=  NOW 40 WPM  =  

DENTRON CLIPPERTON V WITH SERIES CAPACITANCE TO CANCEL OUT THE
SERIES INDUCTANCE.  CRYSTAL TYPES FOR THE HR 2 FAMILY THE
TRANSMITTER OF THE HR 2 AND HR 2A USED CRYSTALS THAT WERE AT 1/24 OF
THE OUTPUT FREQUENCY.  THE CRYSTALS WERE IN A HC 25U MINIATURE
ENCLOSURE.  THE HR 2B VERSION USED A CRYSTAL THAT WAS 1/18 OF THE
OUTPUT FREQUENCY, AS WAS DONE WITH MOST 2 METER AM RADIOS.  THE
RECEIVE CRYSTALS USED THE FOLLOWING FORMULA FREQUENCY 10R70 MHZ / 3
THIS CRYSTAL WAS ALSO IN A CLASSIC RADIO THE REGENCY HR 2
TRANSCEIVER TWO METER FM GREW RAPIDLY AFTER REGENCY INTRODUCED THEIR
LOW COST BUT WELL PERFORMING HR 2 SOLID STATE 2 METER FM TRANSCEIVER
SEE FIGURES 1 AND 2.  REGENCY WAS THE MARKETPLACE NAME FOR THE
RETAIL SALES DIVISION OF INDUSTRIAL DEVELOPMENT ENGINEERING
ASSOCIATES IDEA LOCATED IN INDIANAPOLIS, INDIANA.  REGENCY
BACKGROUND IDEA CREATED THE FIRST TRANSISTOR RADIO IN 1954, THE
REGENCY MODEL TR 1.  REGENCY MADE THE FIRST SOLID STATE AMATEUR
RADIO PRODUCT THE ATC 1 SHORTWAVE CONVERTER WITH A BUILT IN BFO AND
Q MULTIPLIER CIRCUIT THAT WAS USUALLY USED WITH AN AUTOMOBILE RADIO
IN MOBILE SERVICE.  IN 1956, MOST AMATEUR RADIO PHONE COMMUNICATION
WAS ON THE AM MODE, WHICH COULD BE RECEIVED USING THE CONVERTER WITH
AN AUTOMOBILE RADIO.  REGENCY MADE PUBLIC SERVICE SCANNER RADIOS
THAT COVERED THE VHF LOW BAND FROM 30 TO 50 MHZ, THE HIGH BAND FROM
152 TO 174 MHZ, AND THE UHF BAND FROM 450 TO 470 MHZ.  THE HR 2 WAS
IN THE SAME SIZE CABINET AS THE ORIGINAL SCANNER RADIO RECEIVERS.
THE PUBLIC SERVICE SCANNER RADIOS WERE VERY POPULAR ON THEIR OWN.
THE REGENCY HR 2 REGENCY ANNOUNCED THE HR 2, A 2 METER FM
TRANSCEIVER, IN 1970 FOR 229.  IT BECAME WILDLY POPULAR BY 1971.  IT
OPERATED WITH A 13R8 V NEGATIVE GROUND POWER SOURCE SUPPLYING 3 A
DURING TRANSMISSIONS, WHICH WAS PERFECT FOR MOBILE OPERATION AND
PRACTICAL FOR PORTABLE FIELD USE.  IT WAS PROTECTED AGAINST OUTPUT
TRANSISTOR FAILURE IF THE ANTENNA VOLTAGE STANDING WAVE RATIO VSWR
WAS TOO HIGH.  IT USED A DIRECTIONAL COUPLER TO DETECT EXCESSIVE
REFLECTED POWER AND CIRCUITRY TO CUT DOWN THE DRIVE POWER TO PREVENT
DAMAGE TO THE MOTOROLA FINAL POWER OUTPUT TRANSISTOR.  MODIFICATIONS
REGENCY MADE MANY VARIATIONS OF THE BASIC HR 2 DESIGN.  THEY MADE
VERY SIMILAR PRODUCTS FOR THE 220 MHZ AND 440 MHZ BANDS.  THE HR 6,
A SIMILAR RADIO IN A LARGER CABINET, WAS OFFERED FOR SALE AS A 6
METER FM TRANSCEIVER.  REGENCY MADE RADIOS FOR A BASE STATION WITH
THE ABILITY TO SWITCH CRYSTAL FREQUENCIES FOR THE RECEIVER AND
TRANSMITTER SEPARATELY, AS THE HR 6 HAD.  THIS SEEMED LIKE AN
IMPORTANT ABILITY BEFORE THE CHANNEL ARRANGEMENTS FOR 2 METER AND 6
METER FM BECAME MUCH BETTER DEFINED.  REGENCY COMBINED THE IDEA OF A
2 METER FM TRANSCEIVER TRANSMITTER RECEIVER IN REALITY AND THE
SCANNING RECEIVER FOR PUBLIC SERVICE MONITORING TO CREATE A 2 METER
RADIO THAT SCANNED FOR ACTIVITY ON THE SELECTED CHANNELS.  TODAY,
TRANSMITTING ON 146R16 MHZ AND RECEIVING ON 146R88 MHZ IS NOT VERY
POPULAR, BUT MANUFACTURERS IN THE EARLY 1970S WANTED TO OFFER THE
OPTION.
=  END OF 40 WPM TEXT  =  QST DE W1AW  <