I think someone already gave you the short answer: no. On the transmit side, the VCO has a limited range of perhaps 6 MHz. The internal filter/duplexer might only allow 2 MHz between channels; it's narrow but not nearly as tight as a good external Bp/Br duplexer.
On the receive side, the VCO will also limit you to close spacing of channels. The entire receiver front end will let you have 2 MHz spacing. As the front end is used in conjunction with the internal filter/duplexer, you're limited in both respects. Even if you switch another duplexer in and out, the rest of the station would still prevent you from moving that far in frequency. It just ain't gonna happen. If you will be using the internal filter, coax length of the TEE cable is critical; any switching configuration you come up with would negate the proper operation of the internal unit. Sure, you could have two external duplexers and give up on the internal one. You probably would not want the amateur repeater to appear on any commercial frequency. A certain regulatory agency in Washington DC frowns on such activity. Bob M. ====== --- Charles Mumphrey <[EMAIL PROTECTED]> wrote: > Hello Group! > I have acquired a working Motorola MSF5000 > Repeater/Base. > It is a model C74CLB-7105AT, four channel, Analog > Machine currently > programmed to 464.1 TX and 469.1 RX. I have access > to technicians and > proper equipment to re-tune and re-program as > needed. > I am seeking suggestions from our vast > knowledge-base to find out if I > can leave the present fregs in as a channel one > repeater and add > 441.950 TX and 446.950 RX as a channel two repeater. > My present idea is > the HAM Freqs will be used 99% of the time as an > Amateur Repeater, with > the balance of usage, only as an "emergency back-up" > repeater for > business band by flipping a few switches. What is > the thinking about > retuning the 5000 for amateur usage and use an > antenna switch to switch > in and out a set of external cavities for the rare > business band. The > amount of output power is not an issue for me as > long as I can get > close to fifty watts with good receive sense. > Naturally, I do not wish > to perform a major "rebuild" or have a major "do it > your-self expense". > All assets are scrounged and labor is donated. > Any info will be considered and appreciated. Thank > You all for your > time and resources! > Charlie > > > "It is not the class of license the Amateur holds, > but the class of the > Amateur that holds the license." > > Charles Mumphrey > Amateur Radio Station Kc5ozh > Kc5ozh Rowlett Repeater: 441.325 Mhz + 162.2 > Kc5ozh Dallas Repeater: 441.950 Mhz + 162.2 > Kc5ozh Rowlett Repeater II: 441.950 Mhz + 110.9 > Rowlett R.A.C.E.S. Unit 823 > http://www.CharliesElectronics.com > http://www.hello-radio.org/ ____________________________________________________________________________________ Sponsored Link $420k for $1,399/mo. Think You Pay Too Much For Your Mortgage? Find Out! www.LowerMyBills.com/lre
