Radiola 60 and 18 bypass condenser values

2/15/2010 2:25:31 PMMike S

Hello.

I am working on two Radiolas. One model 60 and one model 18. I have been searching the internet for days trying to determine what the proper values of all the small bypass condensers should be. In both sets they seem to be several strips of metal separated by paper and then encased in a small metal covering. There is usually a single letter such as "Z" or "B" on the metal cover. The schematics do not identify the values of these capacitors. I would like to replace all of them. I have already replaced the paper capacitors in the power supplies and the radio with polyester tubulars. FYI a couple hours in the oven at 200 and the capacitor/coil can is easy to get the guts out.

Anyway does anyone have a schematic that lists all the missing condenser values for these sets? Resistor values would be good to have as well.

Thanks!

Mike

2/15/2010 3:49:02 PMNorm Leal

Mike

Values aren't called out on my schematics but these caps are usually good. Detector grid coupling will be around 250 pf. Others will also be in this area.

http://www.nostalgiaair.org/References/Articles/Singles/Radiola18-2.htm

Bypass caps are usually from a B+ line to B-. Value of these can be .1 to 1 mf. Value isn't critical and these are often leaky.

Norm

:Hello.
:
:I am working on two Radiolas. One model 60 and one model 18. I have been searching the internet for days trying to determine what the proper values of all the small bypass condensers should be. In both sets they seem to be several strips of metal separated by paper and then encased in a small metal covering. There is usually a single letter such as "Z" or "B" on the metal cover. The schematics do not identify the values of these capacitors. I would like to replace all of them. I have already replaced the paper capacitors in the power supplies and the radio with polyester tubulars. FYI a couple hours in the oven at 200 and the capacitor/coil can is easy to get the guts out.
:
:Anyway does anyone have a schematic that lists all the missing condenser values for these sets? Resistor values would be good to have as well.
:
:Thanks!
:
:Mike
: