Philips India radio B6CA37A/01 (Algemeen)

door Pandu Rajan , 26.07.2015, 13:03 (3410 dagen geleden)

Dear Members.

The schematic of this set is on the forum site. It is a 6 band set with band spread on 19m,25m,and 31m bands. The other 3 bands are MW,SW1 and SW2. The SW1 band covers 11m to 16m. I am restoring one of these sets and I am facing the following problem. I have been able to align all the bands properly except SW1. When I start the alignment I am able to get the audio tone in the speaker with pointer set at 25.5Mhz and the signal generator also set at 25.5Mhz. As the pointer is moved towards the low frequency side and the signal generator also moved towards the LF side the signal strength starts reducing and around the middle of the dial it is completely lost. So Towards the low frequency end i.e. 17.9Mhz no tone is heard. If you go back towards the HF side the tone again comes back. How I should trace this fault?

Regards
P.Rajan