09-25-2015, 05:48 PM
> My only concern is my DC resistance measured 3.5 ohms and the schematic called for 2.66. Should this make any difference?
Short answer is no. DC resistance isn't that important, it's the inductance that is.
>For instance would a coil with 17 turns of 38g wire have more or less resistance then a coil with 17 turns of 36g wire?
More, 38g is smaller than 36g and can handle less current. There are charts that will tell the resistance per ' of copper wire, as the ga goes higher the resistance goes up too.
>Also forgot to bring this up. on the osc coil that is open the cap and resistor on the cathode go to ground and are in series after the coil. in my set it looks like these two parts and parallel with the open osc coil. Was this a circuit change for later sets??
I think the cap and resistor are ground through the coil bracket
Sleep well tonight don't worry about resistance of inductors.
Terry
Short answer is no. DC resistance isn't that important, it's the inductance that is.
>For instance would a coil with 17 turns of 38g wire have more or less resistance then a coil with 17 turns of 36g wire?
More, 38g is smaller than 36g and can handle less current. There are charts that will tell the resistance per ' of copper wire, as the ga goes higher the resistance goes up too.
>Also forgot to bring this up. on the osc coil that is open the cap and resistor on the cathode go to ground and are in series after the coil. in my set it looks like these two parts and parallel with the open osc coil. Was this a circuit change for later sets??
I think the cap and resistor are ground through the coil bracket
Sleep well tonight don't worry about resistance of inductors.
Terry
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