Hello Martin and all, great thread, enjoying reading the responses.
I found having been stuck at 20 WPM head copy for some time that if I
increased the sending speed above what I considered my normal reliable
receive speed I could actually read longer words much easier and with less
stress than
I would like to know, if you install the 100W
PA, and you run the K2 at 5W or 15W on
batteries in the field, is the K2 will drain
more power because the PA is installed, or
it will drain normal power like about
180 mA - 240 mA on receive ?
Jean-François Ménard / VA2VYZ
Hi all,
I'm currently building my K2 and am at the first point
to measure resistances in the circuits.
I'm using a Standard - DMM. Now the problem: When a
check should bring up let's say 70-90k and I switch
the DMM to 200k it will read abt 40k. Do I switch it
to 2M I'll get a reading much
Thanks to all for the many helpful replies on this thread. As usual one
finds that many people have trodden this path before which is encouraging.
My experience here in Europe is that the most frustrating thing of all is
the large number of sloppy fists out there particularly at the slow
I'm in UK and missing R116 ( the 1/8w BFO retaining R ) from the
K2 kit. Anyone recomend an alternative means of fixing the BFO
coil without it ?. I have no suitable 1/8w resistors in stock.
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Is there any relationship between the message subject line and the content
of these two postings?
73,
Mike / KK5F
-Original Message-
From: Jimmy Lee [EMAIL PROTECTED]
To: Leigh L. Klotz, Jr. [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net
Date: Thursday, June 17,
On Thu, 17 Jun 2004 00:33:23 -0400, Don Wilhelm wrote:
I have always thought the K2 to be a bit 'wimpy' on the audio
output - but I have found it is really adequate when driving the internal
speaker, just not a lot of reserve to overcome a high ambient acoustical
noise level.
Wayne has done a
Mike,
The 1/8 watt 1 meg resistor does two things - it provides leads to which one
can solder the very fine toroid wires, and it provides mechanical 'holding
power' for the toroid core. The resistance itself is not critical because
it is almost an insulator compared to the other impedances at
Hi
Back when this mod first came out I did not have the 1/8 watt resistor for the
beta test so I used a 1 meg 1/4 watt in its place. This will work if you remove
enough of the rubber bumper to allow the resister to set low enough so it does
not contact the bottom cover. Also when you remove
Steve WB6RSE wrote:
Anyone have any experience changing the K1 from
LSB to USB CW?
Steve,
That's an interesting question.
The K1 front end mixer injects the local oscillator (LO) signal ABOVE the
incoming RF signal (high side injection), while the product detector injects
the BFO signal
Anyone have any suggestions on a small enclosure for the BL1 and DL1 before
I order them.
Love the idea, just don't trust me and my luck to leaving electronics that
exposed HI HI
Have been toying with the idea of building them in to an EC1, but haven't
figured out a small coax switch to mount
On Jun 17, 2004, at 10:43 AM, Mike Morrow wrote:
I'd be curious about the advantages that you see in a K1 LSB-to-USB
conversion.
73,
Mike / KK5F
Mike - I have no interest in listening to SSB with the K1 and have set
it up for an 80 kc spread. The advantage to USB CW is that it has long
Hi Gang
I will help out in the Elecraft booth tomorrow at HamCom. I will have my KX1
with me and a quantity of my solar panel controllers with me. The controller
kits are $30 and include the circuit board, all parts, instructions and
application notes.
The KX1 is for sale also. Just buy me
Steve wrote:
The advantage to USB CW is that ... it is often useful to hear
what's up the band as you tune higher. ...With LSB you would
hear the last station worked only if he was below your listening
frequency rather than above, especially if the signal is weak. For
serious DX chasing, USB CW
To solve this problem see my SSB mods for K1 and see only the schematic part
regarding BFO .
Documentation to my web page:
http://it.geocities.com/giulianoi0cg/k1_page.html
73 de Giuliano I0CG
Steve WB6RSE wrote:
Anyone have any experience changing the K1 from
LSB to USB CW?
In a message dated 6/17/04 2:41:52 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
The present day LSB - USB band standards have their roots
from years ago in the availability of 9 Mc crystals / filters - when
SSB was experimental and you had to build your own. 9 Mc plus a VFO
There IS one reason to generate the SSB signal as LSB - many crystal lattice
filters (including the one in the KSB2) have a steeper slope on the low
frequency side, so the LSB generation is better than USB generation. Yes,
the sideband CAN be inverted by the proper mixing scheme - the current
I just picked up a copy of the June CQ in the airport bookshop and p.28
has a sidebar by K2MGA (CQ Publisher) on the history of SSB:
Regardless of how the SSB signal was
generated, the 455 kc USB signal was mixed up
to 9 Mc. Using a converted war-surplus
BC-458 transmitter...as a VFO,
Thanks Don,
I looked at Appendix B and redid several solder joints. I'd like to
think my resoldering solved things, but it is probably the fact that I
was reading the pin numbers wrong that caused my problems. Looking at
the schematics I finally figured that one out.
