I have an intermittent problem when receiving and transmitting.
Rx: the received modulation from other stations on 80/40m in LSB sounds like it
is on the
wrong sideband. The RX level seems quite low. Sometimes I have the impression
that the
frequency is not stable, it is like the radio is tuni
Werner,
Look in the BFO and VFO areas.
An problem that corrects itself by tapping is normally caused by a bad
solder connection.
Reflow the soldering (adding a little bit of flux from new solder) with
a hot (400 degC) iron.
73,
Don W3FPR
On 4/8/2012 6:48 AM, Dr. Werner Furlan wrote:
> I have
hi Don,
I treated the region around TP1 with cold spray and had the impression that
the problem appeared there.
I soldered all junctions in this region with the result that the problem is
now permanent, which should make troubleshooting somehow easier.
The symptoms are:
when I listen to a sign
found it!
it was a bare lead of L33, which slightly touched a nearby solder point.
I bent it towards the toroid, as far away from any solder point and now
everything sounds good again.
Thank you Don, you pointed me in the correct direction.
73!
Werner oe9fwv
--
View this message in context:
Werner,
Glad to hear you found it. Have a good week.
73,
Don W3FPR
On 4/8/2012 6:52 PM, oe9fwv wrote:
> found it!
>
> it was a bare lead of L33, which slightly touched a nearby solder point.
> I bent it towards the toroid, as far away from any solder point and now
> everything sounds good again
thank you Don,
When I tested the K2 on all bands, I found there is still a problem left.
output power on 40 and 80m is only 5 or 6 W max.
The power display on the K2 shows up to 15 W, but on my accurate LP100 meter
there is only 6 W out.
Output on 1.8, 10-28 Mhz is normal.
I think this has co
Werner,
Is that with the base K2 (no KAT2, no KPA100 and no KAT100)?
If so, is the K2 operating into a 50 ohm load? With the bare base K2,
the RF detector must see a 50 ohm non-reactive load to have good power
indication.
The KAT2 or KAT100 or KPA100 have real wattmeters which fix that conditi
hi Don,
yes it is with the base K2, and yes I sent into a dummy load.
I'll repeat the test with a better setup (no switch between dummy load and
K2/Wattmeter)
But the fact that only 80 and 40m is affected lets me suspect the issue is with
the K2.
tnx a lot for your support!
Werner oe9fwv
O
I have repeated my output tests with a known good dummy load and cables.
Results are different now.
I have around 10-12W on all bands except 12m - where it is only 5 Watts,
which are also displayed correctly.
Is this normal? I am very rarely activ on 12m maybe this has always been
like this and
Werner,
My suspicion is that it has been like that a long time. You may want to
set the power knob back to about 2 watts, set the band to 12 meters and
then do a TUNE - peak the bandpass filter - trimmers C44 and C46.
After peaking those capacitors, test the maximum output again on 12 meters.
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