is on the -ive rail. Wierd. But i guess that makes sence.

Ok... now i'v got that figured out...i need to do somethgin about the caps.

So far i can see several ways of dealing with the cap situation.

The caps are in a block of tar under the main circuit (which holds resistors).

I can tag every wire with masking tape and a number, and desolder them from the resistor holder. Then drill out the rivits on the resistor holder and take it off. Then remove all the caps from the tar block (and maybe rip out all the tar?) and install new caps underneath the resistor holder.

BUT...i'm wandering if i can do it another way. Modern caps are tiny compared to 30's caps. maybe i can just leave the circuit...and the tar block...in place, and just cut all the connections to the tar block. And just add modern capacitors to the circuit?

any ideas?

BTW...how did they manage with so little smoothing?

29th Jun 2006, 1:10 pm	#7
adibrook Retired Dormant Member Join Date: Dec 2004 Location: Weymouth, Dorset, UK. Posts: 377	Re: marconi 264 caps and PSU oooh..riight. So it's like a normal ht circuit..but up side down...the smoothing choke is on the -ive rail. Wierd. But i guess that makes sence. Ok... now i'v got that figured out...i need to do somethgin about the caps. So far i can see several ways of dealing with the cap situation. The caps are in a block of tar under the main circuit (which holds resistors). I can tag every wire with masking tape and a number, and desolder them from the resistor holder. Then drill out the rivits on the resistor holder and take it off. Then remove all the caps from the tar block (and maybe rip out all the tar?) and install new caps underneath the resistor holder. BUT...i'm wandering if i can do it another way. Modern caps are tiny compared to 30's caps. maybe i can just leave the circuit...and the tar block...in place, and just cut all the connections to the tar block. And just add modern capacitors to the circuit? any ideas? BTW...how did they manage with so little smoothing?