LinkedIn
Giulio Pico requested to add you as a connection on LinkedIn:
--
I'd like to add you to my professional network on LinkedIn.
Accept invitation from Giulio Pico
http://www.linkedin.com/e/sn8jl7-gnsnup4q-1p
IMHO an external sequencer is still the best way to have a foolproof
system. Running QRO with a mast mounted lna isn't a good idea if you
don't have one. 20 ms is not enough for sure, as most of the QRO coax
relays have a switching time of that amount or even more
My sequence timing is
Yesterday I paid a visit to a firnd, Giancarlo I3GKK, who was very
worried about an accident happened 3 days ago.
Suddenly, during a brief tx period (10 seconds) at 100 W into a Windom
antenna, he saw smoke coming out from the top panel of his K3.
Since then no power out on all bands (measured
I'm not so sure about this, at least for the holes.
My old XV144 have them since it came out of the factory...,
Maybe it is a simple packing mistake.
Try ask to elecraft support, maybe they can clear it out.
73 de Giulio IW3HVB
No need to drill the holes or get a fan for any of the other XV
I totally agree with this.
I've too noticed when running the XV144 at more than 10/15 W the xverter
case get pretty hot.
The Elecraft guys btw are well known to be conservative about component
choice, keeping well within the safe limits.
On the other hand, just to keep things less hot I'vee
It isn't exactly true that NF is unimportant on tropo otherwise no
one would be using a mast mounted preamplifier.
The main issue then is preserving the dynamic range, as you pointed out
On the XV144 module is mandatory to remove the second rx stage to do
that in this case.
The point
I had the same problem, with a quite noisy shack, the 8877 I use on 144
MHz have a pretty big fan, plus I have other fans on the PC, on the
Network rack and so on.
I solved the problem using a carefully selected microphone.
I chose a SM-57 instrument pickup microphone, from Shure.
The choice
I'll be in Maldives from may 26th to june 04th
I will bring my K3/100 with me with a multiband vertical antenna.
Will be on the air as 8Q7GP and hope to work some of you guys.
I plan to work mainly 20 and 40 meters, but I will keep an eye to the
other bands too if the propagation will assist
Don Wilhelm wrote:
Giulio,
Can you please describe the distortion? Also, please say whether the
distortion is heard in the sidetone or on a different monitoring
receiver.
Does all this happen when operating into a dummy load? Or is it only
when operating into an antenna?
Is this
Don Wilhelm wrote:
Giulio,
Do you have anything with a transformer near the K2? Move the K2 at
least a meter away from anything with a transformer and try it again.
If moving it cures the problem, you may either move the device(s) with
transformers or install the VCO Shield Kit in your
I have a problem with a K2 who behaves strangely on cw. The note is very
bad, full of distorsions (rf?) but the Tuning continuous carrier is
crisp and clean.
I don't know if the two are related (I suspect that :-) ) but tah
would point to the key !?!.
The other odd thing is that on SSB
Don Wilhelm ha scritto:
Giulio,
You did not say what microphones you were trying to use, only that
they were 'dynamic'. Are you attempting to use Pro-Audio
microphones? If so, check out the information provided by Jim Brown
K9YC at http://haminterfacing.pdf/. Do your microphones have
After a few good suggestions by Don, Jim and Fern I run a few more
tests, coming at the conclusion that the problem was not the MIC, or its
interfacing with the K3 or the radio itself.
The audio on HF bands is simply perfect, with or without compression
(and comp acts exactly as it should).
But
Don Wilhelm ha scritto:
Giulio,
Unless the XV144 is operating in a non-linear region, it should not
distort the SSB signal.
Exactly
I tried to redo some calibration of the quiescent current and the
filters to peak the linearity, and now the problem is gone. Now the
signal is perfect
I'm trying to use a dynamic mic with the K3 (KIO3 MIC INPUT high gain)
but I can't be satisfied with the modulation (I'm listening with another
radio on 144 MHz using an XV144 with the K3).
If I keep the compression level below 15 the mod is awful. Tried with 4
or 5 different dynamic mics, but
Giulio Pico - IW3HVB ha scritto:
We use a foot switch to drive the sequencer and the radio PTT is
controlled via the external PTT socket.
I've noticed another couple of issues regarding CW this time.
Squeezing the paddles (or using only dots or dashes, doesn't matters)
with no external
I've noticed one possible issue using the KDVR3, wich I've installed today.
The PTT is controlled directly by the radio, so basically when you go
for playback the radio goes on TX automatically.
This is a problem for us, cause on our VHF station we deal with an
external sequencer who manage to
I've found something weird working with this setup:
K3 and XV interface connected to an XV144 via ACC cable and if cables.
Once set up the sw parameters the xverter seems to work fine at home.
If I change band on the K3 the XV144 turns up when I switch band on 144
MHz and vice versa (sounds
I noticed a strange behaviour during the last IARU VHF Contest last
weekend.
With our team we managed to have a first field test of the rig
coming for our experience with the K2/xv144 MHz combination the
expectations were high.
The setup was composed by the K3 and a XV144 transverter,
Before you ask...
Firmware Revisions: MCU 2.34; DSP 1.89.
73 de Giulio IW3HVB.
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
For whom is still tracking deliveries, with apologies about the
bandwidth for the others.
K3/100 Kit
KAT3
TCXO
KXV3
XV144
400 Hz, 1800 Hz, 2800 Hz filters
Ordered on 18/03/08
Katiegram arrived on 29/07/08
Shipped via UPS on 01/08/08
Arrived Today 04/08/08 in Venice - Italy (The box has
I made yesterday the mod suggested by Don about having an external PTT
for CW, and a problem came up.
After I found the problem I have had a talk with the K2 owner and he
told me that the problem was present even before the mod ( He wasn't
bothered about this because he doesn't go cw on air... ).
Hi to everyone,
We have a pretty bad problem here
In our VHF club station we decided to go for a new rig, and started to use a
K2+XV144.
On SSB it's all ok, but on CW i can't figure out how to deal with ptt
sequencing
We have a mast mounted LNA and a PA next to the radio.
My idea, in
23 matches
Mail list logo
