Murphy Barrel sets

[Geordie McBoyne]

I recently worked on a V410.   In my opinion this the best of all the Murphy barrel sets.  After doing a recap job the frame linearity was still bad. This turned out to be a hidden capacitor. C92 is positioned on the centre panel which has the main voltage selector. Also, as a matter of course replace the screen grid decoupling capacitors of the sound and vision IF amplifiers.   These 0-001microfarad capacitors are of the type that resemble resistors in as much they have coloured bands. I believe this type of  capacitor was used because it has a degree of inductance in order to give a reaction effect to in increase the gain of the amplifiers.  Of course I could be wrong.   Nevertheless, the receiver has exceptional gain characteristics.  It displays a healthy snowstorm on the screen on no signal conditions.  something you rarely see on a TV receiver that has only one common vision and sound IF amplifier and single IF stages for vision and sound.
The attachment shows the position of C92 which is in the frame linearity feedback network.

Geordie McBoyne.