[cathoderay57]

Thanks Mike. I should have said there is also some instability at the HF end of LW but I wasn't bothered by that as it works fine on 198kHz R4. I know failure to oscillate on LW sometimes indicates a weak frequency changer. I like to listen to 48/49m because there are sometimes pirate music stations popping up at weekend's, otherwise I would just live with it. I'll dig out some spare X63 and 6A8 and see if I get the same problem with more than one valve. To be honest apart from the oscillator coil there isn't much more to fiddle with. There is a loop inside the osc coil that you can bend to adjust LF alignment but as the frequency is spot on I didn't touch that. R3 grid stopper measures OK. I haven't checked R1 the Control Grid resistor yet. Cheers for now, Jerry