How about something as simple as a "muffin" fan on
edge near the work ...either blowing across the work
or "inhaling" across the work and carrying the fumes
away from the work area. You can find either 12VDC
or 115VAC versions at Radio Scrap.
73! Ken Kopp -
K0PP
[EMAIL PROTECTED]
or
[EMAIL PROTE
I use a very old hair drier (the quiet type before series wound motors
became popular). I set the heat and blower to low so that I get a warm,
gentle air stream over my work area. I've found that without the small
amount of added heat my hands become chilled, which is not just
uncomfortable b
Well, I managed to open up the box, check out the
speaker wiring (all OK!) and close it up again, all
with out ripping out any wires (I hope! ;~)) )
Next stop is to do more on air AF level testing;i.e.,
find some decent signals, and see how audio responds.
Then on to setting the RTTY filters, ini
The K2 has been sold..
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of NZ8J
Sent: Monday, January 15, 2007 6:55 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] For Sale or Trade: K2
___
Elecraft mailing li
Dick Dievendorff wrote:
I find myself suffering asthma-like symptoms after hunching over a
fascinating project breathing solder fumes for a few hours. My
tolerance for this hasn't improved over the years, and I have gotten
into some real panic situations because I felt that I couldn't breathe
Both the original and replacement headphone jacks of my K2 failed
internally, I am reasonably certain that the cause was external.
73,
Geoff
GM4ESD
- Original Message -
From: "Tom Zeltwanger" <[EMAIL PROTECTED]>
To: "Jack Smith" <[EMAIL PROTECTED]>
Cc: "Elecraft Discussion List"
Sen
What devices would you recommend? I'm willing to spend $100, but I'd
prefer not to invest in some sort of industrial-strength device that
costs $500 or more and needs to be wheeled around. How well do these
things work for you?
I've been using a Hakko 493 for a couple of years. If you get it
I find myself suffering asthma-like symptoms after hunching over a
fascinating project breathing solder fumes for a few hours. My tolerance
for this hasn't improved over the years, and I have gotten into some real
panic situations because I felt that I couldn't breathe at all after
soldering f
Are these headphone jacks failing internally, or are pins being damaged due to
the stress on the PC board. I suspect it is the former, from the discussions,
but I did wonder why there is no stress relief on the connectors that exit the
front panel.
73,
Tom KG3V
Quoting Jack Smith <[EMAIL PROTEC
This Wednesday evening (Thursday morning UTC time) will be the NAQCC
Sprint for January.
This month, the Sprint will be held on 80, 40 and 20 meters. This month,
a special certificate will be given to the operator who gets the
highest score while braving the elements out of doors. The Sprin
I have a K2 serial number 1661 for sale or trade. It is in good
electrical and physical condition. It has the following options:
KAT2 - Internal 20W tuner
KSB2 - SSB option
K160RX - 160 m
KNB2 - Noise Blanker
KBT2 - Internal battery kit (new battery from Elecraft last week)
KAF2 - Audio Filter/R
This message was re-listed to correct my email address
I HAVE FOR SALE :
K2 S# 529 upgraded to all Revisions included PLL mod, Temp mod,
Key Click Mod, AGC mod and others. Includes KAT-2 in lid.
Additional modules are KSB2, K160RX, KNB2, KAF2, KBT2 and KIO2. Also
built in EC is the KPA-100
Paul,
I am quite familiar with the late Doug DeMaw, and have a lot of respect for
his work.
That 'test' he described is a quick check to determine if a particular
receiver has enough internal gain to hear above the atmospheric noise
present on a particular band at any particular time. The receiv
David,
Yes, AM transmission would be possible (but not practical) - by pass the
filter on the KSB2 board and unbalance the carrier balance pot - but be
careful not to overdrive the balanced modulator or any of the following
stages - the carrier will be there constantly, so you have to keep the pow
Dennis,
Yes, your gel-cell will do fine for the testing, but you will want to
consider a power supply at some point. If you are planning the KPA100, get
one large enough to handle the current - a 20 amp supply is a good choice,
but if you will remain QRP with the K2 a 3 or 4 amp supply will suffi
How complicated would it be to add AM capability to the K2 (TX+RX)?
I have operated AM on 10 meters on my Icom 730 and it was fun. Good
old AM has an endearing quaint quality somewhat lacking in SSB.
I wouldn't want to sacrifice SSB, though.
