Another newbie question, Control Board checks

[Jeff Kinzli]

So I just finished the control board, and went through the resistance checks.

My measurements for U6 pins 29 and 30 both read infinite (or very,
very large resistance, basically my VOM is in out of range). They're
supposed to be 70-90k.

I've been extremely careful with U6, always have my static wrist strap
on, etc. All the other resistance checks are ok. I know there's not
much connected to 29 and 30. I've also reversed my VOM leads, same
difference.

Should I worry about this one, or is that somewhat normal? Reading the
backissues of the reflector I see others that have gotten values in
range, so it makes me think something's bogus.

Ideas? Where to start looking?

Thanks for any ideas...

-J
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[Jeff Kinzli]

Sorry, I should have noted, this is a K2, #5945.

On 1/11/07, Jeff Kinzli <[hidden email]> wrote:

> So I just finished the control board, and went through the resistance checks.
>
> My measurements for U6 pins 29 and 30 both read infinite (or very,
> very large resistance, basically my VOM is in out of range). They're
> supposed to be 70-90k.
>
> I've been extremely careful with U6, always have my static wrist strap
> on, etc. All the other resistance checks are ok. I know there's not
> much connected to 29 and 30. I've also reversed my VOM leads, same
> difference.
>
> Should I worry about this one, or is that somewhat normal? Reading the
> backissues of the reflector I see others that have gotten values in
> range, so it makes me think something's bogus.
>
> Ideas? Where to start looking?
>
> Thanks for any ideas...
>
> -J
>

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[Don Wilhelm-3]

Jeff,

First thing to check is your DMM.  If it is in Auto-range, it may produce
'strange' readings for you under some conditions - switch it to manual
ranging and set the range for something above 100k, then try again.

If you still have extremely high resistance at those pins, check the
soldering at RP4 and the U6 pins.

73,
Don W3FPR

> -----Original Message-----
> On 1/11/07, Jeff Kinzli <[hidden email]> wrote:
> > So I just finished the control board, and went through the
> resistance checks.
> >
> > My measurements for U6 pins 29 and 30 both read infinite (or very,
> > very large resistance, basically my VOM is in out of range). They're
> > supposed to be 70-90k.
> >
> > I've been extremely careful with U6, always have my static wrist strap
> > on, etc. All the other resistance checks are ok. I know there's not
> > much connected to 29 and 30. I've also reversed my VOM leads, same
> > difference.
> >
> > Should I worry about this one, or is that somewhat normal? Reading the
> > backissues of the reflector I see others that have gotten values in
> > range, so it makes me think something's bogus.
> >
> > Ideas? Where to start looking?
>

--
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2:52 PM

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[Jeff Kinzli]

Thanks guys, it was an operator error :)

-J

On 1/11/07, Charles Pitts <[hidden email]> wrote:

> Jeff,
>
> 1.  Double check and make sure that no pins on CNTL-U6 are bent under or are
> outside of the socket.
>
> 2.  Check to see if CNTL-RP4 is installed correctly and all pins soldered.
>
> 73, Charles N3EJS
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Jeff Kinzli
> Sent: Thursday, January 11, 2007 7:03 PM
> To: [hidden email]
> Subject: [Elecraft] Another newbie question, Control Board checks
>
> So I just finished the control board, and went through the resistance
> checks.
>
> My measurements for U6 pins 29 and 30 both read infinite (or very,
> very large resistance, basically my VOM is in out of range). They're
> supposed to be 70-90k.
>
> I've been extremely careful with U6, always have my static wrist strap
> on, etc. All the other resistance checks are ok. I know there's not
> much connected to 29 and 30. I've also reversed my VOM leads, same
> difference.
>
> Should I worry about this one, or is that somewhat normal? Reading the
> backissues of the reflector I see others that have gotten values in
> range, so it makes me think something's bogus.
>
> Ideas? Where to start looking?
>
> Thanks for any ideas...
>
> -J
> _______________________________________________
> 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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