Mark, You have totally confused me now. I don't have the feintest idea what the ohms/mm is all about. But lets put it this way. I will be using the oscillator circuits in transmitters and receivers. The one will transmit at +- 100MHz (FM Band) and the other at approxiamately 280 MHz. What can you tell me about this? Thanx Werner WernerS@fsl.gov.za ----- Original Message ----- From: "Mark Hull" To: Sent: Thursday, November 30, 2000 12:37 PM Subject: [EE]: Coil Imprinted on PCB Hi Werner What frequency are you working at? Most PCB coil calculations work in impedance terms as in ohms / mm when at RF frequencies. You then just have to zigzag the track to fit into the space you're using. Below RF you have to use conventional components. Cheers Mark ------------------------------------------------------------------- Mark Hull Engineering/Technical EMS (Africa) (Pty) Ltd PO Box 1026, Melville, 2109, South Africa Ph +27 11 482 4470 Fax +27 11 726 2552 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.