what would it take short of some cash to have one sent to me here in New Zealand as a one off key, not that i need one, i am told i am a Hoarder
Marcus On Sun, Sep 5, 2010 at 4:38 PM, KP3FT <kp...@yahoo.com> wrote: > > > Hi all, > Thanks for the previous advice on the Mitrek lockout key; I ordered one off > Ebay and it worked fine. > Opened the radio up and everything looks visually OK, all the channel > elements are there, no burned components, etc. I read through the > Repeater-Builder's Mitrek webpages and figured out the pins for hookup. I > was wondering if anyone could look over some sections of the Mitrek > schematic<http://groups.yahoo.com/group/Repeater-Builder/files/Mitrek%20Lowband/> > I posted in the Files section under the folder "Mitrek Lowband", regarding > the PTT circuit. I circled the areas in question in red and blue. (I also > hyperlinked to the various schematic sections in this message). I just want > some verification before I start wiring up the radio. I found another > website where the author said to jumper pin #1 to pin #25 on the interconnect > board > connection<http://f1.grp.yahoofs.com/v1/wBWDTM_dzohoZJ1M25svBvhmyUk3YStFZKcbHdVjzcHCTQSgFE9U0-wFOU3PHUQL3NIWEGUG1ndFPkhYrLdul9o1/Mitrek%20Lowband/interconnect_board.jpg> > , > and then just ground pin #13 of the cable connector (or pin #13 on the front > of the radio in my case) for PTT operation. (Pin #24 of the interconnect > board connector is the same as pin #13 of the cable connector) My questions > are: > 1. What does the jumper do and is it beneficial for beacon operation? > Here is the schematic section > <http://f1.grp.yahoofs.com/v1/wBWDTDg1U9VoZJ1MJmrSx6917ZszwfFtwKxh8c5tPrKp1IiKeb_dd_z6o52LjBRH6eMjcKXGvRCwASnBIgIJ8PUE/Mitrek%20Lowband/mitrek_PTT.jpg> > of > the PTT circuit. > 2. I will be using the Mitrek solely as a transmitter beacon, so RX is not > necessary. I'll have to disable the antenna > relay<http://f1.grp.yahoofs.com/v1/wBWDTJ0GE-FoZJ1MoIPDEYBXLqbbFZph6Eymc3u9dFQYPG2vhGbVYg92QCtUhDuNVVr89_tTKgsBysS0H3B3Q5eW/Mitrek%20Lowband/Antenna_Relay.jpg> > because it won't last long during constant beacon operation, plus it isn't > even needed. Can I just disable the relay by cutting power to it and wire > the PA output directly to the antenna jack (two points circled in blue)? > Or, just keep voltage on the relay so the RX section is always switched out > and the TX switched in? Probably easier that way. > 3. The radio has the PL board installed; can I just remove it so it doesn't > introduce anything into the carrier, or just leave it alone? I can't tell > from reading through the various websites and the schematic if the PL-encode > is enabled automatically or if it needs switching on, in which case I will > leave it off. > Thanks for any advice. > Jeff KP3FT > >
