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 Moved my Tasma away from my router and cable modem
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 Return to top of page · Post #: 1 · Written at 8:13:17 AM on 16 November 2013.
Wa2ise's avatar
 Location: Oradell, US
 Member since 2 April 2010
 Member #: 643
 Postcount: 831


Not something that will set the radio collecting world on fire Smile but my cable modem and router was RFIing this radio where I used to have it. The router and cable modem is in the basement, and this radio was on a table in a 1st floor room about 1 meter above. So I moved it across the room, after adding an extra 240VAC outlet for it.

Now I can get that oldies station on 1250, WMTR. At the dial positions of 2NC and 4AK. With much reduced RFI hash


 
 Return to top of page · Post #: 2 · Written at 10:31:44 AM on 16 November 2013.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5401

Whilst there is no guarantee, as RFI especially from what you call Wall Warts (switchmode PSU's is a PIB.

You might want try some caps on the mains and ferrites, like some instruments, on the leads. Some times with transformer sets (which are the dominant species of old tube radios) here. A lot of these had shielded transformers which bleed charge to the chassis. We tend to retrofit these units with a utility grounded cable (3 wire) that grounds the chassis via the mains plug.

I recently had one of the switchmode PSU's in a fax machine cause a whistle in a set with 175kHz IF: That being close to the likely 200kHz of the PSU. It was feeding the signal out using the telephone line as the radiator. Telstra (Phone utility) also had similar in their network caused by a light bulb in a refrigerator? That was reported in the press as well.

Try mains approved (275vac) caps 0.1mfd Line (Active) to Neutral and one cap 0.0047mfd line to ground and another r same neutral to ground.

Marc


 
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