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strange DAB phenomenon
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I recently got a Pure Evoke 1XT, and it works very well, though I
think I'm on the borderline of a good reception area, as I have to
position the radio carefully to get good reception.
But I've noticed something strange when I switch it on in the morning.
For the first 3-5 minutes, I get perfect reception, then it gradually
gets worse over a minute or so, until the output is totally
unintelligible, and the 'signal quality' read-out is way down to 30 or
so (from the 100 it was when I switched on). This lasts for about 5
minutes, then reception climbs back to 100, and I have no more
problems for the rest of the day.
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I had a Pure Evoke-1 which started doing something similar after about a
year although it did not get better after a while as yours does. Signals
would degenerate into total burbling and stay like that - signal strength
at full-scale. Sent it back to Pure who replaced it and said it had been
'crystal drift' so there must have been an off-frequency crystal oscillator
causing decoding errors. But I can't see this being the cause of your own
problem as yours recovers after a further 5 minutes you say.
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Perhaps a crystal is just slightly off, and varies as things warm up.
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My Blaupunkt Woodstock dab54 has always done the same thing: In cold
temperatures it start, but after maybe 15 seconds it starts fading
deeply (the s-meter going from full to zero even though we are next to
the transmitter). This lasts for about 3 minutes, after which operation
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"cold temperatures" ? :-)
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On a chilly day like today it was 10C, which causes the Woodstock to
fade briefly after turn-on. Anything colder will cause more severe
fading. Below freezing point you don't get to listen to dab on a short
trip. That's why I use fm for the first 5 Km.
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1999 we have -49.0°C in north Sweden (Lappland).
1966 we have -52.6°C in north Sweden (Lappland).
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It's all relative.
When my Auntie and Uncle came back from Cyprus, they said that in winter
time if the temperature went below 80 (that's Fahrenheit, it would be
about 25+ in Celsius) the locals would be sitting around their log
fires, thinking it was cold.
Here in the UK, 80 degrees is considered a bit of a heatwave.
Richard E.
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is normal.
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Richard E.
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(The replacement Evoke is still OK at the moment!).
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Does anyone here know what's happening? It can't be the radio 'warming
up', or else why would reception be perfect for the first few minutes?
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Are you having a shower or using electrical equipment that might
interfere with the radio. Shower certainly affects mine. Modem does
too.
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