RCA 1861, NTSC and a DEC VR-201 - test-drb@ccmp.vtda.org

30 Sep 1999

ethan said:

...
 Yellow-Purple-Gold-Gold resistor, then tied to ground
via
a Grey-Red-Black-Gold (might be Sky Blue-Red-Black-Gold) and then through one
of the rear pots.  I would spec the values, but I'm not used to such odd
colors
in the significant digits of resistors (just as tolerance bands).  Would a
EE care to translate these?  Might that second one be 92 Ohms?  Could the
first one be 7.5 Ohms? 
Puzzles me too.

   Silver  1e-2
   Gold    1e-1
1  Black   1e0	First 2 digits  give mantissa,
2  Brown   1e1	3rd digit gives exponent,
3  Red	   1e2	4th band gives quality of resistor (if present), else +/- 20%
4  Orange  1e3		(silver = +/- 10%, gold= +/- 5%, red = +/- 2%)
5  Yellow  1e4	5th band (if present) gives reliability (mil-spec, etc.)
6  Green   1e5
7  Blue	   1e6	Example: red-yellow-orange-gold = 2,4,10^3, 5% = 24k Ohm, 5%
8  Violet  1e7
9  Gray		(From Horowitz & Hill, The Art of Electronics, 1st Edition
0  White			pp. 645-646)

No I'm not an EE but with Horowitz and Hill *anyone* can play an EE on TV,
so here's my guess:

Yellow-Purple-Gold-Gold : 5 8 1e-1 5%   = 5.8 +/- 0.29 Ohms
Grey-Red-Black-Gold : Confederate Oil-filled resistor :-) ok, ok....
			9 3 1e0 5% = 93 +/- 4.65 Ohms

Ok, if a *real* EE hasn't already appeared, please do so and set me straight.
						- Mark