In any event I want to see 100w output which Im not seeing ideas or
suggestions would be appreciated.
Mike/aj9c
You're not alone: I too have less than 100 watts output from my
month-old K3. The supply voltage is 13.6 volts under load at the
Elecraft pigtail. I have an Autek WM1 and two Bird 43
Builders of the STAR rave about the tuning scheme Peter Rhodes has in
it. I built MY version of STAR with my own software and couldn't get my
variable rate stuff to work very well. KK7P is familiar with it, and no
doubt he can do better than I did.
In any case, like everything else under the sun
I lost a PC power supply, ordered a pair of replacements from Tiger
Direct. They were neither half-KW monsters nor their cheapest supply. It
had VDE/UL/FCC stickers, ALL of the agency certifications.
Suspecting a line surge had killed the original supply I decided to
stuff some MOV at the input
I have had good success with PC Power Cooling supplies. Have replaced
all
of the cheaper PC supplies with theirs. Got rid of the noise.
http://www.pcpower.com/index.html
N2TK, Tony
THIS kind of information is invaluable. I had a stash of common mode
chokes and line-certified capacitors so added
The power supplies sans the RFI filter were to repair a computer that's
now gone. I might be able to find the second supply that I never used,
but it's old business. Honestly there is so much of this coming over
that the FCC couldn't cope with it all even if it happened yesterday.
Cutting corners
I don't bitch much, but get it to the top of the list.
And on CW mode, multiply sidetone amplitude by the envelope of signals
in the passband (Lyle knows about that)
Bill - W7AAZ
__
Elecraft mailing list
Home:
Please, No! Having external signals controlling the sidetone
is a disaster.
73,
... Joe, W4TV
It is NOT a disaster, it is GREAT. The G3XJP STAR transceiver has had
it for years. The sidetone amplitude adapts to the amplitude of the
incoming signal which makes manual zero beating
After reading Bills (W4ZV) response to my comment(s) on the dynamic
range presentation I think I understand the issue taken with what I
said. Bandwidth is a terrible thing to waste but hopefully the
misunderstanding can be fixed.
I made a tongue-in-cheek comment that I could fool the guys in my
Dick, are those headphones stereo? I haven't seen anything but for a
long time, but the website does not specifically say they are stereo.
Bill - W7AAZ
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
It would be nice to explicitly give the bandwidth associated with the
dynamic range numbers. Most tests I have seen use 500 Hz but.
In any case one assumes that all those numbers are obtained with the
same bandwidth, or at least normalized to a specific bandwidth.
Without a statement of
ARRL, RSGB (RadCom), W8JI and Sherwood always use 500 Hz or
the Closest Available to 500 Hz (per ARRL Test
Procedure). Sherwood is the only tester who sometimes uses
additional bandwidths but they are always footnoted.
73, Bill W4ZV
I understand that, because I pore over others test data
Oh go ahead and get the flooded cells. The weight is spread over six
individual cells and the weight is under a hundred pounds per cell. That
way you can have quite a few cloudy days without concern. I have six
stacked on the floor against the wall under my operating table.
Solar backup would be
set authenticate k6olg
set delivery on
end
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by:
Bill, W4ZV, said
Another thing that I've heard asked for a few times that I'd
appreciate is the ability to hear the signal while adjusting pitch
rather than a solid tone. I know that if the user had no signal tuned
that they be adjusting somewhat blind. However the band noise will
still have a
W4ZC sez: And according to his gulp 20-part article, the spot level
automatically
varies in amplitude with the incoming signal (ref. Part 15, p. 4).
INDEED, it does just that...he multiplies the envelope by the
software-generated sine wave sidetone, the result is a keyed sidetone
signal in
Phase is preserved through heterodyning, so if the DSP can handle
(interlace?) ADC and DAC is there any basic reason wny TX adaptive
predistortion could not be applied within the K3 architecture?
Bill
__
Elecraft mailing list
Home:
I'd like to see the power level remembered between the two antenna
ports.
That way you can connect your amplifier to one port and always have the
power set for the correct amp drive..Phil - AD5X
GOOD IDEA.
