Normally when you change bands with the K3 the P3 will click(relay?) once and
the scope level will drop down a little. Recently I hear the click happen
ever once in awhile just sitting there no band change. Is there something
failing?
73, John N1JM
-
73, John N1JM
K3 #5986
P3 #1752
KPA500
On further investigation it appears to only happen on 40 meters and I
discovered I had the preamp on. Once I turned the preamp off the clicking
seems to have disappeared. If this has something to do with high signal
level, I'm only listening to -110dbm noise.
73, John N1JM
John_N1JM wrote
The relay bypasses the P3's preamp when the signal level starts to
overload the front end. On 40 meters strong SW broadcast signals (that
you can't see on the screen) can cause that to happen.
Alan N1AL
On 03/22/2014 06:04 AM, John_N1JM wrote:
On further investigation it appears to only
John,
Maybe it's -110 dBm average noise, but with -20 dBm static crashes?
Normally you would see these as broad lighter areas on the waterfall,
short duration.
You may also have a noise source that's peaking high, but outside of
the P3's visible span range. If it's anywhere near 40m, the P3
Thanks, Matt. Sounds like a good explanation to me since it seems to go away
with the preamp off.
73,
John N1JM
Matt Zilmer-3 wrote
John,
Maybe it's -110 dBm average noise, but with -20 dBm static crashes?
Normally you would see these as broad lighter areas on the waterfall,
short
Hi
New P3 sn 2xx while listening 20 meters, hear 'clicking' from P3 and
display jumps up/down
from about -120 to -117 and back. intermittent - but more prevalent when
there is a sig
preamp on or off freq 14005 -14031 sigs S5 -9
any ideas?
tnxs 73
John VE3NFK
--
View this message in
John,
The P3 automatically turns off its internal preamp (using a relay)
whenever a strong signal overloads the front end. You might try turning
off the preamp in the K3 or even turning on the attenuator. That's a
good idea anyway when the band is wide open, to keep the K3 nice and
linear.
To all,
Received my P3 last week and love it. Just one small issue. There is a very
soft but noticeable clicking sound when I am using the P3/K3 on the low bands
-- 80 and 160M. The click repeats itself about every 7 or 8 seconds. Sounds
like a relay within the P3. I only hear it on those
It's probably the P3's preamp function switching on and off. The
preamp on/off will follow the signal level, so if you see static
crashes (elevated noise floor), it is possible the preamp will kick
out when they happen.
matt W6NIA
K3 #24
On Mon, 06 Sep 2010 11:36:20 -0500, you wrote:
To all,
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