That combination number is for a Mastr Progress Line Executive Series mobile radio, which was offered in three low-band splits: A (25-33 MHz), B (33-42 MHz), and C (42-54 MHz). Since your radio is in the middle split, there are some modifications necessary to achieve proper operation at six meters. Unlike later GE radios, this model requires many coils to be changed, along with many capacitors, in order to operate efficiently in the 50-54 MHz band. It will take some effort, but it is do-able. If you have only one crystal for the radio, it will be difficult to first verify that it works on its original frequencies, before starting the modification for 6m. Take note that the B and C splits both use low-side injection for the RX oscillator, but the C split crystal output is tripled while the B split is doubled.
The prognosis for a full-duplex modification is not so good. One fellow in my area spent many months trying to convert the same model of radio into a repeater, but could not avoid significant in-cabinet desense, He finally used separate radios for RX and TX, with all power and signal lines filtered, and got it to work. 73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of kd6aaj Sent: Saturday, October 25, 2008 10:17 PM To: [email protected] Subject: [Repeater-Builder] seeking executive mobile radio information I have a low-band RG64TCN22 GE Executive Mobile, including the slide- on bracket (I used a "10A" key to unlock it). According to the LBI list, the maintenance manual I need is LBI-3748. It is not in the LBI section, or on the "Wish List". Incidently I DO have LBI-4124 for Master Progressive Line, which is on the "Wish List". According to the numbers, this radio is a trunk-mount mobile,12VDC negative ground, 38-64 Watts, 20 MHz channel spacing, 33-42 MHz, 2 freq TX and 2 freq RX. I don't have the control head, but the inside is sparkling clean, no dust, corrosion or any other signs of physical damage! The one crystal in it reads 43 MHz. It has 2 tubes in the PA. I got it in 1993 as a left-over from the 2-way shop I used to work in. If I can get it to work, I could make a 6 meter repeater out of it. Does anyone have info on this beast? 73, KD6AAJ
