June 24, 1988 HW-24HT Bulletin No: VHF/UHF Transceiver HW-24HT-1 Increasing The Frequency Coverage of The Receiver The HW-24HT Transceivers now shipping have a VHF range of144.00 to 147.995 MHz and a UHF range of 438.00 to 449.995 MHz. However, the Transceiver can be programmed to receive a VHF range of 130.00 to 169.99 MHz. The UHF range can be changed to 340.00 to 379.99 MHz or 360.00 to 399.99 MHz in addition to 400.00 to 469.99 MHz. Here's the programming procedure needed to operate the receiver in the wide band mode. Refer to the HW-24HT Owner's Manual [PN 595-4141] for general operating procedures. -- Set the Channel step rate to 12.5 khz [see page 2-32 in owner's manual]. -- Select A VFO and dial a frequency of 14X.XX75 [X=Don't care]. -- Press FUNCTION button and the 7/RPT button. The display shows a "-" offset. -- Press FUNCTION button and then 8/+/- button. This selects the "+" offset. -- Press FUNCTION button and the */ENT button. -- Again, press FUNCTION button and then */ENT button. NOTE: The receiver is now set to receive frequencies from 130.00 to 169.99 MHz on VHF and 340.00 to 379.99 MHz and 400.00 to 469.99 MHz on UHF. To select the UHF range from 360.00 to 399.99 MHz and 400.00 to 469.99 MHz, continue with the following steps. -- Press the RCL button. -- Press the FUNCTION button and then the C/BAND button. The VHF range from 130.00 to 169.99 MHz and the UHF range from 360.00 to 399.99 MHz and 400.99 to 469.99 is now set. NOTE: To again select the 340.00-379.99 UHF range, you'll have to press the RESET button (to return to narrow band mode) and then repeat the first 6 steps. The second production of HW-24HT Transceivers will be wired to receive the wide band of VHF and UHF frequencies. To determine if the Transceiver is wired for wide band operation, try entering a frequency between 130 and 144 MHz; if the frequency is accepted, the transceiver is wired for wide band operation. ------------------------------------------------------------------------------------------------------------------- October 28, 1988 HW-24HT Bulletin No: VHF/UHF Transceiver HW-24HT-2 Antenna and Battery Case Part Numbers Replacements for the antenna and batter case are available from Heath Parts Replacement. The Heath part numbers are: Antenna: 969-1391 Battery Case 969-1394 -------------------------------------------------------------------------------------------------------------------- October 27, 1989 HW-24HT Bulletin No: UHF/VHF Tranceiver HW-24HT-3 Lithium Battery Source Heath Parts Replacement does not stock the lithium battery for this unit. A source for the lithium battery is: DIGI-KEY 701 Brook Avenue South Thief River Falls, MN 56701 Battery type CR2032 --------------------------------------------------------------------------------------------------------------------