K160RX (Long)

[KR4OW]

Hello All
I am posting this again.
I have a problem with "HI CUR" On the K160RX
It comes on for a second and then shows .5 watts
regardless of the power setting.
In troubleshooting here is what I have done
I compared in and out of the of the module
with the setup of
Power 1.0 watts setting
I got this with the RF Probe
AT C1 7.5-8.3v
AT L1/C2 9.9-10.3v
At L2/C3 7.5-8.3v
I compared this to 80m
and the results were the same
So The next thing I did was check switching My
switching is ok all the relays are functioning
Next
I pulled the K160RX board out and checked to see if
there may be short across the bottom of the plug for
the module. by comparing the reading from 1 pin to the
rest and so on IE pin 1 to pin 2 pin 3 etc then move
to the next pin I have a descrepency that I cannot
prove or disprove Pin 2 to pin 7,8,9 (input) and
12,13,14 all check short. If I read the schematic
correctly There should not be any direct connection
from pin 2 to 7,8,9 12,13,14 which really puts all
these connections to ground, Correct?
thanks
David KR4OW



               
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[Don Wilhelm-3]

David,

To repeat the old adage - check soldering, then re-check soldering, and when
that is done, check the soldering.

In particular, look for too much solder causing solder bridges.

Plug the K160RX into the K2 and select any band other than 160 meters - then
power off and check the resistance from pins 2, 5 and 6, and 12, 13 and 14
to ground again - the reading should be high, if it is not, check for those
solder bridges at the connector and at the relays.  After that, plug the
module in, turn power on and select 160 meters then turn power off - you
should now see continuity through the low pass filter - put one lead on
either of pins 2, 5 or 6 and check continuity to pins 12, 13 and 14 - if the
continuity readings show low resistance, the toroids should be well tinned
and soldered - then check to be certain there is a high resistance to ground
from these pins - if you find a low resistance, look for solder bridges at
each of the capacitors and at the toroid leads.

Hope yo find it without much frustration.

73,
Don W3FPR

----- Original Message -----

> I am posting this again.
> I have a problem with "HI CUR" On the K160RX
> It comes on for a second and then shows .5 watts
> regardless of the power setting.
> In troubleshooting here is what I have done
> I compared in and out of the of the module
> with the setup of
> Power 1.0 watts setting
> I got this with the RF Probe
> AT C1 7.5-8.3v
> AT L1/C2 9.9-10.3v
> At L2/C3 7.5-8.3v
> I compared this to 80m
> and the results were the same
> So The next thing I did was check switching My
> switching is ok all the relays are functioning
> Next
> I pulled the K160RX board out and checked to see if
> there may be short across the bottom of the plug for
> the module. by comparing the reading from 1 pin to the
> rest and so on IE pin 1 to pin 2 pin 3 etc then move
> to the next pin I have a descrepency that I cannot
> prove or disprove Pin 2 to pin 7,8,9 (input) and
> 12,13,14 all check short. If I read the schematic
> correctly There should not be any direct connection
> from pin 2 to 7,8,9 12,13,14 which really puts all
> these connections to ground, Correct?
> thanks

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