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若将三洋M2511盒式录音机增加一个2.38cm/s慢速档,用于学外语、会议录音等场合,可使每盒磁带使用时间增长一倍,大大节约磁带。以一台机拥有10盘磁带计算,改后相当于20盘,可节约50元左右。其改动方法为,将电机稳速电路中电阻R_(102)470Ω上并联一只100～150Ω电阻,即得到2.38cm/s档。为了使正常的4.75cm/s档也能使用,利用机中不用的DC7.5V外电源插座作变速开关。将印制板上该插座焊片上通电池“+”极的红线焊下,改焊到交流电插座内附的交直流转换开关紫线的焊点上,紫线改焊到电机稳速小印制板上R_(101)350Ω可变电阻与R_(102)470Ω电阻相连点处。再另加一根线,一头焊于470Ω的另一端,另一头串一只100～
If the Sanyo M2511 cassette recorder to increase a 2.38cm / s slow file, for learning foreign languages, conference recording and other occasions, each cartridge can double the use of time, save the tape. To a machine with 10 tape calculation, equivalent to 20 after the change can save about 50 yuan. The change method is that the motor speed circuit R_ (102) 470Ω in parallel with a 100 ~ 150Ω resistor, that is 2.38cm / s file. In order to make the normal 4.75cm / s file can also be used, the use of DC7.5V outside the machine outlet for variable speed switch. Solder the red line of the “+” pole on the socket soldering pad of the printed board to the soldering point of the purple line of the AC-DC conversion switch included in the AC outlet, Board R_ (101) 350Ω variable resistor and R_ (102) 470Ω resistor connected to the point. Add a further line, a welded on the other end of the 470Ω, the other string a 100 ~