Now I'm getting 85.3K for
Leigh L. Klotz, Jr. wrote:
I just picked up a copy of the June CQ in the airport bookshop and p.28
has a sidebar by K2MGA (CQ Publisher) on the history of SSB:
Regardless of how the SSB signal was
generated, the 455 kc USB signal was mixed up
to 9 Mc. Using a converted war-surplus
As I read it, the USB signal was generated at 455Kc and then mixed up to
9Mc, thus giving a USB 9Mc signal. The VFO was then in thr 4.0-5.3Mc
range. And that was added or subtracted...
On Thu, 17 Jun 2004 8:02pm, Vic Rosenthal wrote:
Leigh L. Klotz, Jr. wrote:
I just picked up a copy of
Vic - As I recall from about a million years ago, when the hardware was
actually built, when you subtracted to get to 75m, the sideband
reversed. If not, the standard on 160-80-40 today would be USB - but it
isn't.
73, Steve WB6RSE
On Jun 17, 2004, at 4:59 PM, Vic Rosenthal wrote:
This is
True, Leigh... But you'll still have an upper or lower sideband after adding
or subtracting the L.O.. I got tripped up in that one myself until someone
pointed it out to me.
I haven't taken the time to dig around in the old QST archives, but in the
early days of SSB (around 1950) there was *no*
Hi,
I have been trying to switch my subscription to a digest mode for a week or
two. Unfortunately the mailman.qth.net does not seem to be working for this
list. I have switched to a digest mode on other list but I can't seem to do
it for this list.
Any help is appreciated.
72 and Thanks,
Ron
The use of the conversion from 5 MHz VFO is indeed how the USB vs. LSB
convention got started. With 9 MHz IF you got 4.0 MHz (80M) and 20M, (14
MHz.) 9 -5 in one case, 9+5 in the other, with opposite Sidebands.
The first use of such was probably the Central Electronics or similar tube
I got it working. A big Thank You to the person that set it up for me at
QTH.Net.
72 and Thanks,
Ron Polityka
WB3AAL
www.wb3aal.com
www.n3epa.org/
- Original Message -
From: Ron Polityka [EMAIL PROTECTED]
To: .Elecraft elecraft@mailman.qth.net
Sent: Thursday, June 17, 2004 8:49 PM
The twenty meter net was run but no one showed up this evening. The 40
meter net was a bit better with Tom and John showing up.
The list:
Tom - N0SS - MO - K2 - 008
John - N2YC - NY - KX1 - 336
Thank you very much for your support. The band was very, very noisy and
the SSB folks were all
This weekend I put together the SSB Board -- although I have a few hours of
work left on the main K2 kit. I wanted to make sure that I had SSB ready to go
when the K2 is finished. When I finished the SSB board and looked at the
installation instructions, it had a rather weird sentence or two
I just wanted to personally thank Kevin for his efforts in starting and
maintaining the Elecraft net(s). It's a lot of work, and in the process
he's tackling faster CW speeds, net protocol, and just being an MC.
Please drop by the net sometime to show your support for CW and see
what it's
Carl,
Do check the capacitor values to be certain they are correct in the BFO area
(C173 and C174 in particular as well as the correct varactors at D37 and
D38 - 1SV149, the smaller ones with the flattened 'rounded' side)!!!
You are less than 300 Hz deficient on the low end, and that is not
I just looked at my old copy of the NEW Sideband Handbook by Don Stoner
W6TNS, copyright 1958 - I have 6th printing dated June 1966.
Page 94 shows the schematic of the Central Electronics 10B phasing exciter -
and it DOES generate SSB at a fixed 9 MHz (unchanged from the 10A). The
addition of a
I think its time for Kevin to give himself a promotion. He has been Net
Control Operator, 5th class, long enough. 73, Rick - K7MW- Original
Message -
Elecraft page: http://www.elecraft.com
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Yes Bob, I corrected my post. It was 9 MHz VFO to switch SB.
-Stuart
K5KVH
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In a message dated 6/17/04 7:10:03 PM Eastern Daylight Time, [EMAIL PROTECTED]
writes:
I just picked up a copy of the June CQ in the airport bookshop and p.28
has a sidebar by K2MGA (CQ Publisher) on the history of SSB:
Regardless of how the SSB signal was
generated, the 455 kc USB
I mis remembered, it was a 9 MHz VFO in the radio I described, the one from
ZL1AAX, apparently.
Thanks math gurus.
73
Stuart
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