Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

5 dot mica color code
#1

I'm currently working on a General Electric L542
http://www.nostalgiaair.org/Resources/160/M0008160.htm

Two capacitors , C14 & C16, are square and have a 5 dot color code. The top row is 3 dots and the bottom row is 2 dots slightly offset so as to fall below the spaces between the dots in the top row. Both look factory installed  but their color code makes no sense to me. It might be an undocumented change in a production run. I would like to decipher these so I can document the values.

Top row colors are; yellow, brown, black; bottom row brown, red. Parts list calls for 330pF.

Any help would be appreciated.

Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.
#2

The 330pf looks right for there location in the set. One problem with the dots over time the colors will fade or shift. If the lighting in your work area is CF or LED can also make it hard to know the true color. Sometimes older eyes have a hard time with certain colors.
#3

Here is a site that gives good information on reading the old rectangular condensers with dots... https://retrovoltage.com/2011/02/16/anti...ode-chart/   From what I can gather your condensers are actually 410 MMF, 100 V, 2%.
#4

Thanks for the replies.

The colors don't look faded like many resistors I've seen, but I certainly agree with David's list of problems. Sadly, the "older" part applies to me. Ah well.

I also think Mike may be correct about the value of these caps. There is one terminal that I will be de-soldering for other work so I will be able to measure one of the caps out of circuit.

Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently no members online.

>