David,
Welcome to the world of Elecraft.
Do stay around - no harm done. If you are using Nabble to respond, know
that those of us on the official Elecraft reflector see only what you
wrote and none of what you are referring to - unless you copy a bit of
it in your post. Nabble is not mainta
Sorry Don, I'm new to the the Reflector, and didn't mean to create a problem.
I figured since I was replying to a particular thread, it would all make
sense. I guess I was wrong. So hopefully, here is some reference material.
If I screw it up this time, just ignore everything, and I'll go away
e
What post? Your post makes no sense without a bit of reference material.
Sorry, but I subscribe to the Elecraft reflector and do not have time
for threaded conversations that might appear on nabble.
Please copy a bit of your referenced text in the future.
73,
Don W3FPR
On 7/13/2014 10:46 PM,
Wow, I'm glad I found this post. I just completed building the control board
for my K2, and found the resistance on U6 pins 29 and 30 to be 96.4K. I
didn't really think it was an issue, but it is always nice to have someone
else confirm it. All other resistance checks were within specs.
Thanks
Those should be good, Ed. When trying to measure resistance in a circuit
containing semiconductor junctions, DMMs voltage can sometimes alter
readings a bit. You are within 10%.
Many DMMs give no reading at all when seeing an open circuit. What does you
DMM do in resistance scale with the leads no
Ed,
The first two readings are very likely OK, you might re-check by
reversing the leads or putting new batteries in your DMM. The other
possibility is that you are using auto-ranging, and the reading may be a
bit different if you switch to the first fixed range greater than 90k
I don't kno
Hi Paul WN2K,
What I propose you do is:
1) Set the return/ground/neutral lead - typically the black lead - of
your multimeter, to one of the grounding terminals that you soldered
into the control board using a piece of component lead. The easiest way
for you to do this is to use an alligator c
Paul,
Yes, you would connect one lead (usually the black one) of your DMM to
ground.
If by "no reading" you mean infinite resistance (the same thing the
meter displays when the leads are not touching anything), then those two
readings are correct.
The other "problem" I see is the measuremen
Paul,
Yes, those are OK. They are the DOT and DASH lines to the
microprocessor and have nothing else but U6 on the Control Board to
bring the resistance down.
In general, a 10% deviation from the values listed in the manual are
close enough.
73,
Don W3FPR
Paul Huff wrote:
> Hi everybody,
>
If you get strange readings after reversing the leads try reading the
resistance on pin 21 (8R) and pin 23 (8T) of P2 Look at Appendix B "Control
Board." even the best of us occasionally mistake the pin out on
transistors.
Rich,
KE0X
Chuck,
Try reversing your DMM probes - it is possible that n
Chuck,
Try reversing your DMM probes - it is possible that no real problem exists.
(the 8T and 8R lines are not used on the Control Board, so the resistance
checks should indicate only that nothing is shorted - the fact that you show
similar reading on both lines - and both show some resistanc
Jeff,
The reading is a wee bit on the low side, BUT...
The proper answer depends on your DMM. First try reversing the probes, and
try another DMM if you can obtain one (beg or borrow).
Bottom line - know your test instruments and their limitations - only then
can you know whether a problem e
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