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

Thread Closed
Thread Rating:
  • 1 Vote(s) - 3 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM
Philco 610B oscillator wiring
Thanks David! I do have that same later prodution model 610 schematic. I've also studied the Philco service bulletins fo...Tubester — 08:12 PM
Philco 610B oscillator wiring
Some info from Beitmans says late production. David   David — 06:06 PM

[-]
Who's Online
There are currently 1937 online users. [Complete List]
» 2 Member(s) | 1935 Guest(s)
AvatarAvatar

>