I have aligned my K2 crystal filters with Spectogram many times, but
this time I've run into a problem that I can't figure out.
Using Don's [and the manual's] instructions, I can align F1,F2,F3 in
decreasing bandwidths. All works as per expectations. On F4, the
alignment goes "ok," [as per
It was a feeble attempt at humor, given the nearly countable infinity of
posts here on baluns over the last few years including but not limited
to what they are, what they aren't, how they work, do they even work?,
and do they even exist at all. Perhaps my attempt was more feeble than
I
What? You mean the guvmint has classified Carlsbad Caverns now?
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 4/10/2019 11:36 AM, K8TE wrote:
We have one in NM, however I am not allowed to talk/write about it. No, it
has nothing to do with Roswell.
73, Bill, K8TE
At a given operating point, there is always some load Z that will minimize
amplifier dissipation (and probably another that minimizes IMD). The problem
is, we don't normally know what it is, so guessing about it is pointless. Hence
specs like X watts into Y SWR (nominal).
Andy provided three
I think that this was covered. You don’t run a solid state unit into a
mismatch. The antenna tuner in effect takes the place of the output network
that existed with tube rigs.
Sent from my iPhone
> On Apr 10, 2019, at 11:39, Eugene wrote:
>
> The reason SWR should be of concern is the
I believe I run the highest SWR of anyone here. It is close to 100:1 in
normal operation according to EZNEC (I have never tried to measure it).
The line is open-wire line made with no. 12 (2mm) wire, only about 10m
long. The highest SWR is on 40 meters, and I calculate the loss as
around 1
The reason SWR should be of concern is the effect it has on what is presented
to the solid state output device(s) in your radio.
The output power and final stage current is determined by the load presented by
the antenna/tuner and the output matching network.
The output power is, P= supply
And for that reason as Roy stated, those components that are rated
"legal limit" are done so under MATCHED conditions. Use a legal limit
component in a condition where SWR is 2:1 or 3:1 or higher and one is
likely to find it becoming a smoke generator at legal limit or even less.
Case and
Hu...see: http://www.dj0ip.de/balun-stuff/
I seem to think this fellow has a good grasp about the "alien origin" of
baluns.
73
Bob, K4TAX
On 4/10/2019 12:23 PM, Fred Jensen wrote:
It also spawned the "balun," a mysterious device that may be of alien
origin since no one seems to
We have one in NM, however I am not allowed to talk/write about it. No, it
has nothing to do with Roswell.
73, Bill, K8TE
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Folks - We commented strongly on the post in question and closed this topic
several days ago. Thread is CLOSED.
I also posted that discussions criticizing others about race./culture etc. along
with posts or direct emails criticizing those who made inappropriate posts are
outside of list
Or 10:1 or even 20:1. However ... there's always a "however" or a "but"
... it doesn't matter. The dielectric constant of air [the insulator
between open wire conductors] is very close to 1 whereas it is much
larger for various forms of coax. Very high SWR creates very high
voltages along
Since when did nationality = race? Why do you assume Ken’s comment was based
on how Martin looks? He may have never seen a photo of him. I certainly
haven’t, that I can recall. His name sounds like it’s Asian. Is his ethnicity
Chinese, Japanese, Korean? I have no idea. Ken may have
A typical transmitter does not reverse terminate the transmission line
with its characteristic impedance, so most of the reflected power gets
re-reflected as forward power. Reflected power isn't necessarily lost
power. At least at lower frequencies, it is likely to present a much
higher
And then use the lowest loss feedline one can afford and install. This
minimizes the increased loss due to SWR.
Bob, K4TAX
Sent from my iPhone
> On Apr 10, 2019, at 11:13 AM, Ignacy wrote:
>
> Assuming that the correct load is 50 Ohms, load with SWR of 1.5:1 could be 33
> Ohm or 75 Ohm.
Not sure who had the modification for the Vibroplex Code Warrior JR posted but
THANKS!
I removed the screws holding the paddles in place and replaced them with brass
screws and washers (I used nuts as the hardware store did not have brass
washers) and I now like the paddle.
I also used some
Assuming that the correct load is 50 Ohms, load with SWR of 1.5:1 could be 33
Ohm or 75 Ohm. Or something more complex.
The load of 33 Ohm would cause bigger dissipation and the load of 75 Ohm
less dissipation but also less power.
Three options here. First, spend hrs/days optimizing your
If you want your antenna match to be correct use aScopeMatch as I describe on
my 630M web-site.
Thanks 73 Ken K5DNL
www.k5dnl.com
On Wednesday, April 10, 2019, 9:03:48 AM CDT, Andy Durbin
wrote:
As a counter to those who are asserting that SWR 1.5:1 is a good enough match
for an
As a counter to those who are asserting that SWR 1.5:1 is a good enough match
for an antenna system I offer measured data for the KPA500.
At 14.005 MHz my KPA500, when connected to a 1.44:1 SWR load (R37, X9), had a
PA dissipation of over 500 watts when producing 400 watts RF output. When the
What gets me is that Ken was not commenting on a race but a culture. He was
completely wrong in his assessment of the culture to which the head of MFJ
belonged, but that’s another issue. It should not have been implied he was a
racist for that comment. An apology is due, IMHO. The word
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