canabalised micronta 4003 coil

[slowsweeper]

ive got to the stage in my minipulse build of trying to knock up a rough working coil,ive pulled apart an old micronta coil to maybe use the wire,the thicker wire witch is the outer shelded part of the coil,(recive?) is still on the thin side,at a rough guess 0.2 im hoping somone here knows the exact so i can calculate diamater and no. of turns any help would be appreciated

[Qiaozhi]

You can use the Coil Calculator here -> Coil Calculator

[Silver Dollar]

Usually 20 - 30 turns gives 300 uh but knowing the diameter would help pin it down.
If you have an inductance meter just remove turns until you get 300 uh (or whatever
value you are looking for).

It's not going to give the best performance as you need some distance between
windings to keep the capacitance down so Teflon coated wire will work better.

[slowsweeper]

all i have is an antenna analyser from my other hobby, and it gives a reading of 1.8 uh at 18 megaherts and gives no response when rigged up to the minipulse board so in its present state its way out,im not after perfomance at the moment just a simple basic working coil,is ther any mathmaticle convertion i could use to make the antenna annalyser usefull?

[Silver Dollar]

Well the best I could do is tell you 66 feet of wire should make a reasonable coil for a PI MD...

[slowsweeper]

ok thanks for all the input, i recon theres enough wire there!