Miles

I assume that your second remark concerns my statement about soldering CC resistors. AFAIK, the tightest tolerance for CC resistors is 5%. You can select a tighter tolerance value from this 5% group but do not expect the resistor to remain at this absolute value over time, temperature or humidity.

The resistance might return to a value within it's marked 5% tolerance but it is doubtful that it will return to it's selected value after any type of stress. It would be interesting to measure a CC resistor using an 8 1/2 digit ohmmeter to see what changes in value happen over relatively short excursions in time, temperature or humidity.

Regards,

Jim

Logic: Method used to arrive at the wrong conclusion, with confidence. Murphy

On Wednesday, July 30, 2025 at 01:42:25 PM CDT, [email protected] <[email protected]> wrote:

No criticism, but a couple of thoughts:

First, I very much doubt that the original resistors were carbon composition. Unless the values were extremely high, they were probably wire wound.

Second, you can solder a resistor – or other component – without altering its value by gripping the lead with a hemostat next to the body of the part.

Miles B. Anderson, K2CBY
16 Round Pond Lane
Sag Harbor, New York 11963-3821
Phone: (631) 725-4400
FAX: (631) 725-2223

e-mail: [email protected]

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html