12-31-2014, 08:03 AM
Hi again. This is an edit to a previous response I had about the filament not having continuity. Well it does; I pulled the cap off the rectifier and jiggled the socket and got ohms! So a little remedial soldering is in order.
MOVING ON to other things, my next question has to do with candohms and one particular resistor that appears to have been swapped out.
On the schematic, resistor 82 is listed as a 5K wirewound. On the chassis, it's a candohm-style resistor bolted to the chassis. it runs between the field coil and the 3mfd electroytic to ground. Looking last night, I noticed that the field coil side of the resistor was disconnected. ?? Ohmed it out and it read many megs. OPEN. So I looked around and the only other likely replacement resistor I could find was an aftermarket Ohmite 15K, 10W tied in on one end to the middle lug on bakelite capacitor number 58. The other end goes to ground. That middle is used as a tie in post to the field coil, so I'm thinking this resistor is a replacement and whoever put it in just found that to be a convenient spot to tie it in.
But it's a 15K! Three times what's called for on the schematic. Obviously I'm going to replace it with a five. But how many watts should I use?
Similar question for the five section candohm (part 82). Several sections are quite high so I'm going to replace it. But I don't know what wattages to use, and space is at a premium. Anyone have any idea what wattages I should use for each section? Thank you!
http://www.nostalgiaair.org/Resources/222/M0013222.htm
[/quote]
MOVING ON to other things, my next question has to do with candohms and one particular resistor that appears to have been swapped out.
On the schematic, resistor 82 is listed as a 5K wirewound. On the chassis, it's a candohm-style resistor bolted to the chassis. it runs between the field coil and the 3mfd electroytic to ground. Looking last night, I noticed that the field coil side of the resistor was disconnected. ?? Ohmed it out and it read many megs. OPEN. So I looked around and the only other likely replacement resistor I could find was an aftermarket Ohmite 15K, 10W tied in on one end to the middle lug on bakelite capacitor number 58. The other end goes to ground. That middle is used as a tie in post to the field coil, so I'm thinking this resistor is a replacement and whoever put it in just found that to be a convenient spot to tie it in.
But it's a 15K! Three times what's called for on the schematic. Obviously I'm going to replace it with a five. But how many watts should I use?
Similar question for the five section candohm (part 82). Several sections are quite high so I'm going to replace it. But I don't know what wattages to use, and space is at a premium. Anyone have any idea what wattages I should use for each section? Thank you!
http://www.nostalgiaair.org/Resources/222/M0013222.htm
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