Dear all,
I have bought a very old tuner Sanyo FMT 203L. The FM band works very nice with a random length (1meter may be) antenna hooked into 300ohm antenna port in the receiver's back. But when I try to listen to MW and LE band they are so faint, with highest volume I barely hear the Long wave and medium wave channels. One of my friends told me to open up and try tuning the IFT, but I do not want to do that blindly. Could you please suggest me how to proceed step by step to fine tune the radio inside with ofcourse the tuning of the IFTs if necessary. Since I am hobbyst, I have access to several measurement instruments in hand:
Tektronix 50 MHz scope with max vertical resolution (per div.) 500micro Volt.
Two digital multimeters.
One wavefunction generator (cheap chinese, but works adequitely, 2MHz max).
Capacitance meter, (inductance meter will reach by post in few days).
Plenty of registors,capacitors,transistors (discrete components).
I could not find the manual of 203L but here is similar model service manual:
http://elektrotanya.com/sanyo_fmt-205l_stereo_tuner_sm.pdf/download.html
Let me have your suggestion.
Many thanks.
I have bought a very old tuner Sanyo FMT 203L. The FM band works very nice with a random length (1meter may be) antenna hooked into 300ohm antenna port in the receiver's back. But when I try to listen to MW and LE band they are so faint, with highest volume I barely hear the Long wave and medium wave channels. One of my friends told me to open up and try tuning the IFT, but I do not want to do that blindly. Could you please suggest me how to proceed step by step to fine tune the radio inside with ofcourse the tuning of the IFTs if necessary. Since I am hobbyst, I have access to several measurement instruments in hand:
Tektronix 50 MHz scope with max vertical resolution (per div.) 500micro Volt.
Two digital multimeters.
One wavefunction generator (cheap chinese, but works adequitely, 2MHz max).
Capacitance meter, (inductance meter will reach by post in few days).
Plenty of registors,capacitors,transistors (discrete components).
I could not find the manual of 203L but here is similar model service manual:
http://elektrotanya.com/sanyo_fmt-205l_stereo_tuner_sm.pdf/download.html
Let me have your suggestion.
Many thanks.