15-05-2011, 05:29 PM
Connect the aerial straight to the grid of the Frequency Changer valve. (Not the triode section!).
If signals come in, then it's the aerial side. If not, it's the oscillator side. The HT could be low. Take the mains tapping down to 200 - 225 volt section and see if it comes to life. Don't leave it like that though!! Always worth checking R19 (On my sheet.) This is between the Audio Output Transformer and the Smoothing Block.
Meter out the trimmers (Pull one and off first!) and the coils. The 6C9 valve is not directly equivalent to the ECH42. Whether it will work in this position is open to question. You can get them of Ebay...
http://shop.ebay.co.uk/i.html?_nkw=6c9+tube&_sacat=0&_odkw=6c9+valve&_osacat=0&_trksid=p3286.c0.m270.l1313
It may be worth converting it to a P75? ECH42's are easier to find!
Cheers,
Steve P.
If signals come in, then it's the aerial side. If not, it's the oscillator side. The HT could be low. Take the mains tapping down to 200 - 225 volt section and see if it comes to life. Don't leave it like that though!! Always worth checking R19 (On my sheet.) This is between the Audio Output Transformer and the Smoothing Block.
Meter out the trimmers (Pull one and off first!) and the coils. The 6C9 valve is not directly equivalent to the ECH42. Whether it will work in this position is open to question. You can get them of Ebay...
http://shop.ebay.co.uk/i.html?_nkw=6c9+tube&_sacat=0&_odkw=6c9+valve&_osacat=0&_trksid=p3286.c0.m270.l1313
It may be worth converting it to a P75? ECH42's are easier to find!
Cheers,
Steve P.
If we've always had that, why is the car boot open? You aren't smuggling in another old TV are you...?
