You might ask in the Yaesu group. 73, Ed KA9EES But then in case a battery, say DL1/3NB or > CR1/3N used in the tuning and display circuit like in case of Yaesu 757 GX, > how to go about it? Removing the battery from its solders without a back up > will cause a loss of memory? will any one enlighten me, please