Tell me about it! I made a 1/2 wave balun for a 432 yagi. I used Times FM-8
foam coax. (RG-8 sized with low loss foam dielectric) and it was bent in a U
shape that did not exceed the bending radius. I tested it with a 700 watt
output amplifier and the VSWR went through the roof in under a
A few weeks ago, I turned on my K3 and all looked normal except that I could
not hear any signals or band noise on 160M. I recycled the power switch and
heard what sounded like an AM broadcast station, but the tuning knob had no
effect. I could not tune anything. (That was weird!!) Another
Hello Brendan,
I have two ten meter 5 el yagi antenna arrays that are just under 300 ft
apart. One is on a 70 ft tower and consists of three yagis. The other is a
single yagi at 30 ft. If the two yagis are boresighted on each other, I see
only 17 dB of attenuation between them. I checked the
I bought a bunch of those Russian TX caps. Mine were 680 pf and looked like
the 7.5 KV Centralab ceramic TX caps with threaded holes on each end. I put
two in parallel and used them for the plate blocking capacitor in a 160
meter KW triode amplifier. Big mistake. They cannot handle much current
Hello Vic,
It sure behaves like a ferrite core heating up! After that, you must check
everything up at the antenna. One thing you might try is to see how long it
takes for the VSWR to drop to normal after a long key down session. A long
time indicates something with some mass to it that holds
I think I win the prize for not checking the obvious. I turned on my
homebrew 160 meter 3-1000Z amp and saw only 400 watts instead of the normal
1300 watts out. I ended up taking the amp apart, and measuring all the RF
components. I tested the cables. I had the PI network coils out. I removed
There used to be a larger number of "serious weak signal VHF operators, but
the serious VHF operators are all dying off with no young ones to replace
them. I use three K3s and three K2s in my VHF station. I have one Ten Tec
OMNI V as well on 432. The big difference between a great HF vs VHF
the cables
accurately.
Dave K1WHS
- Original Message -
From: "Josh" <j...@voodoolab.com>
To: "Dave Olean" <k1...@metrocast.net>
Cc: <elecraft@mailman.qth.net>; "Bob McGraw - K4TAX" <rmcg...@blomand.net>
Sent: Thursday, September
I am using K3 Utility and, in the past, have been happily downloading
firmware onto my computer for use on several K3s here as well as my
brother's K3. In the last few days, I have been trying to update my K3 to a
newer firmware release but keep getting an error message that Access is
denied
Hello Matt,
Wow, with those power levels and a 20 ft spacing between 3 el yagis, you are
cruisin' for a bruisin'. I made some measurements at my home station with
two K3s on ten meters feeding different antennas. The antennas were 300 ft
apart. I aligned the two yagis to face each other and
I used a K3 with the new synthesizer and it workerd great, but with just
five watts QRP on battery power, I found condx were pretty bad. The
nor'easter that blew into northern New England did not help. We had high
winds buffeting the tent and a pretty substantial river developed right
under
I tried the same thing on the bench with an old K3 with original synth
boards (no stiffeners) that I was upgrading. The new synth boards went in
just fine and I inserted a test signal at 28.0150 at 0dBm, 1 milliwatt. I
then tuned 1 kHz away and watched the noise floor drop to S1, so that I
I had a similar fail message and found that my filters were not set up
properly. I did not have the correct filter specified for transmit. The rig
produced no output. Maybe your filter setup got messed with. Does your
transmit work otherwise?
Dave K1WHS
- Original Message -
From:
Nothing wrong except the firmware. A recent version (5.08 or 5.10) disabled
the dual band audio filter. I had the same problem. Check and see if the APF
is active when you push and hold the DB FIL button while in CW mode. It
should be active. Solution is to upgrade to 5.13.
K1WHS
-
I recently got a new K3 and it was one of the first units supplied with the new
and improved synthesizer board. In reading a few comments on the reflector, a
number of people wanted to know if anyone could detect any difference between
the old and the new. I also have some older K3s and decided
Fred
I bought a nifty up converter that converts everything from DC to 500 kHz up
to 10 MHz and can listen to the low freqs on my K3 there. It is made by
Jackson Harbor Press and has some mods made by Clifton Labs. There is a lot
of info on the Clifton Labs website about using this kit. It
Thanks to the Elecraft crew. I just assembled K3 #3 and after unwrapping all
those anti static bags and plugging everything in, the darn thing worked
great!! I did not get the 100 watt amp or a second receiver, as this radio will
be used on the higher VHF bands. I just wanted to thank Eric and
I just built a K3 (#8858) with the new synthesizer, and did the milliwatt
calibration without a hitch. I set it for 1.5 mw max output, but possibly
you did not crank the power up high enough when you started. I made that
mistake reading the power level and got low output. I used a power meter
Thanks to the Elecraft crew. I just assembled K3 #3 and after unwrapping all
those anti static bags and plugging everything in, the darn thing worked
great!! (as usual) I did not get the 100 watt amp or a second receiver, as this
radio will be used on the higher VHF bands. I just wanted to
Hi Elecrafters,
I have been using a KRC-2 for about one year, to control microwave
transverters and provide seamless interfacing between the K2 and the
microwave bands of 903 and up.
My question is: When will the KRC-2 be updated to accomodate the six
TRN bands that are in the version 2.04
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