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Old 26th Jan 2023, 7:39 pm   #101
Rich Woods
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

While we are discussing 247m (1215khz), back in the early 1990’s I had a wireless with LW that was more biased towards MW than normal. I used to receive a strong Virgin Radio signal from Droitwich on 832m (360khz). I could never make my mind up if this was a fault with my set or a harmonic signal from Droitwich, who would ever know, as this is outside normal broadcast range. Any ideas anyone?
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Old 26th Jan 2023, 8:23 pm   #102
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

Quote:
Originally Posted by Rich Woods View Post
While we are discussing 247m (1215khz), back in the early 1990’s I had a wireless with LW that was more biased towards MW than normal. I used to receive a strong Virgin Radio signal from Droitwich on 832m (360khz). I could never make my mind up if this was a fault with my set or a harmonic signal from Droitwich, who would ever know, as this is outside normal broadcast range. Any ideas anyone?
Poor image rejection within the set. Subtract 2x the IF from the Virgin frequency of the time and there's your answer. I remember servicing an HMV transistor portable with this very problem, except it was Radio 1 in those days.
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Old 26th Jan 2023, 10:11 pm   #103
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

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Originally Posted by Cathovisor View Post
Quote:
Originally Posted by Rich Woods View Post
While we are discussing 247m (1215khz), back in the early 1990’s I had a wireless with LW that was more biased towards MW than normal. I used to receive a strong Virgin Radio signal from Droitwich on 832m (360khz). I could never make my mind up if this was a fault with my set or a harmonic signal from Droitwich, who would ever know, as this is outside normal broadcast range. Any ideas anyone?
Poor image rejection within the set. Subtract 2x the IF from the Virgin frequency of the time and there's your answer. I remember servicing an HMV transistor portable with this very problem, except it was Radio 1 in those days.
Thanks that explains it then. Much appreciated.
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Old Yesterday, 12:18 am   #104
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

That would explain the station I get at the same part of the LW band on my bedside transistor radio, a Realistic "Voice of the world" bought in a sale at my local Tandy branch many years ago.
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Old Yesterday, 8:38 am   #105
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

A bit OT I know but does anyone know what the band between MW & LW was historically used for.
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Old Yesterday, 8:43 am   #106
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

There are navigation beacons there (still!)

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Old Yesterday, 9:24 am   #107
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Default Re: Absolute Radio to end AM transmissions on 23/01/23

Well, we've left Absolute Radio far behind and have circled the end-of-AM plughole a few times. There seems to be nothing left to say on the original topic.

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