The Repair and restoration of an early Racal RA17 . . . Page 10
These two circuits more or less form the heart of the Wadley Loop and are a mix of tag-board and point-to-point construction. As can be seen in the photograph on the left there was a considerable build up of grime on the two output connectors.
Xtal Oscillator before . . .
Xtal Oscillator after . . .
Harmonic Amplifier before . . .
Harmonic Amplifier after . . .
The Harmonic Amplifier is fairly component intensive but was easier to refurbish than expected. The large tubular capacitor was duly replaced with a smaller type (brown C) and I was able to mount it more neatly, albiet not as per the component layout. I decided to leave the 470R resistor (R18) with L20 around it as is.
