Hi All,
I like to haunt the bargain and close-out websites. This item showed up
on Rakuten's website (formerly Buy.com). A 30 amp solar charger for about
$20.00! Here's a link:
22. Control method PWM pulse-duration modulation charge mode
Ok.. you have a square wave doing the charging. This puppy is going to be VERY
noisy electrically. Probably good for lead-acid flavored batteries, but not
for the new lighter varieties.
KK4QDZ - Now with Extra Class Priv's,
Yes, I have found this to be the pattern for me as well. The only
component on my K3 that intermittently fails is the one between my ears.
I am looking for a warranty replacement, but supplies seem to be
unavailable.
Eric, WB7SDE
On Mon, Sep 8, 2014, at 01:20 PM, Mark, KE6BB via Elecraft
I really like the PX3, but one word of caution. Read carefully in the manual
where it says to plug in the cables FULLY! Especially to I/Q cable. If you
don't, you will get no Opposite Band Nulling. Tried to do the procedure and
no reaction to either control. Pressed again on the I/Q plug and
I purchased a used Elecraft XG3 at the Shelby Hamfest and couldn't wait to
check it out on Spectrum Analyzer (SA)(Rigol DSA815 w/ tracking gen). The XG3
markers amplitudes and frequencies we spot-on according to the SA which gave me
a lot of confidence for aligning the K3 S-Meter and RF Gain
I had no trouble at all keeping in touch with my family using an early R5
vertical in 5H3 land when I was working there.
My XYL had my Log Periodic on a 75 tower and I had the R5 vertical with a
Metrum 500 watt amp, 12 volt battery and an Icom 735 in those days.
I would not ever consider the
With the initial production firmware, the PX3's per-band REFerence level may
occasionally be incorrect on power-up or VFO A/B swap. If this happens, set REF
to the desired level on the affected band.
Sorry for the inconvenience. We'll post new firmware as soon as it's available.
73,
Wayne
Mike,
The K3 S-meter response will vary with the pre-amp and attenuator
settings from band to band unless you have SMTR ABS set on in the menu.
If you are using SMTR ABS I suggest you calibrate the S-meter with the
PreAmp off rather than the PreAmp on.
If you still have variation from band
Look for the ANDREA brand ~ inexpensive
The electret mike works plug-n-play on the KX3 or K3
has single or dual headphones that are comfy to wear
like them for CW events also ~ SKCC-6099 ~
Cheers, Jan K1ND
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Interesting that you should mention these - I have a single headphone style
ANDREA NC-80 (not currently in production) which I acquired a while back, but
I've never tried the mic as I generally let my fingers do the talking
73, Al
On Tue September 9 2014 11:22:27 am Jan wrote:
Look for
I just did one of the dumbest things I've done since I tried to swim
across the Susquehanna river with all my clothes on. I survived that,
but I need help with something else.
I just turned on a computer plugged into 230v with the switch on the
power supply set to 115v. Result: bang, smoke,
Hi,Typically a device labeled as znr is a MOV, metal oxide varistor used to
protect cir u its from excessive voltage or currents. Remove the other one, you
will probably find a marking.
73s Tom
va2fsq.com
On 9/9/14, Vic, K2VCO k2vco@gmail.com wrote:
I just did one of the dumbest things
A 'ZNR is a Zinc Oxide non-linear Resistor. It is the mechanical
equivalent of a Zener Diode. It is a bidirectional (AC) device that will
conduct when a certain level of voltage is applied across it. They don't
typically have as sharp a knee as a real Zener, but are very effective for
what
Vic:
Sorry you passed the smoke test. Your mystery components sound like transient
suppressors. They are not needed for normal operation. They are there to
suppress lightning or other power line disturbances. To find out carefully cut
out ZNR12 and clean up any ashes. Then replace the fuse and
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Took the second one out. It is labeled TVR07241, which is a 240v
varistor! I can get these to replace them.
I think this one is undamaged (at least, it isn't blown up or shorted).
I wonder if the other one was a 115V one which was only in the circuit
when the switch was set for 115. That would
When in Iceland with the Navy 30 years ago, I found the Butternut HF6V very
handy and effective. Big radial field with it.
There were no trees at all, and the constantly windy location would have
made short work of a tower.
I guyed it in measured 5 directions with guys that would let the
My guess is they are both 240V rated. The parts are cheap and there are several
brands which cross over with similar part numbers. I would replace both. If 240
are not available then 270 will work fine as well. Until parts are obtained you
may use the computer. Odds are there will not be any
Hi,
Wouldn't a receiver gain calibration procedure take care of the band to band
variation?
AB2TC - Knut
Don Wilhelm-4 wrote
Mike,
The K3 S-meter response will vary with the pre-amp and attenuator
settings from band to band unless you have SMTR ABS set on in the menu.
If you are using
Typical on these type of supplies is the voltage selector switch is
single pole which converts between being a bridge to the filter caps to
a voltage doubler configuration. So, where you should have had about
320VDC, you would be in doubler mode and gotten 640VDC (230V*1.4*2).
Protection
Not in cases where the preamp and/or attenuator is used on some bands
and not for others - unless SMTR ABS is set to ON.
73,
Don W3FPR
On 9/9/2014 3:10 PM, ab2tc wrote:
Hi,
Wouldn't a receiver gain calibration procedure take care of the band to band
variation?
AB2TC - Knut
There is nothing mechanical about a ZNR. The electrical equivalent is back to
back Zener diodes with a capacitor. Some people call them Transzorbs or MOVs
to get by trade marks. The ZNR is a Panasonic trade mark
George, W6GF
On Tuesday, September 9, 2014 10:54 AM, Charlie T, K3ICH
George: Not to put too fine a point on it but ZNRs are large and slow moving so
they do have mechanical aspects but more to the point they do NOT have
capacitance, save lead capacitance (a few pf), and do NOT act like zeners. They
are much slower (ms vrs ns). They are NOT transorbs which are
Maybe mechanical was not the proper choice of words. What I was implying was
that it is not a junction device as would be a Zener or an SCR.It is simply
a chunk of Zinc Oxide that with the proper mix will start to conduct at a
predictable voltage.
In that sense, it is more mechanical than
Dave, N7AIG,
Please define stochastic resonance, a new term for me, which may
apparently aid in weak signal detection.
When I was very active on 2M CW EME, in order to better detect very
weak signals below the noise, I played all kinds of adjustment games
with the CW BW, tone and IF
Is there any way to adjust the length of the pause that the scanner makes when
it encounters a
signal? I find it is so brief that there isn't enough time for me to make a
decision whether or not
to stop the scan before it moves on. Adjusting the overall scan rate makes a
small difference,
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