[Elecraft] Spurious

David Cutter d.cutter at ntlworld.com
Tue Dec 22 14:23:59 EST 2009


Jim

I know of a military amplified loudspeaker which *should not* suffer from 
RFI, since it passed the required emc specs for land vehicles.  They're 
nothing like $3000, but certainly not really for amateur budgets.  Starting 
with a metal enclosure helps a lot.  I have a few rejects if anyone is 
interested - off list.

David
G3UNA



----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, December 22, 2009 6:30 PM
Subject: Re: [Elecraft] Spurious


> On Tue, 22 Dec 2009 11:20:48 -0600, Tom Hammond wrote:
>
>>I personally prefer UNamplified Motorola Mobile speakers, available
>>regularly on EBay for $10 or less.
>
> Yes
>
>>The AMPLIFIED Motorola speakers are also good, but require external
>>power.
>
> I haven't seen any of these. BUT -- be VERY cautious with amplified
> speakers. In my short life (68 years), I've seen a LOT of amplified
> speakers, and I've only seen one that didn't suffer from RFI. It cost
> $3K.
>
> 73,
>
> Jim K9YC
>
>
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