[Icom] Seeking better audio from my IC-746

Fri, 6 Dec 2002 22:28:32 -0600

Johnny, you mention an SP-20 - my external speaker is an SP-21. Does ICOM
sell more than one type of external speaker? I must have purchased the
cheap/useless model.

73,

Rick

-----Original Message-----
From: Siu Johnny [mailto:[email protected]]
Sent: Wednesday, December 04, 2002 2:55 PM
To: [email protected]
Subject: Re: [Icom] Seeking better audio from my IC-746

An external  speaker will be certainly better.  I am using the ICOM SP-20
which is very good indeed.  However, I feel the SP-20 is very pricy so that
you may wish to shop around the market.  Any set-up with 5 inch diameter
speaker will be fine but you have to pay attention to the frequency response
and RF shielding arrangement.  The use of toriod as RF choke along the
speaker input cable could be a way to avoid RF feed to the speaker.

With respect to the speaker inside the rig, I did in the past replace it
with a better quality mid-range speaker. Clearly, you have to get one with
matched size.  The result of the modification is good for my IC756.

73

Johnny VR2XMC

----- Original Message -----
From: "Bruce D. McLaughlin" <[email protected]>
To: <[email protected]>
Sent: Thursday, December 05, 2002 5:48 AM
Subject: RE: [Icom] Seeking better audio from my IC-746

> I use an RCA speaker I purchased for about $20.00 from Radio Shack.  It
> has a tweeter and woofer and is in a decent enclosure.  It works very
> well with my 765.  That rig, by the way, does have a tone control.  I
> think a decent auxiliary speaker in that class might well be worth a
> look.
>
> I think you might achieve some change in tone by playing with the IF
> shift to either emphasize the high or low frequencies.  Of course there
> are limits as to how far you can go with that before you begin to have
> an adverse impact on signal sensitivity and the signal to noise ratio.
>
> Bruce - W8FU

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