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: <Repeater-Builder@yahoogroups.com>
>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: <Repeater-Builder@yahoogroups.com>
> > >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 Repeater-Builder@yahoogroups.com, "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: <Repeater-Builder@yahoogroups.com>
> > > > > 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
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > Yahoo! Groups Links
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> > > >
> > > >
> > > > Yahoo! Groups Links
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> > >
> > >
> > >
> > >Yahoo! Groups Links
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> > Yahoo! Groups Links
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