John:

That is very true, and the problem is that my options for moving the speaker 
to a different location are rather limited.

Will keep trying different things here.

The interesting thing is that I don't get the RFI with any other speaker 
that I've tried to use.

73 from Tom Behler: KB8TYJ

----- Original Message ----- 
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, May 07, 2012 10:11 AM
Subject: Re: Interesting RFI Problem


>I see that with a lot of cheap computer/similar speakers. Sometimes moving
> them away from the equipment helps, sometimes not, sometimes chokes help,
> sometimes nothing helps, it's just one of those things.
> ----- Original Message ----- 
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, May 07, 2012 7:04 AM
> Subject: Interesting RFI Problem
>
>
>> Hi, all.
>>
>> Well, I have an interesting little RFI problem here in the home shack 
>> that
>> I've been scratching my head over lately.
>>
>> At the estate sale I've been talking about, I picked up a Realistic
>> 32-2040
>> amplified speaker.  The speaker either runs on 6 C-cell batteries, or the
>> supplied 9-volt wallwart.
>>
>> The speaker sounds terrific, with excellent quality  audio that I can
>> adjust
>> in terms of tone and volume from the speaker itself.
>>
>> However, when I transmit with my TS590, using my amplifier, I get lots of
>> RFI through the speaker itself.
>>
>> I have tried RF chokes on both the Wallwart power cord, and the phono 
>> plug
>> connection between the Ts590 and the speaker itself, but no joy.
>>
>> I have tried running the speaker just on batteries, but still get the 
>> RFI.
>>
>> Obviously, this particular speaker is more susceptible to RFI than usual,
>> since I don't get the RFI at all when using other speakers such as my
>> Motorola amplified speaker or just a standard external speaker.
>>
>> Does anyone have any suggestions as to what else I might try?
>>
>> I'd love to use the speaker since it sounds so good, but the RFI issue 
>> may
>> make that impractical in the long run.
>>
>> 73 from Tom Behler: KB8TYJ
>