Wow, fast reply Jeff.....
Yes , I tried re-config several times, upside down and sideways
and still nothing shows at D-out. So pretty sure the MOSFET is done for. I
am pretty sure I have config correct. 02 address 01 for on ? Tnx
Jeff and again, WOW what a fast response. If it gets any quicker I will
have to get a fire extinguisher to put out the fire. 73 Jay
----- Original Message -----
From: "Jeff Otterson" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, March 01, 2005 10:34 PM
Subject: Re: [Repeater-Builder] Re: M2 CAS
>
> Hi,
> You should make sure you did not configure the fan control off.
>
> The PIC microcontrollers are very robust. It is possible the fan
> control MOSFET got blown up, but they are also very robust. So check the
> software first. My first guess would be a configuration problem.
>
>
> Regards,
>
> Jeff
>
>
> At 10:28 PM 3/1/2005, you wrote:
>
> >Hi Jeff,
> >
> > I found the problem. Had the chassis of both rx and tx trays tied
> >together, guess I forgot they were isolated from ground. It seems it is
the
> >smallest things you overlook that cause the biggest anount of grief. Tied
> >both A- together and the NHRC/M2 is working as required and all control
> >tones doing fine, but, I seem to have lost the digital control for the
fan.
> >I will probably be mailing this into you for repair. I am certain now
that
> >was what the stray voltage took out. Thanks for the help to you and all
> >those on the repeater builders group. Jay
> >----- Original Message -----
> >From: "Jeff Otterson" <[EMAIL PROTECTED]>
> >To: <[email protected]>
> >Sent: Friday, February 18, 2005 6:32 AM
> >Subject: Re: [Repeater-Builder] Re: M2 CAS
> >
> >
> > >
> > > Hello Jay,
> > >
> > > The NHRC-4/M2 should work fine in your radio, as long as the proper
> > > modifications are made to the systems board. The CAS line is buffered
> >with
> > > a transistor in the controller already.
> > >
> > > You might want to check that there are no other jumpers or
> >modifications
> > > made to the systems board on the radio that could be causing you this
> >grief.
> > >
> > > We have sold hundreds of those controllers; the problem you are
> > > experiencing is not typical. Something else is wrong.
> > >
> > > Regards,
> > >
> > > Jeff Otterson, N1KDO
> > > NHRC LLC
> > >
> > >
> > > At 11:32 PM 2/17/2005, you wrote:
> > >
> > > >Hi Coy,
> > > > I have a lot of different info now on trying to get a cos
signal
> >to
> > > >my nhrc4/m2 controller. Can you give me the schematic for using the
> >2n2222
> > > >transistor to buffer the cas line. Any and all suggestions will be
used.
> > > >Incidentally, the A- lines were not tied together, I had the TX on a
> >20amp
> > > >power supply and the receiver on a deep cycle battery .....so no A-
were
> > > >tied together.
> > > >
> > > > I will try all ideas and want to thank everyone on this list
for
> > > >their suggestions. I will report back on what works for me. Thanks
> >again.
> > > >Jay
> > > >----- Original Message -----
> > > >From: "Coy Hilton" <[EMAIL PROTECTED]>
> > > >To: <[email protected]>
> > > >Sent: Thursday, February 17, 2005 11:04 PM
> > > >Subject: [Repeater-Builder] Re: M2 CAS
> > > >
> > > >
> > > > >
> > > > >
> > > > > If the A- are tied togeather then that's not the problem. I use
the
> > > > > NHRC2 controller. The CAS doesn't like to source current. I always
> > > > > use a 2N2222 or a NPN transistor and a 10k resistor connected to
the
> > > > > CAS line to buffer it and it doesn't load down the CAS line.
> > > > > I hope this helps.
> > > > > AC0Y
> > > > >
> > > > > --- In [email protected], "Jay" <[EMAIL PROTECTED]>
> > > > > wrote:
> > > > > > Why didnt I think of that....knowing the ground is isolated...I
> > > > > have been
> > > > > > tying the chassis together instead of the A-.. what was I
> > > > > thinking..Hmmm !
> > > > > > I will give it a try Bob... I am @ work @ firehouse right now
but
> > > > > am anxious
> > > > > > to get home and check that out. Even if that doesnt cure the
> > > > > problem , it
> > > > > > makes things the way they should be, ground wise that is. Tnx
> > > > > again Jay
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Bob Dengler" <[EMAIL PROTECTED]>
> > > > > > To: <[email protected]>
> > > > > > Sent: Thursday, February 17, 2005 4:00 PM
> > > > > > Subject: Re: [Repeater-Builder] M2 CAS
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > At 2/17/2005 11:55 AM, you wrote:
> > > > > > >
> > > > > > > >Thanks for the info Bob,
> > > > > > > >
> > > > > > > > I may try the high side inject...sure
couldnt
> > > > > hurt, it
> > > > > > > >would be much nicer to have one compact package than 2... as
> > > > > far as using
> > > > > > > >the RUS... that didnt work either... not even enough voltage
to
> > > > > fire up
> > > > > > the
> > > > > > > >controller... I may well have a controller problem with the
> > > > > NHRC /M2.
> > > > > > >
> > > > > > > Seems like the ground between the external Mastr II & NHRC
> > > > > controller
> > > > > > isn't
> > > > > > > good. Make sure the A- lines of both Mastr IIs are tied
> > > > > together (not
> > > > > > just
> > > > > > > the chassis, which is DC isolated) before giving up on the
> > > > > separate Mastr
> > > > > > > II RX.
> > > > > > >
> > > > > > > Bob NO6B
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
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