Trying to get help, one more time...

[Michael L. Hasenfratz Sr.]

        Does anyone (i.e. Elecraft) know the Auxbus protocol? And is the spec
available?

        I beleive, in trying to find out why the 8R voltage is at 6.43v, I blew the
MCU (controller board) AuxBUS output.

        I only see pin 40 drop a few tens of millivolts during a band change
request.

        The IOC starts and stops the clock on power up, no relays change and that's
all the RF board does.

        Info 080 is displayed during powerup and on a band change request.

        That says the IOC or the AuxBUS is in trouble.

        Since I didn't get any response for my last question, I'm hoping this one
is more interesting to the readers.

73's de Mike WA6FXT
// [hidden email]
// [hidden email]



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[wayne burdick]

Mike,

The auxBus protocol is unique to Elecraft. I wrote the code, so I can
answer your questions. Too late tonight, but I'll e-mail you directly
tomorrow.

73,
Wayne
N6KR

On Apr 16, 2005, at 12:36 AM, Michael L. Hasenfratz Sr. wrote:

>
> Does anyone (i.e. Elecraft) know the Auxbus protocol?....

---

http://www.elecraft.com

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[Don Wilhelm-3]

Michael,

An 8R voltage of 6.43 volts is an indication of something wrong there - it
should be about 7.5 volts, no lower than 7.35 volts.

Have you checked the input voltage (emitter) to Control Board Q2? (should be
8 volts unless the regulator output is low) and the base voltage (should be
about 0.7 volts below the emitter voltage) - if both those conditions are
true, the trnasistor should be conducting properly.  Is the voltage at the
drain of Q4 close to zero volts?  If not, Q4 is not conducting properly -
check the gate, it should be at least 4 volts (normally almost 5 volts).
You may have something drawing too much current from the 8R line or Q2 or Q4
may be bad.

73,
Don W3FPR

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of Michael L.
> Hasenfratz Sr.
> Sent: Saturday, April 16, 2005 3:37 AM
> To: [hidden email]
> Subject: [Elecraft] Trying to get help, one more time...
>
>
>
> Does anyone (i.e. Elecraft) know the Auxbus protocol? And
> is the spec
> available?
>
> I beleive, in trying to find out why the 8R voltage is at
> 6.43v, I blew the
> MCU (controller board) AuxBUS output.
>
> I only see pin 40 drop a few tens of millivolts during a band change
> request.
>
> The IOC starts and stops the clock on power up, no relays
> change and that's
> all the RF board does.
>
> Info 080 is displayed during powerup and on a band change request.
>
> That says the IOC or the AuxBUS is in trouble.
>
> Since I didn't get any response for my last question, I'm
> hoping this one
> is more interesting to the readers.
>
> 73's de Mike WA6FXT
> // [hidden email]
> // [hidden email]
>
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>

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