Thoughts? Has anyone done this?
Thanks
--
David Dawso
Sometimes the atmospheric noise on 10 meters can be extremely low. I
recall once working a nearly-antipodal DX station late at night (long
after the band had "closed") when there was no indication at all on
the S-meter, but perfect copy. It was like VHF weak-signal operation.
Bob, N7XY
__
Hi Dennis,
Probably the cleanest power source you can use is a battery of some sort. Be
sure to fuse the power line going to the K2, or anything you have connected to
a battery as a short circuit on a battery can deliver lots of current. I use
automotive booster packs, one has an 18 Ah gel ce
Hi Paul:
The test on one band isn't valid on other bands because the band QRN changes
a great deal with frequency. The fact that you hear little or not change in
background QRN when you remove the antenna on 10 meters with the
preamplifier off is because the K2 is optimized for maximum sensitivit
I have reached the alignment and Test, Part 1 Phase of const of k2. On page 42,
right column, step 2, it calls for a power source.
Could anyone direct me to a relatively cheap but reliable power supply (Radio
Shack, etc) give me model# etc...Also could I use a Gel cell batt
for testing? What do
I've never been floored by the K2's sensitivity. I've done the test you
mention, though probably not as thoroughly. When plugging in an
antenna, I do hear the noise floor come up. Sometimes I have to crank
the AF gain to hear it but it happens. I figure above 20 meters, that's
what the preamp i
Don Wilhelm wrote:
Paul,
I am not certain your test is entirely valid. If there is no atmospheric
noise on the band you are using, you should notice no difference in level
switching from a dummy load to an antenna.
The bandwidth of the receiver will make a great difference as well, and that
i
Paul,
I am not certain your test is entirely valid. If there is no atmospheric
noise on the band you are using, you should notice no difference in level
switching from a dummy load to an antenna.
The bandwidth of the receiver will make a great difference as well, and that
is both the IF bandwidt
Wyn Hughes wrote:
Pure fluke. The numeral "8" is considered lucky by some in older Chinese
culture, much of which still exists here. Conversely, "4" is not so good,
many buildings here have all floors ending in "-4" omitted, in the floor
numbering system.
I know we're veering way off-topic but
If you have KIO2 and run gMFSK or fldig on Linux, or if you run any of
the similar Windows programs with rig control, the waterfall can show
you the frequency exactly. But some hams don't use rig control because
their PSK PTT is done by the interface box using the computer's lone
RS232 port, a
Jeff, in addition, I would suggest that you have mistakenly used the small
RF choke RFC15, as a resistor or choke in the earlier stages of construction
at some other location. Also, what you have left is R116 a 5.1 meg resistor
which I believe is the resistor that is across the BFO coil. What is a
Hi to all on the reflector. I'd like to put something out here and see
if others experience the same thing or if I possibly have a problem with
my K2 sn5834. Someone (I don't remember who) mentioned that a great way
to test receive sensitivity is to simply check for an increase in noise
level
Hi Jim and all,
Not sure what you mean but could the following be your problem?
Say you set the K2 to USB and configure FL4 centered on 1000 Hz when you are
configuring the filter. Then when your VFO is set to a center frequency of
7070.5 (as seen on the LCD), your PSK signal will be seen at 707
it is a great sounding rig! i couldn't get over how nice the xfils are. i've
been using an icom751a for cw since i got licensed a couple of years ago and
it just has the stock filtering.
rather than upgrading it with one new filter i went for the k2 and got four!
the k2's controls seem very nic
Pure fluke. The numeral "8" is considered lucky by some in older Chinese
culture, much of which still exists here. Conversely, "4" is not so good,
many buildings here have all floors ending in "-4" omitted, in the floor
numbering system.
Co-incidentally, my phone extension ends in "68" as is my (G
I'm at the same place you are, finished up phase 2 checkout and alignment
yesterday afternoon and spent the evening listening to 40m. It will be on
the air in no time.
Jim ka2rvo
#5919
From: "Jim Miller" <[EMAIL PROTECTED]>
Reply-To: Jim Miller <[EMAIL PROTECTED]>
To:
Subject: [Elecraft] H
I too am colorblind (red-green) and have always had trouble reading
resistor values. In the "good old days", reading the colors was
difficult, but the XYL (or my mother when I was younger) was usually
around to help. They would tell me a 33K resistor was "brown, orange,
brown, orange, brown,
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