Re: Measurement Receiver Inductors
I was a manufacturing engineer for Southcom International back in the dark ages. We had the coils wound by a subcontractor (our production ladies working at home) and then adjusted them tighter or loser using Boonton Q meters. I was going crazy writing engineering change notices on the coil drawings with each new batch of cores till I was allowed to specify the winding instructions as + or - a number of turns. It was probably +/- 4 turns for a coil of 120 turns.toggle quoted messageShow quoted text
So yes, for critical applications, toroids have to be tweaked by squeezing or expending the winding around the core or even changing the number of turns.
We once received a coil from a commercial coil manufacturer where their wire spool had run out in the middle of the winding and another wire was joined with nice square knot on the insulated wire. Couldn't figure out how a single toroid could not have continuity from one end to the other :)
On 2/19/2016 9:23 PM, k5ess.nothdurft@... [PHSNA] wrote:
Wonder if others have found that the inductors called for in the