[Icom] One big punch from W4RT

Fri, 15 Nov 2002 11:45:16 -0500

Yes that was very helpful Johnny. Thanks. A drawback for me on the W4RT mic
is that it appears to not have up and down buttons which is a must for me in
the mobile.
ED YEARY W4TEY
325 CUMBERLAND DRIVE
HARROGATE, TN. 37752-6942

----- Original Message -----
From: "Siu Johnny" <[email protected]>
To: <[email protected]>
Sent: Friday, November 15, 2002 1:53 AM
Subject: Re: [Icom] One big punch from W4RT

> Hi Group,
>
> IC706 (especially the very first version) is well-known for not enough mic
> gain and compression gain.  There are ways to improve the mic audio given
> in the www.icomamerica.com  trouble shooting web page.
>
> One of the way is to modify the R236 to a higher value of 68-82k inside
the
> IC706.  However, this excerise is fairly complicated for non-professional
> because it involves SMT work at the reverse side of the main unit PCB.
>
> I ordered an One big punch from W4RT for my FT817 so that I took the
chance
> to order one for my HM 103 as well.
>
> The One big punch did give HM103 + IC706 more punch.  However, the
> compression gain of OBP itself is not that high so that I have to turn on
> the internal compressor of IC706 as well.  By setting the mic gain at 4-5
> (previously 8-10 without the OBP), I can achieve very good DX audio report
> (compressor is not supposed to be Hi-Fi for local chats).
>
> With some experiments and audio report exchanges with DX stations in 6
> metre, the installation of OBP does give more talk power.  My current
> setting with IC706 (original version) is:  IC706 mic gain at 4 and
internal
> compression gain at about 2 o'clock.
>
> Of course, you have to bear some audio colouration in FM mode because the
> OBP inside the HM103 is always on.  Audio report for local 2 metre FM
> operation is OK and acceptable with no notable adverse effect.
>
> As I often QRV with IC706 on 6 metre DX, I find OBP is a worthwhile
> accessory.  However, if you are only interested in local FM chats, you can
> simply forget it.
>
> OBP is a must accessory for FT817 because the rig does not have a speech
> compressor.  If I give a 5 for FT817, I shall give a 4 for IC706.
>
> Hope I have given you some thoughts.
>
>
> 73
>
>
> Johnny VR2XMC
>
>
>
>
>
>
> From: "Ed" <[email protected]>
> Reply-To: [email protected]
> To: <[email protected]>
> Subject: [Icom] One big punch from W4RT
> Date: Thu, 14 Nov 2002 23:52:35 -0500
>
> Anyone have any experience with the One big punch mod for the HM 103 hand
> mic or the One big punch mic sold by W4RT? Any impressions or feedback
> would be appreciated.
>
> ED YEARY W4TEY
> 325 CUMBERLAND DRIVE
> HARROGATE, TN. 37752-6942
>
>
>
>
>
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