Kevin, Other than being physically smaller, I don't know of any helical resonator design issues that preclude your Micor mod from being adapted to the Mitrek. I am modifying some low-band Mitreks for 6m duty, but all that takes is a handful of capacitors. I have yet to address converting a high-band Mitrek to 2m, so I have no idea what issues may arise.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Kevin Custer Sent: Saturday, December 20, 2008 5:41 PM To: [email protected] Subject: Re: [Repeater-Builder] Converting a Range 2 VHF Mitrek to Range 1 (WAS: Holiday Special...) Eric Lemmon wrote: > Only one of the five front-end coils for a Range 1 VHF Mitrek (HLD4081, > 136-146 MHz) is still available from Motorola Parts. That one is part > 2480032A07, the violet coil in L1, for $ 4.15. > > The only option may be to tack on some extra wire to the existing coils. > Although modifying the tuning screws may work, I suspect the Q will suffer. Eric, I would think a coil retro like what I make available for the MICOR will also work in the Mitrek. This approach would be way better than tacking some added wire onto the existing coil or modifying the screws in which I know that is a bad idea. Is there something special about the Mitrek front-end that you believe would prohibit such a conversion? It's been a while since I messed with the Mitrek but I don't remember anything that would prohibit the correct length coil to be installed... Kevin
