[Icom] Icom746

Wed, 16 Jul 2003 12:19:18 -0400

The mod to remove the attenuation on the Icom R-70 and R-71 prevented a
relay from actuating.  The relay prevented the radio from going OUT of the
attenuated, pre-amp off state.

When a wire was snipped, the relay no longer functioned - and the preamp
could be turned ON in the broadcast band - and more importantly on 500 kHz
DISTRESS for ships.

This receiver was used on many ships in this way as a reserve (battery)
receiver - and was the BEST receiver ever used for this use!

73

DR
----- Original Message ----- 
From: "Roy Sakabu" <[email protected]>
To: <[email protected]>
Sent: Wednesday, July 16, 2003 12:03 PM
Subject: RE: [Icom] Icom746

> Are you sure it isn't a mod which removes the attenuation in the AM
> broadcast band?
> The conjecture is to bypass R11-14 on the RF board.  Why is is conjecture?
> No one has admitted to trying it out and publicizing the results.  Others
> think there's too much atmospheric noise on MW to make removing the
> attenuation worthwhile.
> Page 10-1 of the service manual shows the built-in attuenuator in the
block
> diagram, page11-5 shows where they are in the schematics.
>
> > -----Original Message-----
> > From: Homer Bruce [SMTP:[email protected]]
> > Sent: Wednesday, July 16, 2003 6:55 AM
> > To: [email protected]
> > Subject: [Icom] Icom746
> >
> > Hello Icomer's
> >
> > My question is, has anyone found a mod for turning on the preamps in the
> > am
> > broadcast band.  I've never seen this question answered on other forums.
> >
> >                                     Homer
> >
> > ----
> > Your Moderator: Dick Flanagan W6OLD, [email protected]
> > Icom Users Net: Sundays, 1700Z, 14.315 MHz
> > Icom FAQ: http://www.qsl.net/icom/
> >
>
>
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> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
>