In a message dated 9/27/07 8:34:12 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
his whole station was classic - vintage
stuff. I mentioned it and he said it got old by itself. It was new
when I bought it 35 yrs ago HI HI.
And that got me thinking.
In 35 years will be still be
N6VL:
OK, I know this is personal preference thing. But with the K2, it isn't easy
to change CW pitch on the fly. While the sidetone frequency can be easily
changed, CAL FIL needs to be redone. Many other rigs will allow you to
select the CW pitch or offset on the fly.
For me this was
At 9/29/2007 07:52 AM, [EMAIL PROTECTED] wrote:
- How easy it is to keep working
That last one is a biggie. A lot of vintage gear survives on the air because
it's easy to keep going. A lot of newer gear is relegated to the heap because
you can't get parts, or the skills/tools/test
I had been using 650 Hz for awhile but decided to go to 800 Hz for
some reason. It just sounds better to me now. Maybe becuase I got used
to it while using my code practice program; higher pitch seems to
sound better for QRQ.
I was thinking of doing a bunch of filter alignments at sidetone
Hi
I am an OEM supplier of controllers used in the waste water business. I have
needed to do a redesign at least 3 or 4 times in the last 10 years because
the MPU's or other IC's are fazed out and no longer made by the manufacture.
They will usually spec a replacement but it is usually not pin
On Sat, 29 Sep 2007 08:42:05 -0400, Bill W4ZV wrote:
I like very low pitch (240-270 Hz) for extremely weak signals in white
noise. I like 300 Hz for normal operating but go to 400-450 Hz in contests
with a reasonably wide bandwidth (6-700 Hz) to catch off-frequency callers.
On a wide
Drew,
There is nothing electrically preferred by the K2. If your BFO range is
adequate, the pitch can be set anywhere the BFO will support - and that
will usually allow a filter center frequency up to 1000 Hz.
However, look at the KAF2 and KDSP2 options for their upper frequency
centers
Hi
I have a method that works well for me to adjust the power/SWR bridge.
You will need to make up two additional dummy loads besides your 50 ohm.
These need to be 25 ohms and 100 ohms. I used 2 50 ohm 2 watt MOS resistors
mounted inside a PL239 connector wired in series for the 100 ohm and in
Don and all,
This is exactly the method I have been using on all the Elecraft
wattmeters that I have worked on for several years now. I believe you
mentioned it first, so I do have to give you all the credit for this
great idea.
It does result in a more accurate setting of the trimmer
K3 Status Update - Sept. 29, 2007
We are continuing down the final stretch and so far things are looking
pretty good.
Last week:
Wayne and the Field Testers continued to test the firmware for the K3
and the '1 button press' K3 firmware downloader. We'll be releasing new
K3 features on a
Thanks to all for the replies.
As of right now, I'm going to blame it on a bad relay. I had damaged
one, K8, slightly during install but thought it was only a flesh wound
and that it wouldn't effect operation until I could get it replaced.
Offender removed and I will order a replacement next
Eric,
Thanks for the detailed update. Thanks also for shipping out the balun kit's
I ordered in good time despite the amount of stuff going on - storage
space must be getting interesting!
Regards to the team,
Paul M1PAF
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL
Don,
While we are on the subject, I might say something about very low
pitches (since it has been mentioned) - there is a limit to how
low you can go and still retain the single signal reception because
a significant amount of the filter passband crosses over from zero
Hz pitch to the
Joe,
I believe that has been taken care of for you in the K3 - but the low
limit could still be restricted in the firmware. With the DSP IF at 15
kHz, the answer to your question will depend on how the demodulation is
done in the DSP - but remember that DSP can produce very steep (and
deep)
A lower pitch can be benficial because the same absolute frequency
difference between two CW signals is perceived different at a different
pitch.
Two signals 40 Hz apart are much easier seperated at a pitch of 400 Hz than
at a pitch of 800 Hz. At 800 Hz the difference is 5%. At 400Hz it is 10
I like 450 hz...
I've also found that trying to use anything much lower results in the
case someone else has given ... the opposite side of zero beat starts
to appear ... decidedly undesirable ... for me anyway.
Slightly related ... I note see four distinct gain peaks in the
waterfall
display
On Sat, 29 Sep 2007 18:56:26 -, Roelof Bakker wrote:
Two signals 40 Hz apart are much easier seperated at a pitch of 400 Hz than
at a pitch of 800 Hz. At 800 Hz the difference is 5%. At 400Hz it is 10 %.
This is the way our BSP (biological signal processor) handles it.
