wayne
Society Members
Posts: 138
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Resistors
Oct 9, 2021 11:26:08 GMT 12
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Post by wayne on Oct 9, 2021 11:26:08 GMT 12
Hi all, when replacing capacitors is it recommend, worth it checking the value of the resistors as well or replace the caps and see how that works. Learning as I go Thanks Cheers Wayne
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Post by Richard on Oct 9, 2021 12:49:07 GMT 12
I replace resistors if they are out of spec by more than 10% of their stated value
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wayne
Society Members
Posts: 138
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Post by wayne on Oct 25, 2021 21:37:57 GMT 12
Hi all can someone help me with understanding the color code for this resistor please. There are 2 of them on the socket of an EM34 magic eye valve. The schematic says 1.2mg but I can't figure out the color code. Any help much appreciated Cheers Wayne Sorry don't know how to post a picture but the colors are as follows Red brown green and brown.
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Post by Richard on Oct 26, 2021 7:41:37 GMT 12
they are both 1Meg Ohm . See the attached data on the EM34. em34.pdf (172.11 KB)
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peter
Tinkerer
Retired, collector of vintage radios and test equipment for restoration and repair.
Posts: 97
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Post by peter on Oct 30, 2021 21:07:22 GMT 12
Hi all can someone help me with understanding the color code for this resistor please. There are 2 of them on the socket of an EM34 magic eye valve. The schematic says 1.2mg but I can't figure out the color code. Any help much appreciated Cheers Wayne Sorry don't know how to post a picture but the colors are as follows Red brown green and brown. Hi Wayne I assume this is form an older valve radio with older type resistors - the modern resistors have a series of bands starting at one end and the colours give the numbers eg brown, red, orange, yellow etc corresponding to 1,2, 3 and 4. Normally the first two bands give the value of the resistor and the third band gives you the number of zeros (black being nil) so brown = 1 red =2 and 0range =3 zeros so it's 12 thousand ohms (or 12k for short). Older style 1930's resistors had a body colour to give you the first number then a coloured spot to give your the second and a colour at one end to give you the third (going off my memory). So a resistor with a brown body (= 1) a red spot (=2) and a black end would be 1 + 2 and no zeros = 12 ohms. Hope that helps.
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wayne
Society Members
Posts: 138
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Resistors
Oct 31, 2021 13:11:07 GMT 12
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Post by wayne on Oct 31, 2021 13:11:07 GMT 12
Hi Peter, thanks for that I went online and found the color code info I try and check things out before asking everyone but great to have it confirmed. The resistor is from a EM 34 magic eye valve the radio is a Pye PZ71 1953 I can't see a dot any where and the colors are as follows A red band a brown band a green band the rest being half the length of it is the same brown as the 2nd band Thanks again Wayne
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Steve
Society Members
vintageradio.co.nz
Posts: 732
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Post by Steve on Nov 2, 2021 12:52:45 GMT 12
Hi Wayne, are you sure its red brown green brown? The actual body of your old resistor is brown... the bands are normally separated, not up against each other. So could it simply be a Body-End-Dot style, with brown (1) body, red(2) end and dot (or middle) green(5) - thus it could be 1.2M
Cheers, Steve
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