expo m 100 expander kit

[grimace]

Look for what crystals are used in the m kit

 

[nomadradio]

Hmmm. Looks as if the Gemtronix GTX4040 and 5000 were the only radios I found for that kit. The PLL crystal in that radio is 15.250 MHz. Seems to me that back in those days the EXPO kits only went up or down 44 channels, not 45 like a "10-meter" radio. Adding 440 kHz to 11.250 would be 11.690 for upper channels. Likewise the lower band would be 10.81 MHz.

Best I can tell from the schematic, anyway.

73

 

[grimace]

I was looking at the 240d on cbtricks the info for the expo kit it says to remove 36.570 MHz mixer crystal

 

[nomadradio]

36.570 MHz mixer crystal

Don't know where they got that. The schematic shows a 15.25 MHz crystal that mixes with the radio's VCO and then feeds into the PLL. Only other crystal in the radio is 9.785 MHz and it's not part of the PLL.

Don't ever remember installing a "M" kit.

73