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agus_h_y · 5th Apr 2015, 5:21 pm

Hi Peter

Thanks for responding my post.
Finally i fixed the Local Oscillator, the culprits were the 3 (three) caps. First capacitor is the coupling to Oscillator Coils, second and third caps is the bypass from first plate and second plate of triode.

The oscillator finally i can configure it out as Butler Oscillator, so the both Triode is working for oscillating function. When in XTAL mode, the XTAL is connected from cathode to cathode. It is a clever configuration. When in VFO mode, they used plate tune oscillator.

So now band BCD is working, the remaining bands are easy, because i know for sure RF coils are open circuited due to copper corrosion inside the wax. I don't know why.

Pfew....

Thank you
Agus.

5th Apr 2015, 5:21 pm	#20
agus_h_y Diode Join Date: Dec 2014 Location: Depok, West Java, Indonesia Posts: 6	Re: Redifon R153. Hi Peter Thanks for responding my post. Finally i fixed the Local Oscillator, the culprits were the 3 (three) caps. First capacitor is the coupling to Oscillator Coils, second and third caps is the bypass from first plate and second plate of triode. The oscillator finally i can configure it out as Butler Oscillator, so the both Triode is working for oscillating function. When in XTAL mode, the XTAL is connected from cathode to cathode. It is a clever configuration. When in VFO mode, they used plate tune oscillator. So now band BCD is working, the remaining bands are easy, because i know for sure RF coils are open circuited due to copper corrosion inside the wax. I don't know why. Pfew.... Thank you Agus.