Hi Max,

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OK you need to check J3006 TX I.F., and J3007 TX LO, they are common to VHF and UHF, The LO is the bit that changes frequency, check it does and the level is the same on VHF and UHF, if all good then Q3002 is looking suspect.

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Not sure of the actual frequencies, or if the LO is higher than the IF or lower, The IF can be 1.8 to 30MHZ, no idea what frequency is used for VHF and UHF say 15MHz, then then the LO would be 425 MHz for 440 MHz

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73

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Andrew

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