Troubleshoot Phillips 483x at converter stage (ech4 tube) (Techniek Radio/TV)

door Radiosterk , 21.06.2018, 03:46 (2352 dagen geleden) @ ruudtx

Goede morgen,

Thank you for Goldline, Ruudtx, Sieme for your fast response.

I did observation to the oscillator and pin 8 or anode heptode. It has same frequency output between oscillator and anode heptode which was arround 1.25 MHz. So, it was not 452 KHz at pin 8 anode heptode.

I tried to grounded the top cap of ech4 tube, the oscillator signal still appear at pin 8 anode heptode.

Warm Regards,

Winstony

Below picture is oscillator signal