A few bits about LEDs, including a response to Ron, ZL1TW's question about
dimming over time.
LEDs do dim over time. Since they usually do not suffer catastrophic failure
that stops all output altogether (like an incandescent bulb does when the
filament fails) their end of life is typically
On Thu, 2006-07-13 at 04:02 -0400, [EMAIL PROTECTED]
wrote:
Re: Blackwidow (Nick Waterman)
Using a piece of plate glass and some spray adhesive, you can take
sheets of 400, then 600 all the way to eight hundred grit wet/dry sand
paper and fix it to the plate glass.
That surface can be used to
I have been very pleased with My K2 which I purchased at Dayton back in
2005. So pleased, that I have persuaded a few others to take the plunge and
build K2s, here in the UK.
I have been looking at the feasibility of building an Elecraft XV50 for the
70MHz band to use with my K2. Interest in
Hi Ron,
Because we use a K2 for CW contesting (Multi -one and Multi-Two)
and need dual headphone output, I set up a dual headphone pair of
sockets under the bench - it keeps the op's headphone cord from
laying across the computer keyboard and enables a trainee op to
watch and listen to the
In message [EMAIL PROTECTED], Allan Duncan
[EMAIL PROTECTED] writes
snip
Whilst I am aware that Elecraft’s core market is in the US and Canada, I
think they are missing an opportunity to create a successful new product for
a very minimum of RD effort. I think an Elecraft “XV70” would do well
At 06:28 PM 7/12/2006, ron_w wrote...
would such a change give me more back light without compromising components in
the Front panel board?(ie U3). I doubt there is a problem but it is always
wise to ask ..
If you're equipped to desolder the display, you could replace the backlight
I'm reducing the price on this to $365.00 delivered via Priority Mail
to the lower 48. Again, please reply direct if interested.
- JT
On 7/12/06, JT Croteau [EMAIL PROTECTED] wrote:
Selling my well loved K1 with four two band filter boards, ATU, and a
few accessories.
K1 #292 - 2 Band Model
And if you really want it to glow, don't stop with the 600 or 800 grit
paper, visit your automotive paint supplies place and you will find grits
much finer than that, 1200 and 1600 are common and often 2400 grit sheets
can be found. These are wet/dry type papers, use with water as a lubricant
and
Hello All,
I have a large amount of various new small parts
(primarily 1/4 watt resistors including 1% types,
board mounted pots, capacitors fixed and variable,
fuses, etc). Some of these I have hundreds of the same
values.
If anyone is looking for parts, please let me know. I
am in need of
I wonder if using a power sander, which has a soft rubber backing pad, will
cause rounding over of the edges of the parts for the Black Widow paddle...
I read the instructions for polishing the brass in the Black Widow paddle using
fine sandpaper...The problem is that the sandpaper quickly
Hello all,
This is my first post to the group so I hope it works correctly!
Happy to report that K2 S/N 5556 is alive in Australia!
However I'm slightly concerned about the results I'm getting during
transmitter alignment.
After running through the TX alignment procedure twice the best results
I build and repair 1911 semi-auto pistols. All the internal parts are hand
polished and they are much harder than brass. You can do this while
watching TV if you want as it's rather mind numbing. Depending on the
surface roughness start with the 600 and progress up by 200 gr each sheet.
G'day again,
I feel such a fool!
I almost have to ask everyone to disregard my previous post.
After turning off all the equipment ready to shuffle off to bed (it's very
late/early here) I'm looking at the lab style bench power supply that I'm
using an realise that it's max supply current is
Hi,
I am building my second K2. First K2 no challenges at all but with this
one I am falling down at the first major hurdle.
Freq 10482.69 and should be between 8 to 10 MHz.
Trouble shooting no help.
VCO alignment - DMM reads 0.02V at R30 (should be 6V). Any pointers
much appreciated.
Steve,
Honestly, if we had a contest for the most unbelieveable, boneheaded,
mindless mistakes ever made in electronics, you wouldn't even come in the
running. I would beat you and everyone else on this list so badly, they
would have to give points to even it up.
Just shake it off and go to the
Steve,
FB on your power supply confusion there.
