parnass@ihu1h.UUCP (Bob Parnass, AJ9S) (01/19/86)
x Regency (continued) TMR series: First generation crystal scanners. Come in all varieties of band coverage. Models with both UHF and VHF bands must use separate antennas for each band (disadvantage in mobile installations, but can be overcome by connecting two front ends via a capacitor). Easy to crystal: Radio Shack crystals work well. TMRs usually $2 and up ad ham- fests, often in poor condition. Don't pay more than $50, even if mint. Front ends must be tuned for selected por- tions within the bands for best sensitivity. Wide IF selec- tivity troublesome in urban/suburban areas. Primitive digi- tal scanning circuitry may become confused at times, but power off/on restores sanity. Not all that bad a deal if cheap. Replaced by Regency ACT units. WHAMO-10: Regency's first synthesized scanner. Discontin- ued long ago. Appearance more like a crystal scanner, with a single LED per channel. User has to break off teeth on a metal 'comb' for each channel according to a code book. External frequency control unit DFS-5K optional. UHF VCO reference oscillator drifts on some units. Soldered sheet metal shields around some circuitry make access to some com- ponents difficult for servicing. Comb sockets prone to bad connections after moderate use. -- =============================================================================== Bob Parnass, Bell Telephone Laboratories - ihnp4!ihu1h!parnass - (312)979-5414