__
Elecraft mailing
Don't shoot the engineer. Bring in pizza for him every night except
Sunday. Sunday he gets to drive the Porsche down to San Simeon and back
to air his brain out for Monday morning. Bonus ++ for neat features. We
are patient for impending Perfection.
Bill
Lyle, I've never seriously used an FT1, but this analysis of APF
sounds just about how I used the dual bandwidth setup in STAR. The only
thing that's missing from the K3 is the variable-dB depth, and sounds
like that's what Brett would like, too.
Bill
I'd rather see a menu setting in menu
K3 is wonderfully flexible and though mine is only a few weeks old I see
it's getting more flexible. BUT. I'd rather not see a scenario where a
PF gets dedicated, leaving me without any way to access variables I want
to be able to change in real time.
In fact I would be real pleased to have more
I've noticed in homebrew receivers as the bandwidth narrowed, shedding
noise and QRM I preferred the gain to go up, increaseing the in-passband
signal amplitude. I always attributed it to formative years with a
Heathkit Q multiplier. It may be an effect similar to AGC with
adjustable flatness (May
There is another group of people who appreciate a peaking function
for
CW. That group is those of use who remember using a Q-multiplier. It
had both a peak and null position and worked at the IF frequency. The
peak function was super for CW.
73 de Brian/K3KO
Hey brian, we could do high
The DUAL PASSBAND makes a pass at providing an APF type of function
where you make the DSP passband as narrow as you choose, but there's a
wider passband that's 20 dB down. Undoubtedly it isn't the same shape as
APF amplitude v.s. frequency, but conceptually a signal peak floating
on a sea of
A two-box solution would look neat. Certainly a technological Tour de
Force for Elecraft.
But the STAR really is a STEREO device. I never use it without SFX
turned on. You DO turn your SFX on, don't you? I have a homebrew 2x20W
amp and two bookshelf speakers that I use with the K3. So would there
I have a TRF 40 MHz noise receiver about 500 KHz wide that generates
blanking pulses. The idea was stolen from the Collins which had an
accessory blanking receiver for the KWM2. In my case it blanked by
momentarily interrupting the LO to the first mixer of the receiver,
providing essentially
IMHO, the problem with most blankers, as mentioned below, is that the
designers don't introduce any delay in the signal path. It takes some
time to amplify, detect and form the blanking pulses that drive the
noise gate.
Absent delay, the noise pulses get through the gate and do their
mischief
Geoff said A noise gate placed in the signal path can be a source of
IMD products, even
when it is not active.
IMHO a separate noise receiver which can be tuned over a limited
frequency
range above the band in use to avoid real signals, whose output
inhibits
LO drive when noise is present,
I put my K3 on SSB today. I have a Heil headset (with ragchew element)
plugged into the KIO3 stereo phone output and mono mic input. I have
selected rear panel mic input, low gain. I am getting five divisions on
the CMP display with mic gain at 17 and getting reports of good audio
and close to
It's not true that once signals get through the xtal filter they cannot
be removed.
A DSP filter CAN remove them...after all, the FLEX radio works without
ANY roofing filter!
But DSP can only do it when fed with undistorted signals within the
range of its A to D converter. The circuitry
Geoffrey, being brand new, I am sorting out less esoteric things in my
K3 and haven't tried to measure a filter intercept. But you can be quite
sure it is far, far higher than the second mixer so the finite filter
intercept with have no practical effect upon the in passband dynamic
range. So
W7AAZ SAID:
It's not true that once signals get through the xtal filter
they cannot be removed. A DSP filter CAN remove them...after
all, the FLEX radio works without ANY roofing filter!
W4TV SAID
That's not true. Even the Flex will not be able to remove a
-50 dBm signal (S9 +20) and
What is the two tone dynamic range of the K3 when both signals are
inside the roofing filter bandwidth?
Close-in IMD measurements are virtually always done using a CW bandwidth
filter. None of the published data (ARRL, Sherwood Engineering) tests
IMD inside the DSP process without xtal filter
I haven't even received my K3 (kit) yet and already I'm all riled up
about its knobs (HI).
James, if you have something you like better for knobs and you change
them, more power to you. If someone doesn't like the color of the
cabinet and wants to take an airbrush to it and paint it Porsche Torch
33 matches
Mail list logo
