"gary"

My Fm4 has a strange problem, I have replaced the back up battery and this
is working, if I store a station at 88.10 mhz when I switch it back on the
frequency comes up at 88.00 mhz for the first 5 - 10 minutes, it then
slowly creeps up to 88.5 then 88.10, it does this on all stations stored.

Does anyone have any ideas about this


** I take 88.5 should be 88.05 ????

So the tuned frequency drifts up by only about 100 kHz as it warms up -
NOT 500 kHz.

Despite appearances, the FM4 is NOT frequency locked with a digital
frequency synthesiser, like most other tuners with a digital readout.

Tuning frequency is controlled by analogue circuitry via "varicaps " - so
cannot be entirely drift free.

However, the digital readout shows the ACTUAL operating frequency of the set
with high ( ie crystal ) accuracy.

There is likely NOTHING wrong with your FM4 - so leave it alone.

Please disregard my earlier post.




........ Phil