Fred (FL) wrote:
Did anything ever become of the idea of "INRAD will be
soon making custom RX filters for the K2"?
I saw this concluding remark, in an article on
Elecraft site, about K2.
Maybe it was a rumor, wishful thinking, or
didn't make sense to INRAD.
INRAD did make a few 400Hz CW filte
Good Evening,
Another week has flown by. Already it is Saturday and I just got
started; where did it go? There were a couple days of sun and yesterday I
was outside for an hour in my t-shirt. I think spring may be here soon
since the snow has gone at this elevation. Rain is back this
Did anything ever become of the idea of "INRAD will be
soon making custom RX filters for the K2"?
I saw this concluding remark, in an article on
Elecraft site, about K2.
Maybe it was a rumor, wishful thinking, or
didn't make sense to INRAD.
Fred, N3CSY
___
This Sunday evening, the Flying Pigs Amateur Radio Club International
will be holding its monthly Run For The Bacon. This is a friendly, two
hour QRP CW Sprint, which is open to ALL radio amateurs, will last from
9:00 - 11:00PM EDT (0100-0300 UTC Monday).
You may work stations once per band o
--- Steven Pituch <[EMAIL PROTECTED]> wrote:
> As far as the other story goescenter them on
> 2210 Hz or whatever the
> RTTY center frequency is, then narrow them down to
> about 400 hz wide and
> then it will work fabulously.
Actually, I was just reading about that on Don
Wilhelm's website
Spectrogram is also limited by the dynamic range of many sound cards. I've
used it on some computers that had an internal noise floor barely 30 db
down! Also the accuracy of the crystal clock in the sound card affects the
accuracy of frequency measurements.
Even so Spectrogram is an extremely wor
Jack,
Thank you, I should have clarified this point. As I do not own a tracking
generator with built-in programmable offset, when looking at a filter when
there is a receiver signal mixer between the generator and the spectrum
analyzer I use the outboard mixer plus generator approach, with the sp
(The crystal filters in RTTY mode are unusable for
RTTY because they're centred on voice audio
frequencies and not RTTY freqs. But that's another
story.)
Hi Ken,
As far as the other story goescenter them on 2210 Hz or whatever the
RTTY center frequency is, then narrow them down to about 400
Mike,
RF-C2/C2A is the capacitor choice for selecting K1 VFO range. My K1 manual
addresses this on pages 12 and 38. You may need to change a crystal for 30
m, too.
Scott N1AIA
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Post to: Elecraft@mailman.qth.net
You must b
Hi folks,
I'm operating in the BARTG RTTY contest this weekend
with my K2 with a Tigertronics SL-1+ audio interface
and a MicroHam CW Keyer, which handles the computer
control of the K2. I'm using MMTTY and N1MM logger.
Everything worked fine last night. I was in RTTY mode
because the DSP filte
On Sat, 17 Mar 2007 Darrell Bellerive (VA7TO) wrote
Is there something wrong with the reflector archive ... it seems to only go
back to March 14. Is there an alternate archive?
Darrel,
The search is broken but the archives themselves are still intact. The
archives at http://www.ac6rm.net/
I am trying to search the archives on the Elecraft website for information on
changing the bandwidth of the VFO on my K1 - I know there are threads out there
on this, in fact I can see some browsing back in Sep 2006... but the search
does not find them.
I tried a search target of "K1 VFO" (with
I should add another option would be to use an outboard mixer and signal
generator and create a mirror image of the K2's internal process.
Tracking Generator --> MIXER --> to K2
Mixer LO driven from a signal generator set to provide the correct
offset and frequency inversion.
Adds a bit of c
Geoff:
Your approach assumes that the tracking generator has a programmable
offset, doesn't it? RF Generator output, for example, sweeps from 7 -
7.4 MHz with the K2 tuned to 7.2 MHz, but the detector needs to sweep
5115 - 4715 KHz, if I've got the maths right. (Sweep also must be
inverted to
is there a suitable program for mac or linux?
For Mac OS X ... I used iSpectrum, from Dog Park Software. I used
the free demo version. It was a snap, taking all of ten minutes.
``iSpectrum is an easy to use audio spectrum analyzer that allows the
user to view live audio in a standard fre
Hi Brett,
My personal preference when looking at the response of any filter is to use
a RF Spectrum Analyzer and a tracking signal generator. When it comes to
looking at the response of IF filters already built into a receiver the
tracking generator can work at the antenna frequency rather tha
Is there something wrong with the reflector archive at
http://www.ac6rm.net/mailarchive/html/elecraft-list/
No matter what I search for it seems to only go back to March 14. A search
of K2 produces on 43 results.
Is there an alternate archive?
Darrell
--
Darrell Bellerive
Amateur Radio Stati
Hi Brett:
I got my front panel board done today, and
started on the RF board.
So far all seems good, very easy to build, at least
so far
In case anyone is wondering, they are up to SN 6065!
I have read a bit here about setting up the filters, and
it being critical, and you need the spectr
Very awesome, thank you. This is one of the reasons I have played with
Spectrogram yet, as I have to get over to the Windows machine to set it
up and do it. Anything special you had to do to setup baudline to get
it working? Not from the install point of view, but settings and such.
David W
Top class software
Baudline is a time-frequency browser designed for scientific
visualization of the spectral domain. Signal analysis is performed by
Fourier, correlation, and raster transforms that create colorful
spectrograms with vibrant detail. Conduct test and measurement
experiments with
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