A Audio and hi-fi forum. AudioBanter

Go Back   Home » AudioBanter forum » rec.audio » Tech
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Amp picking up radio



 
 
Thread Tools Display Modes
  #1  
Old October 30th 10, 07:50 PM posted to rec.audio.tech
Greg Forschler
external usenet poster
 
Posts: 4
Default Amp picking up radio

I just bought a new little Laney amp for home, it buzzes less than my
last small amp, but seems to pick up radio signals much more, even
when there is no cable plugged in (and when there is a cable I use
Mogami cables that really do help alot). I've switched outlets, moved
it around, nothing really helps. There is no ground switch either. I
do notice that when I touch the amp, and especially hold the power
cord, it eliminates most of it. So I'm wondering, is there something I
can get, besides a human body, to touch or 'hold' the cord, something
to wrap around it or something that will do the same thing as when a
human hand touches it?
Ads
  #2  
Old October 31st 10, 09:55 PM posted to rec.audio.tech
Greg Forschler
external usenet poster
 
Posts: 4
Default Amp picking up radio

>
> Have you checked the power lead for earth continuity?
>
> Have you checked your mains sockets for earth?
>


I don't know what either of these means.



  #3  
Old October 31st 10, 11:01 PM posted to rec.audio.tech
dave a
external usenet poster
 
Posts: 21
Default Amp picking up radio

On 10/31/2010 1:55 PM, Greg Forschler wrote:
>>
>> Have you checked the power lead for earth continuity?
>>
>> Have you checked your mains sockets for earth?
>>

>
> I don't know what either of these means.
>


1. Does your power outlet have three holes and your power cord three
wires and prongs?

2. Make sure the round prong on the cord is connected to the ground on
the unit. This requires a simple continuity tester or an ohm meter
connected between the round prong and the chassis of the unit. The unit
needs to be unplugged when you conduct this test.

3. Is the round hole on the power outlet connected to earth ground?
This can be tested in a similar fashion, but will require you know where
to find a good earth ground.

4. If both of these tests are good, then your unit is well grounded and
this is not the problem.

5. If you are using a two wire cord or a two hole outlet, you likely
have a ground loop and this is causing your problem. You MUST have good
grounding.

  #4  
Old November 2nd 10, 09:20 PM posted to rec.audio.tech
gs
external usenet poster
 
Posts: 12
Default Amp picking up radio

In article >, Greg Forschler > wrote:
>I just bought a new little Laney amp for home, it buzzes less than my
>last small amp, but seems to pick up radio signals much more, even
>when there is no cable plugged in (and when there is a cable I use
>Mogami cables that really do help alot). I've switched outlets, moved
>it around, nothing really helps. There is no ground switch either. I
>do notice that when I touch the amp, and especially hold the power
>cord, it eliminates most of it. So I'm wondering, is there something I
>can get, besides a human body, to touch or 'hold' the cord, something
>to wrap around it or something that will do the same thing as when a
>human hand touches it?


Whats a Laney amp ??

Usually any connect can make a difference, at the speaker, the power cord, or
inputs, or any other connection. RF filters, RF chokes, grounding, etc to fix.

greg
  #5  
Old November 17th 10, 10:19 PM posted to rec.audio.tech
Greg Forschler
external usenet poster
 
Posts: 4
Default Amp picking up radio

On Nov 2, 12:20*pm, (GS) wrote:
> In article >, Greg Forschler > wrote:
>
> >I just bought a new little Laney amp for home, it buzzes less than my
> >last small amp, but seems to pick up radio signals much more, even
> >when there is no cable plugged in (and when there is a cable I use
> >Mogami cables that really do help alot). I've switched outlets, moved
> >it around, nothing really helps. There is no ground switch either. I
> >do notice that when I touch the amp, and especially hold the power
> >cord, it eliminates most of it. So I'm wondering, is there something I
> >can get, besides a human body, to touch or 'hold' the cord, something
> >to wrap around it or something that will do the same thing as when a
> >human hand touches it?

