Help with bogen CH8

imix500 · 24th April 2006, 04:07 AM

Hello all, I'm rebuilding this old amp for a friend. I'm working on getting a schematic, but in the mean time I'm replacing all the caps and will begin testing all resistors.
I have a few parts I need help identifying. The first is certainly a ceramic power resistor, but I don't know how to read it's markings. The second is, well, the picture speaks for it's self.
The only other parts I'm not sure of are two large resistors but I don't know how to judge the power rating by thier size. One is about 1.25" x 1/4" and the other is 1.5" x 5/16". The first one is pictured.
It's bands are Yel,Vil,Orn (I think)
The other is Red,Vil,Brn (I think) But it reads 450 ohms.
As far as the bulk of the resistors, is 1/2w adequate for replacement of the smaller carbon ones?
Yes indeed, a schematic would be nice.
Thanks!

imix500 · 24th April 2006, 04:09 AM

...

imix500 · 24th April 2006, 04:10 AM

?

imix500 · 24th April 2006, 04:11 AM

One of the larger carbon resistors

imix500 · 26th April 2006, 03:10 AM

Ok, any help on the mystery parts in the photos?
Thanks.

tomtt · 27th April 2006, 03:32 AM

post 3 is a molded mica cap

under 'mica capacitors'-just past half way

http://www.electronicsgenius.com/Tec...capacitors.HTM
`````````````````````````````````````````

resistor codes-

http://www.elexp.com/t_resist.htm

imix500 · 28th April 2006, 03:49 AM

tomtt, thanks for the link. So if I'm reading it right it's a 500pf cap? The values of the resistors I can figure in my head, the colors are just really worn.
My question was towards the power rating of the resistors based on thier size. Any ideas? Thanks.

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26th April 2006, 03:10 AM	#5
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	Ok, any help on the mystery parts in the photos? Thanks.

27th April 2006, 03:32 AM	#6
tomtt diyAudio Member Join Date: Aug 2002 Location: kansas city mo, and on occasion, around the world ... Blog Entries: 15	post 3 is a molded mica cap under 'mica capacitors'-just past half way http://www.electronicsgenius.com/Tec...capacitors.HTM ````````````````````````````````````````` resistor codes- http://www.elexp.com/t_resist.htm

28th April 2006, 03:49 AM	#7
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	tomtt, thanks for the link. So if I'm reading it right it's a 500pf cap? The values of the resistors I can figure in my head, the colors are just really worn. My question was towards the power rating of the resistors based on thier size. Any ideas? Thanks.

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