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Sideband · 23rd Jul 2010, 7:07 pm

A mobile phone signal will probably crash through at I.F if it's close enough. That doesn't mean the oscillator is working. That annoying bleep that comes through just as a text message arrives just means that the aerial circuit is probably ok. If you have another DK91 you could try it. You could also try the old trick of picking up the oscillator on another radio. Just get a working MW radio and tune it to a quiet spot then place the BAC31 next to it and tune the BAC31 across the dial. At some point you should hear a whistle on the working radio. If so, the oscillator is working, if not, there's your problem. Try the DK first. If no luck then it's probably a low reccy.

Sorry..haven't got a spare EZ40 or you would be welcome to it. The volts do seem a bit low and it doesn't take much to stop these valves from working. They are probably OK down to a filament voltage of about 1.2. Much below that and they struggle, especially if they are a bit below par anyway.

SB.

23rd Jul 2010, 7:07 pm	#5
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,580	Re: Bush BAC31 motorboating A mobile phone signal will probably crash through at I.F if it's close enough. That doesn't mean the oscillator is working. That annoying bleep that comes through just as a text message arrives just means that the aerial circuit is probably ok. If you have another DK91 you could try it. You could also try the old trick of picking up the oscillator on another radio. Just get a working MW radio and tune it to a quiet spot then place the BAC31 next to it and tune the BAC31 across the dial. At some point you should hear a whistle on the working radio. If so, the oscillator is working, if not, there's your problem. Try the DK first. If no luck then it's probably a low reccy. Sorry..haven't got a spare EZ40 or you would be welcome to it. The volts do seem a bit low and it doesn't take much to stop these valves from working. They are probably OK down to a filament voltage of about 1.2. Much below that and they struggle, especially if they are a bit below par anyway. SB. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman..... Last edited by Sideband; 23rd Jul 2010 at 7:12 pm.