>
> Whats a Laney amp ??
>
> Usually any connect can make a difference, at the speaker, the power cord, or
> inputs, or any other connection. RF filters, RF chokes, grounding, etc to fix.
>
> greg


Laney is the brand, popular in the UK I guess.

I'm not sure what an RF filter or choke is. I'm not an electrician.
The power cable does have the third prong for ground. I tried
something called a ferite noise surpressor, with no change.
I had a smaller lower quality amp before, still have it actually, it
didn't pick up the radio so much but buzzed really bad. I almost think
the new amp is just doing a better job acting as a true radio, where
as the first one just picked up all the signals and didn't filter the
frequencies out so it was just static. I'm not sure which is worse.
  #6  
Old November 18th 10, 03:11 PM posted to rec.audio.tech
gs
external usenet poster
 
Posts: 12
Default Amp picking up radio

In article >, Greg Forschler > wrote:
>On Nov 2, 12:20=A0pm, (GS) wrote:
>> In article =

>..com>, Greg Forschler > wrote:
>>
>> >I just bought a new little Laney amp for home, it buzzes less than my
>> >last small amp, but seems to pick up radio signals much more, even
>> >when there is no cable plugged in (and when there is a cable I use
>> >Mogami cables that really do help alot). I've switched outlets, moved
>> >it around, nothing really helps. There is no ground switch either. I
>> >do notice that when I touch the amp, and especially hold the power
>> >cord, it eliminates most of it. So I'm wondering, is there something I
>> >can get, besides a human body, to touch or 'hold' the cord, something
>> >to wrap around it or something that will do the same thing as when a
>> >human hand touches it?

>>
>> Whats a Laney amp ??
>>
>> Usually any connect can make a difference, at the speaker, the power cord=

>, or
>> inputs, or any other connection. RF filters, RF chokes, grounding, etc to=

> fix.
>>
>> greg

>
>Laney is the brand, popular in the UK I guess.
>
>I'm not sure what an RF filter or choke is. I'm not an electrician.
>The power cable does have the third prong for ground. I tried
>something called a ferite noise surpressor, with no change.
>I had a smaller lower quality amp before, still have it actually, it
>didn't pick up the radio so much but buzzed really bad. I almost think
>the new amp is just doing a better job acting as a true radio, where
>as the first one just picked up all the signals and didn't filter the
>frequencies out so it was just static. I'm not sure which is worse.


Not very normal to pick up radio STATIONS, usually its maybe one AM station.
Something may be wrong with the amp. A filter box on the power cord
side might help. Not sure where you tried a ferrite noise surpressor.
Filtering the speaker leads is sometimes required on long speaker cables,
but that should not be your problem.

greg
  #7  
Old November 19th 10, 11:47 PM posted to rec.audio.tech
Greg Forschler
external usenet poster
 
Posts: 4
Default Amp picking up radio

On Nov 18, 6:11*am, (GS) wrote:
> In article >, Greg Forschler > wrote:
>
>
>
>
>
> >On Nov 2, 12:20=A0pm, (GS) wrote:
> >> In article =

> >..com>, Greg Forschler > wrote:

>
> >> >I just bought a new little Laney amp for home, it buzzes less than my
> >> >last small amp, but seems to pick up radio signals much more, even
> >> >when there is no cable plugged in (and when there is a cable I use
> >> >Mogami cables that really do help alot). I've switched outlets, moved
> >> >it around, nothing really helps. There is no ground switch either. I
> >> >do notice that when I touch the amp, and especially hold the power
> >> >cord, it eliminates most of it. So I'm wondering, is there something I
> >> >can get, besides a human body, to touch or 'hold' the cord, something
> >> >to wrap around it or something that will do the same thing as when a
> >> >human hand touches it?

>
> >> Whats a Laney amp ??

>
> >> Usually any connect can make a difference, at the speaker, the power cord=

> >, or
> >> inputs, or any other connection. RF filters, RF chokes, grounding, etc to=

> > fix.

>
> >> greg

>
> >Laney is the brand, popular in the UK I guess.

