09-10-2019, 10:07 AM
Thanks Terry
Dad told me that when he was first interested in electronics and was building something that required say 2% components, he would (in ignorance) try to select values from a batch wider tolerance types, apart from other problems, he found that the values of 20% resistors for instance would be within 20% but outside 10%, he says probably because they were selected from production runs as 5%, 10%, 20%.
I believe that he referred to the resistors Terry described. I have some of dads stock of those ceramic bodied composition resistors, that I keep only for curiosity, most are +50% marked value now, being made by "Erie" (?) according to the packages in 1957!
Dad told me that when he was first interested in electronics and was building something that required say 2% components, he would (in ignorance) try to select values from a batch wider tolerance types, apart from other problems, he found that the values of 20% resistors for instance would be within 20% but outside 10%, he says probably because they were selected from production runs as 5%, 10%, 20%.
I believe that he referred to the resistors Terry described. I have some of dads stock of those ceramic bodied composition resistors, that I keep only for curiosity, most are +50% marked value now, being made by "Erie" (?) according to the packages in 1957!
