Good and bad news..
I found my capacitance meter and measured the button and it's about 1500 pf.
The bad news is in my posting I transposed red and green and the correct
color sequence is: black, brown, green, red, gold, gray..
Black desigantes military, and 1500 pf by the next 3 but I still need to
know what the gold and gray designate..
Tolerance, temp coeff, and voltage but which 2 are designated and how?. Any
tips appreciated. A spec on this cplr would be appreciated.
tnx
hank wd5jfr
"Henry Kolesnik" wrote in message
...
I just got a TMC Directional Coupler Unit Model CU 2/50 and wonder if
anyone
would have specs or a schematic? Inside it has a 0.6 ohm 40 watt
resistor
inline with input and ouput. Off each end of this resistor it has a
silver
button mica capacitor. My "cheatsheet" for silver button micas is not to
be
found. I wonder if someone can tell me the capacitance of a silver
button
mica that has the following six colors: black, brown, red, green, gold,
grey.

tnx & 73
hank wd5jfr

Henry,

I couldn't find all of the info in any one Table. But I think (according to
Reference Data For Radio Engineers)

Black - For MIL type D or X, the temperature coefficient is +/- 100. I think
that means all MIL.

Gold means 5%

Gray probably means 800V.

Tam/WB2TT
"Henry Kolesnik" wrote in message
...
Good and bad news..
I found my capacitance meter and measured the button and it's about 1500
pf.
The bad news is in my posting I transposed red and green and the correct
color sequence is: black, brown, green, red, gold, gray..
Black desigantes military, and 1500 pf by the next 3 but I still need to
know what the gold and gray designate..
Tolerance, temp coeff, and voltage but which 2 are designated and how?.
Any
tips appreciated. A spec on this cplr would be appreciated.
tnx
hank wd5jfr
"Henry Kolesnik" wrote in message
...
I just got a TMC Directional Coupler Unit Model CU 2/50 and wonder if
anyone
would have specs or a schematic? Inside it has a 0.6 ohm 40 watt
resistor
inline with input and ouput. Off each end of this resistor it has a
silver
button mica capacitor. My "cheatsheet" for silver button micas is not
to
be
found. I wonder if someone can tell me the capacitance of a silver
button
mica that has the following six colors: black, brown, red, green, gold,
grey.

tnx & 73
hank wd5jfr

On Thu, 6 Nov 2003 16:32:33 -0500, "Tarmo Tammaru"
wrote:
Gray probably means 800V.

Mil-Spec has no specification at 800V, gray is for characteristic.
Voltage is not available with so few markings. Mil-Spec voltage spans
from 100V to 2000V through 9 grades.

73's
Richard Clark, KB7QHC

Henry Kolesnik wrote:

Good and bad news..
I found my capacitance meter and measured the button and it's about 1500 pf.
The bad news is in my posting I transposed red and green and the correct
color sequence is: black, brown, green, red, gold, gray..
Black desigantes military, and 1500 pf by the next 3 but I still need to
know what the gold and gray designate..

SNIP

The standard code is ...
Black = 0
Brown = 1
Red = 2
Orange = 3
Yellow = 4
Green = 5
Blue = 6
Violet = 7
Grey = 8
White = 9
Gold = 5%
Silver = 10%

First color = 1st significant digit
Second color = 2nd significant digit
Third Color = decimal multiplier
Fourth Color = Tolerance
Fifth Color = Temperature Coefficient

Additionally, for mica capacitors the colors have position dependent
significance. For a Military mica capacitor the position sub-code is as
follows:

First dot = Black = designation as JAN Mica
Second dot = Brown = first significant digit = 1
Third dot = Green = second significant digit = 5
Second line, first dot = Red = multiplier = 100
Second line, second dot = Gold = 5%
Second line, second dot = Grey = voltage rating = 800 [8 = grey] volts DC.


All of above is as I recall from many, many years ago. [I stopped
detailed military design 25 years ago ...] Someone may have more info or
better recollection.

For a spec I'd look into the EIA specs or JAN-MIL-C series.

Good Luck & God Bless

Deacon Dave, W1MCE

Tolerance, temp coeff, and voltage but which 2 are designated and how?. Any
tips appreciated. A spec on this cplr would be appreciated.
tnx
hank wd5jfr
"Henry Kolesnik" wrote in message
...