>
> >I'm not sure what an RF filter or choke is. I'm not an electrician.
> >The power cable does have the third prong for ground. I tried
> >something called a ferite noise surpressor, with no change.
> >I had a smaller lower quality amp before, still have it actually, it
> >didn't pick up the radio so much but buzzed really bad. I almost think
> >the new amp is just doing a better job acting as a true radio, where
> >as the first one just picked up all the signals and didn't filter the
> >frequencies out so it was just static. I'm not sure which is worse.

>
> Not very normal to pick up radio STATIONS, usually its maybe one AM station.
> Something may be wrong with the amp. A filter box on the power cord
> side might help. Not sure where you tried a ferrite noise surpressor.
> Filtering the speaker leads is sometimes required on long speaker cables,
> but that should not be your problem.
>
> greg- Hide quoted text -
>
> - Show quoted text -


By filter box, do you mean like the noise surpressor outlets that sit
between the power cable and the regular outlet?
  #8  
Old November 22nd 10, 02:43 PM posted to rec.audio.tech
gs
external usenet poster
 
Posts: 12
Default Amp picking up radio

In article >, Greg Forschler > wrote:
>On Nov 18, 6:11=A0am, (GS) wrote:
>> In article .=

>com>, Greg Forschler > wrote:
>>
>>
>>
>>
>>
>> >On Nov 2, 12:20=3DA0pm, (GS) wrote:
>> >> In article =

>ups=3D
>> >..com>, Greg Forschler > wrote:

>>
>> >> >I just bought a new little Laney amp for home, it buzzes less than my
>> >> >last small amp, but seems to pick up radio signals much more, even
>> >> >when there is no cable plugged in (and when there is a cable I use
>> >> >Mogami cables that really do help alot). I've switched outlets, moved
>> >> >it around, nothing really helps. There is no ground switch either. I
>> >> >do notice that when I touch the amp, and especially hold the power
>> >> >cord, it eliminates most of it. So I'm wondering, is there something =

>I
>> >> >can get, besides a human body, to touch or 'hold' the cord, something
>> >> >to wrap around it or something that will do the same thing as when a
>> >> >human hand touches it?

>>
>> >> Whats a Laney amp ??

>>
>> >> Usually any connect can make a difference, at the speaker, the power c=

>ord=3D
>> >, or
>> >> inputs, or any other connection. RF filters, RF chokes, grounding, etc=

> to=3D
>> > fix.

>>
>> >> greg

>>
>> >Laney is the brand, popular in the UK I guess.

>>
>> >I'm not sure what an RF filter or choke is. I'm not an electrician.
>> >The power cable does have the third prong for ground. I tried
>> >something called a ferite noise surpressor, with no change.
>> >I had a smaller lower quality amp before, still have it actually, it
>> >didn't pick up the radio so much but buzzed really bad. I almost think
>> >the new amp is just doing a better job acting as a true radio, where
>> >as the first one just picked up all the signals and didn't filter the
>> >frequencies out so it was just static. I'm not sure which is worse.

>>
>> Not very normal to pick up radio STATIONS, usually its maybe one AM stati=

>on.
>> Something may be wrong with the amp. A filter box on the power cord
>> side might help. Not sure where you tried a ferrite noise surpressor.
>> Filtering the speaker leads is sometimes required on long speaker cables,
>> but that should not be your problem.
>>
>> greg- Hide quoted text -
>>
>> - Show quoted text -

>
>By filter box, do you mean like the noise surpressor outlets that sit
>between the power cable and the regular outlet?


Right. It should an LC filter.

greg
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to resolve XLR picking up radio stations Ludwig77 Pro Audio 9 December 6th 07 07:39 PM
Ribbon Mic picking up Radio Frequency Interference Truth Pro Audio 502 October 16th 07 07:47 PM
IR wireless h'phones picking up radio station!? andrew_h Tech 0 March 17th 06 01:38 PM
Need help in picking the right app. tj_one Pro Audio 10 September 24th 05 10:10 PM
little help with picking out an amp.. [email protected] Car Audio 33 March 27th 05 05:52 AM


All times are GMT +1. The time now is 06:33 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 AudioBanter.
The comments are property of their posters.