Question about Grundig Traveller Clock Radio
Hi. This radio works perfectlly on all bands except SW there it workes well till it gets to about 15 mhz then it stops receiving and cant tune. If you turn it off then on again it will let you tune one step (1 Khz) then cant tune.
I have tried adjusting the VCO and it does allow it to tune higher but then looses the bottom end. Im sure the pll is going out of lock becuase the VCO is running out of range but I have no idea were the problem will be. Maybe you have seen this problem before? Hope so..
Thanks in advance
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Posted on Jan 02, 2017
THAT IS COMMON WITH PLL TUNERS THAT THE SLIGHTESS
TWEAK ON THE TUNING KNOB WOULD MAKE THE DISPLAY MOVE .COMMON ON DIGTAL PLL TUNERS........
Posted on Feb 07, 2009
If the radio uses memory batteries, try changing these with new alkalines. The microprocessor needs this power to drive the display.
Posted on Feb 10, 2010
Ist Local Oscillator (PLL) stops working. It's desiged with bare minimum feedback to keep it's output reasonably clean. Removing (De-soldering) the screening box reduces losses, but it's still marginal. Something in the osc. circuit is temperature sensitive, so squirting it with freezer spray - or putting the set in the 'frig will get it going again. Have one like this, "Repaired" - been going for about 5 years and just quit again! If I get any better luck next time, I'll re-post this!
Posted on Jan 27, 2011
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