The answer to your question depends on the voltage out of your power supply
(under load). If it is only 12 volts, then my answer is yes, the current
draw is OK. But if your power supply is developing 13.8 volts or a bit
more, then your current
On Wed, 12 Jul 2006 18:46:56 -0500 Dr. Dan Swartling
[EMAIL PROTECTED] wrote:
I am half-way through building my K1 # and have hit a stumbling
block. How are trimmer caps C13 and C20 installed? On the revision E
board it is not obvious (to me) which way to orient the flat side.
Cool
Yep Allan... I'm here ..
ready to build a 70 mhz transverter if there is one from Elecraft ( with
components included ) !!!
hope cu from
Jean louis
3A/F5NHJ.. if needed..
K2 #5371
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You
Hello Ron, and the List.
I've got K2 #0681 #2681 sitting next to each other here, both glowing
happily - and equally!
I wonder, could it be that brighter leds were used in the later K2s??
Cheers, 73 to all.
Mike, zl1mh.
--
No virus found in this outgoing message.
Checked by AVG Free
Hi everyone,
I am forwarding this partial email thread from the Moon-net list to
everyone here on the Elecraft list in hopes to generate a good
discussion (not a flame war!) on the use of the K2 for weak signal use.
I would appreciate hearing all responses to this subject because I was
I actually posted the start of this thread here a couple of days ago ..
They've got valid points for EME, but they don't apply so much to
typical VHF/UHF contest work. I've only got one rove in using the
Elecraft stuff .. the low band station worked great once I got the
right combination of IF
Tony,
I do not have any real experience with weak signal VHF work, but I do have
some comments about the K2 on a technical basis that may help in your
decisions.
I would be interested to know what the filter width was in use that
generated those comments as well as the serial number of the K2
I have a very nicely built late serial # (21xx) K1 for sale with 40, 30,
20 and 15 meter band filters, KAT1 ATU and the new lighted display. Also
includes a nice homebrew tilt bale. Radio is in excellent condx in all
respects w/full output power on all bands. All manuals and 'spare parts'
Hi Don and the others. I'm an EE and here are some things to
consider. For EME the K2 will be driving the transmitter via a high
level mixer and the receiver will be a converter built to tune 432
MHz. If I were doing it I would mix down to 14.000 to 14.350 MHz. This
Hi all. I just got my K2 in the mail this morning (hooray!) and I've
been busily assembling. I did the control board and all checked out
there. Now I've soldered most all of the front panel and I got to the
resistance checks and ran into a problem.
Now when doing the resistance checks so
Michael,
OL may also mean out of range. Take the auto ranging off your DMM. OL
may just mean resistance is higher than current range allows, or something.
Vin Cortina KR2F
K1-4 s/n:1977
KX1 s/n:1476
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
OL may also mean out of range. Take the auto ranging off your
DMM. OL
may just mean resistance is higher than current range allows, or
something.
Vin Cortina KR2F
I just tried that, as well as my other DMM, and the same thing is
still happening. For what it's worth, I think the guts
On Jul 13, 2006, at 8:36 PM, W6NEK wrote:
Hi Michael,
I get the same type Open Circuit resistance readings as you and
my K2's worked just fine. All it means is the series resistance
between J1 Pins 1 - 7 is greater then 10 megs to ground which my
DMM reads as Open Circuit. If I were
WATCH OUT, WATCH OUT! Do NOT dig out that old analog meter unless you KNOW
it's designed for modern solid state gear. Making a single measurement with
it can fry more I.C.s, diodes and transistors than you may care to count!
Older meters put way too much voltage on the circuit and allowed way to
Can some one tell me the person who is winding the coils for the k2 have a
friend who wants some coils wound Sincerely Harold n5tog
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info
mailto:[EMAIL PROTECTED] - Mychael winds great toroids and his prices
are reasonable. You can download his price list and order form at the
Elecraft website
73,
Don W3FPR
-Original Message-
Can some one tell me the person who is winding the coils for the
k2 have a friend who wants
Michael,
A resistance reading stated as 50k can indeed be an open circuit.
Infinitity is greater than 50k.
One reason they are should not listed in the manual as open circuit is that
many meters will respond to just the resistance of your body should you make
contact with the probes.
If you
I have been so pleased with my XV50 that I have just started using on
6m, that I would jump at the chance to buy an XV70 to be QRV on
70MHz. Please Elecraft, think seriously about producing one.
73 de Chris, G4BUE
On 13 Jul 2006 at 9:45, Allan Duncan wrote:
I have been very pleased with My
33 matches
Mail list logo
