03-05-2017, 07:53 PM
Hi Bill,
>I just got done removing the old filters caps the easy way explained and shown by Morsz on another thread.
I'm not sure which caps you are referring to. The filter caps on your model 81 are listed on the schematic as #37 and 38. These are electrolytic caps which are polarized (have a + and - connections). If you noticed that there isn't a value assigned to them because this schematic is form Canada where at the time they used 25cy ac current. In the states we use 60cy ac. There is a difference in the value between the two. You want to replace these with 10mfd (ufd) @ 450vdc.
The caps inside the black bakelite shells under the chassis are not called filter cap as they are used for a bunch of different applications.
So the caps in the bakelite shells that you need to replace are: #15 listed as two .09mfd. Nowdays this is a non standard value so they get replaced with two .1mfd
#24 which are a .001mfd and a .015mfd. These are still standard values.
#28 a .006mfd again standard part.
And #35 a pair of .015mfd. Some would use a XY cap for the one by the ac switch. To me I don't know that it matters much. All of these caps should be rated @ 630v and are mylar or film caps. These are not polarized no + or -.
Some of us order in quinity as we use them up pretty quick. You can get a little price break. Just to keep thing simple I may want to just order your caps and resistor from Radiodazes. There are afew guys that just sell caps but if you need other things...
OBTW you probably continue to post on your original thread rather than tagging on someone else s. I can be a little confusing as to which topic is being discussed. Moderators may move it, it's not a big deal.
>I just got done removing the old filters caps the easy way explained and shown by Morsz on another thread.
I'm not sure which caps you are referring to. The filter caps on your model 81 are listed on the schematic as #37 and 38. These are electrolytic caps which are polarized (have a + and - connections). If you noticed that there isn't a value assigned to them because this schematic is form Canada where at the time they used 25cy ac current. In the states we use 60cy ac. There is a difference in the value between the two. You want to replace these with 10mfd (ufd) @ 450vdc.
The caps inside the black bakelite shells under the chassis are not called filter cap as they are used for a bunch of different applications.
So the caps in the bakelite shells that you need to replace are: #15 listed as two .09mfd. Nowdays this is a non standard value so they get replaced with two .1mfd
#24 which are a .001mfd and a .015mfd. These are still standard values.
#28 a .006mfd again standard part.
And #35 a pair of .015mfd. Some would use a XY cap for the one by the ac switch. To me I don't know that it matters much. All of these caps should be rated @ 630v and are mylar or film caps. These are not polarized no + or -.
Some of us order in quinity as we use them up pretty quick. You can get a little price break. Just to keep thing simple I may want to just order your caps and resistor from Radiodazes. There are afew guys that just sell caps but if you need other things...
OBTW you probably continue to post on your original thread rather than tagging on someone else s. I can be a little confusing as to which topic is being discussed. Moderators may move it, it's not a big deal.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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