Yes, this is very
Ken,
That is one reason I recommend using the OP1 filter (set the same as the
SSB FL1) for the RTTY FL1 setting. I make the RTTY FL2 thru FL4
settings narrow enough that there is no significant passband ripple (I
typically use 1.00, 0.70, and 0.40 centered at 1000 Hz).
In use, one would
I regret adding to the noise but I didn't see this in the FAQ and I'm
curious about it.
Are you making any effort to ship the K3's in the order that orders were
received or is there some other algorithm being applied? (For example, it
might depend on what options a person selected, what part of
We used to have a Gaffers and Sattlers Range back in the 70s that had a 110V
gas valve relay. It made a horrendous hash noise for the duration of a
firing, between 10 and 30 seconds depending on the temperature setting, and it
was
longer when first turned on. My point is - check for AC line
Folks,
It has been pointed out to me that I left out one step in my stepwise
calculation for power - there is one more step to be added and that is
to divide by 2 one more time - that is usually done just after the
'multiply by the square root of 2' in the steps below.
Just one more reason
On Sat, 29 Sep 2007 12:20:21 -0700, Jim Brown K9YC wrote:
On Sat, 29 Sep 2007 18:56:26 -, Roelof Bakker wrote:
Two signals 40 Hz apart are much easier seperated at a pitch of 400 Hz than
at a pitch of 800 Hz. At 800 Hz the difference is 5%. At 400Hz it is 10 %.
This is the way our BSP
Drew,
Like other things in life, one often must make compromises. That
compromise would ideally be made based on your preferences and with
knowledge of what is best for certain conditions.
We know that low pitches are better for the brain to separate two
different pitches (a signal in
Hi Eric Craig,
@Eric - The update sounds very exciting! Thank you.
I realize this is a trivial question, but for those of us who take some
degree of pride in low serial numbers, the answers to these questions would
be at least interesting.
@Craig - I had to ask Elecraft to delay my K3 until
Don,
See if this narrows down the problem correctly.
Voltage readings at: J3 = 12.6 Volts Input from
battery, and voltage regulators read 4.94v. from
U5(L78M05CV) 8.0v. from U4 (LM2930T8). Pin 32 of
U6, of control board reads same as U4(8.0v.). The
4-MHz
oscillator signal is detected by a
On Sat, 29 Sep 2007, Craig Rairdin wrote:
I realize this is a trivial question, but for those of us who take some
degree of pride in low serial numbers, the answers to these questions would
be at least interesting.
Some folks take great pride in building their radios, while others feel more
W3WPR:
While we are on the subject, I might say something about very low
pitches (since it has been mentioned) - there is a limit to how
low you can go and still retain the single signal reception because
a significant amount of the filter passband crosses over from zero
Hz pitch to the
Is the Mic BIAS voltage (Pin 6 on front panel mic connector) variable or
a fixed voltage?
Pin 6 is fixed, 8V.
73,
Lyle KK7P
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The Hex Key has been sold.
Thanks!
Ralph Webb; VE7OM
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Joe,
I believe you are mixing 'zero beat' with zero frequency audio (or DC) -
unless I misunderstood your note.
It makes no difference if the DSP is working at audio (baseband) or at
an IF frequency, the filtering is set to a specific width and the math
figures it out - the resulting signal
Great Lyle,
Perfect, that's exactly what the SM-20 needs to power the internal preamp.
I'll continue on with the mic adapter plug.
Thanks,
Frank - W6NEK
- Original Message -
From: Lyle Johnson [EMAIL PROTECTED]
To: 'Elecraft Discussion List' elecraft@mailman.qth.net
Sent: Saturday,
Don Wilhelm wrote:
Properly done, a 500 Hz roofing filter would be centered above the audio
zero frequency entirely, so the roofing filter response would extend
from (say) 150 Hz up to 650 Hz - nothing on the opposite sideband, and
even if it does spill over a bit on the filter slope, the DSP
I was aligning inductor slugs and trimmers last night on SN01762. An
Avometer on 2.5 volts AC range was connected across the speaker
terminals. I found that there was no change in audio output as I rotated
the trimmers when aligning twenty metres. Very odd.
Problem found! While standing to
Good Evening,
It is chilly and cloudy with a mist falling as I write this but
Barber's Adagio for Strings is playing and the fire is warm. Sam has
moved to his box near it and is sleeping soundly. During the course of
the week there were a few dry days. With some help from a friend I
Kevin Rock wrote:
P.S. Music is now Ride of the Valkyries by Wagner :)
I used to listen to a Walkman CD player at work, usually classical and
jazz. A friend offered me a set of Wagner's Ring Cycle CD's. I explained:
1 Richard Wagner wrote music with concrete notes that are very heavy
2
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