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, RHF wrote: YK-88A-1 = 6 kHz "Optional" AM Filter - Plug-In YK-88A = 6 kHz "Optional" AM Filter - Solder-In My old TS430 had the solder-in filters. The newer TS-690 (450) has plug-in filters. I understood that the only difference between older and newer YK-88 series filters was the circuit board, denoted by the -1 suffix. So, if you need a solder-in YK-88SN for example, you should be able to unsolder the filter from the YK-88SN-1 circuit board and use that. Are there some matching components on the circuit board that I missed? Fred K4DII |
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