DB0FHN

G0FTD  > COILS    27.12.05 03:20l 34 Lines 1233 Bytes #999 (0) @ WW
BID : 773188G0FTD
Read: DL1LCA GUEST OE7FMI
Subj: Variable coil experiments ?
Path: DB0FHN<DB0MRW<DB0FOR<DB0SIF<DB0EA<DB0RES<DK0WUE<I0TVL<CX2SA<GB7YFS<
      GB7LGS<GB7ESX<GB7NNA
Sent: 051227/0025z 75876@GB7NNA.#31.GBR.EU $:773188G0FTD  [Witham, Esx]NNA V3.1

I have a query about making variable inductances.

What I'm curious to know is this:

- Wind a coil on (for example) a 20mm former.

- Now what would happen if you inserted a core of *smaller* diameter
  into the former which is (for example) on 5mm in diameter.

Would the small diameter of the core be effective or partially effective ?

I suspect it would be partially effective but at the time of writing I
have not done any tests.

I will do some tests shortly but would welcome anyone's practical
experience before I get the bits ready for testing.



                                 .-"""""-.
                                / 73's de \
                       .-.      |  _   _  |      .-.
                      (_. '._   | |_\ /_| |   _.' ._)
                          -._'-.(_   A   _).-'_.-'
                             '-._| _____ |_.-'
                            _.-'_\`"""""`/_'-._
                       .-.-'_.-'  `-----'   '-._'-.-.
                      (,_.'`                    `'._,)
                                Colonel Andy
                  Supreme Commander of the Trolley Platoon
                           And The Laughter Corps

       www.southgatearc.org/articles/g0ftd/shopping_trolley_wally.htm


Read previous mail | Read next mail