Hi Bill,
...to say nothing of all those 20W PEP military HF manpacks with a whip
antenna plugged into a socket on top of the case. They did not suffer
notably from internal EMC issues. Had any such radio malfunctioned in the
near-field of its own antenna, it would never have got out of acceptance
test.
Cheers for now, 73,
Adam VA7OJ/AB4OJ
-----Original Message-----
From: tentec-bounces@contesting.com
[mailto:tentec-bounces@contesting.com]On Behalf Of Bill Fulling
Sent: Friday, November 14, 2003 15:48
To: Steve Baron - KB3MM; tentec@contesting.com
Subject: Re: [TenTec] Orion and MIKEs
They were probably afraid to design a HT rig because its hard to tell the
user that the "rubber ducky"antenna is too close to the rcvr and maybe you
had best relocate it down the street if you wan't the rig to work.I love T/T
gear,but ever wonder why NO major Dxpedtion has ever used T/T gear even when
it was offered for free?- Original Message -----
From: "Steve Baron - KB3MM" <SteveBaron@StarLinX.com>
To: <tentec@contesting.com>
Sent: Friday, November 14, 2003 6:04 PM
Subject: Re: [TenTec] Orion and MIKEs
> What kind of handheld rig you talking about?
>
> ----- Original Message -----
> From: "Bill Fulling" <w4njf@email.midflorida.com>
> To: <tentec@contesting.com>
> Sent: Friday, November 14, 2003 21:47
> Subject: Re: [TenTec] Orion and MIKEs
>
>
> > Hi Grant,
> > Have got to disagree with on this subject.Another poster noted that the
DC
> > resistance from the shell of the mike jack was abt 6 OHMS and asked to
> > anyone else to try it-the DC reisistance on my Jupiter to the back
chassis
> > ground point reads abt 8 ohms.No way this should occur-if the shell is
NOT
> > grounded to DC potential,all kind of RFI problems will occur;pls do NOT
> say
> > "its an RF in the shack problem,or ur ant is too close to the rig".
> > This why T/T has NEVER built a handheld rig!Its hard to say the antenna
is
> > too close to rig when its a handheld.Why this audio port "floats"above
gnd
> > is a mystery to me also.
> > 73 de Bill W4NJF;A Jupiter owner with the same problem.
> >
> > ----- Original Message -----
> > From: "Grant Youngman" <nq5t@comcast.net>
> > To: <tentec@contesting.com>
> > Sent: Friday, November 14, 2003 11:07 AM
> > Subject: Re: [TenTec] Orion and MIKEs
> >
> >
> > > >
> > > > If you run a new ground wire (I used insulated stranded 18 Ga.) from
> > > > mic pin #2 (ground) to the same board that mic connector goes to and
> > > > then to the rear lug on the rig, this will eliminate the 6 ohms in
the
> > > > audio chain. But not in the IF and RF chain. separate lines will
have
> > > > to be installed to remedy that issue.
> > >
> > > One last comment on this bothersome subject ... no flame intended.
> > >
> > > The other thing you will accomplish by fiddling with this is to create
> > > unwanted ground loops that may cause all manner of problems. The 6
> > > ohms is not an issue. Adding is a few extra ground wires may seem
> > > harmless, but destroying the signal and power ground engineering
that's
> > > in a complex mixed mode analog and digital device is simply not
> > > advisable.
> > >
> > > This begs for enough trouble as far as the audio path is concerned.
In
> > > the RF/IF/digital sections of the radio an extra ground path or two
> could
> > > wreak real havoc.
> > >
> > > I'll go back to my original statement which is that if RF feedback is
a
> > > problem then the way to rectify it is to clean up the RF environment
in
> > the
> > > radio room.
> > >
> > > Grant/NQ5T
> > >
> > > _______________________________________________
> > > TenTec mailing list
> > > TenTec@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/tentec
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|