Since it is meant for public consumption, maybe Wayne won't mind that I
reproduce this, that Wes also cited (from the Elecraft website), written by
Wayne, N6KR: Maybe we can agree that Wayne and Elecraft ought to know. And so
end of thread.
---
What "Roofing
Okay, I'll give up, we'll just have to agree to disagree.
On 6/14/2018 6:33 PM, WILLIE BABER wrote:
Wes,
"A "Roofing filter" is simply a filter in the radio's first IF through which all signals must pass before they
will be "seen" by later receiver stages. The narrower this filter is, the
There are at least two excellent reasons for the narrow crystal filters
in the first IF of the K3(s). (Wayne can correct me if I'm wrong.)
One, of course, is to reject the image of the second IF. However, the
dynamic range of the ADC in the second IF, by itself, just isn't enough
to provide
Am setting up a newly acquired used K3 which came with no microphone. Is
it possible to use an adapter to make a Lightspeed Zulu noise cancelling
headset work for the K3. I got very nice reception using the cell phone
attachment line but can't identify any microphone function. The two main
Wes,
"A "Roofing filter" is simply a filter in the radio's first IF through which
all signals must pass before they will be "seen" by later receiver stages. The
narrower this filter is, the less exposure later stages will have. Thus a
"narrow" roofing filter is desirable -- but "narrow" is
With that, lets end the thread.
73
Eric
/Moderator etc.
elecraft.com/
On 6/14/2018 11:30 AM, Rose wrote:
Well said, Rick!
73!
Ken - K0PP
On Thu, Jun 14, 2018, 12:09 Rick WA6NHC wrote:
As a retired career firefighter (line Captain), I say:
A POX on the push in connections.
>those "backstab" receptacles that electricians love to use because
they are quick and easy do not have adequate contact stength and can
overheat and cause voltage drops and a fire hazard.
Here's a weird one:
Two years ago, I bought a house that had been built in 1980, by the
folks that I
Totally agree, Don. The receptacles you refer to are extremely secure
... even better than the ones where you have to wrap the wire around the
screw because if you aren't careful the wire can squeeze out from under
the screw (don't ask me how I know that). The ones you mention also
have
Will,
First of all I have said before and will repeat it, I detest the term "roofing
filter." That said, by the generally accepted definition, you are wrong. See
Elecraft's take on this:
http://www.elecraft.com/K3/Roofing_Filters.htm
If you will think in Wayne's terms, the post-mixer
Hi Guys.
For what it's worth, I find it interesting how the term "Roofing filter" has
changed a bit over time and with different 'ownership'.
Personally, I first came across the term in around 1966 as a junior design
engineer working on the Redifon R550 series of HF receivers. I understood
The gain compression I measured, between 1000 and 1500 W on 40 meters, was 1.4
dB. I used the K3 and KPA1500 power meters. Factory calibration of the
KPA1500.
Scott K9MA
--
Scott Ellington
--- via iPad
> On Jun 14, 2018, at 2:51 PM, Paul Baldock wrote:
>
> What you report of
It's a simple visit to ohms law.
OR
Just grab a "kill a watt" tester and look at your current draw.
With a quick "in the head math" the 15 amp breaker will be fine.
Remember the 30amp supply is at 13.8v not 117v ac the panel breaker is at.
Again
Ohms law.
BTW : glad you asked the question
Bob and all,
Yes, those "backstab" receptacles that electricians love to use because
they are quick and easy do not have adequate contact stength and can
overheat and cause voltage drops and a fire hazard.
If I were to discover them in any house I occupied, I would pull the
wires out of the
My KPA-1500 order is processed and shipped, with a UPS tracking number.
It was ordered on February 26, 2018.
It is supposed to arrive in 5 days. I will let you know next when it
arrives. 73's
Ron Durie WB4OOA
Elecraft K-Line
__
What you report of compression near the maximum
power is certainly true of the amplifiers like
the SPE-1.5K that use a single device, but I
would have thought this would not be true of the
KPA1500 that uses 2 devices. This is the reason I
returned my SPE and ordered the KPA. Hopefully
the
Dear Friends,
I had just the same issue with my KX3 and was fixed switching MIC BTN menu to
PTT.
Thanks for this great information!
All the best to all,
73’s
Fernando, PY1BL
Sent from my iPhone
> On Jun 14, 2018, at 3:17 AM, VK7JB wrote:
>
> Well, I just checked and switching MIC BTN to PTT
Well said, Rick!
73!
Ken - K0PP
On Thu, Jun 14, 2018, 12:09 Rick WA6NHC wrote:
> As a retired career firefighter (line Captain), I say:
>
> A POX on the push in connections. One should NEVER use them, they are
> bound to fail sooner due to the mechanics involved (each un/plug flexes
> the
On 6/14/2018 10:18 AM, ANDY DURBIN wrote:
When I added my KPA500 to my TS-590S station I found the drop in mains voltage
unacceptable.
I'd bet that was because of the IR drop in the long #14 wires feeding
the outlet (and maybe other stuff running off that circuit).
Yes, 240VAC is better,
We've just updated the Elecraft Shipping Status page for the KPA1500:
We have been ramping up production and are now preparing to ship orders received
through Feb 27th.
New Orders should ship 6.5 weeks after day of order, based on our current
backlog.
Also, check the Elecraft shipping status
As a retired career firefighter (line Captain), I say:
A POX on the push in connections. One should NEVER use them, they are
bound to fail sooner due to the mechanics involved (each un/plug flexes
the internals and the binding spring and eventually fails) and they WILL
cause issues (such as
John, I didn’t think you were suggesting changing breakers. The original post
asked if he could change out breakers to a 20A or 30A breaker.
Sent from my iPhone
> On Jun 14, 2018, at 1:39 PM, Jim Brown wrote:
>
>> On 6/14/2018 4:14 AM, j...@kk9a.com wrote:
>> It should be fine to run the
On 6/14/2018 8:47 AM, Lynn W. Taylor, WB6UUT wrote:
Many of the newer receptacles have a similar hole, but the screw is
actually connected to an internal clamp.
These are very nearly as easy to use as the old push-in receptacles,
but far more secure since you're actually tightening the screw
On 6/14/2018 4:14 AM, j...@kk9a.com wrote:
It should be fine to run the KPA500 at reduced power using your existing
15 amp outlet, unless you have a lot of other stuff plugged in.
No power reduction is required -- let's do the simple math. The KPA
draws about 10A at 120v keydown. That 12v
"Will 15A house line supply enough juice for the K3S, KPA500, KAT500, and in
the future a P3 Panadaper?"
When I added my KPA500 to my TS-590S station I found the drop in mains voltage
unacceptable. I made some changes in power distribution and now have a web
power switch connected directly to
It depends on the inspector.
You're correct about code and safety. Bigger wire has less loss and
will stay cooler.
Inspectors may look at a job, see a 15 amp breaker and yellow NM, and
insist on the "correct size" breakers, and the "correct" 15/20A outlets.
Sadly, code is often what the
On 6/14/2018 6:07 AM, Bob McGraw K4TAX wrote:
> For the ham station, I ran a dedicated 240 volt circuit with #10 wire
> but used a 20A breaker in the panel. Likewise a dedicated 120 volt
> circuit, #10 wire and a 20A breaker.
You can always /undersize/ the breaker - the code specifies
NO! The wire will get very hot, and you may burn down your house as a
result.
On 6/13/2018 8:02 PM, Michael Gillen via Elecraft wrote:
2) If not can I get away with replacing the breaker with a 20A breaker? 30A?
__
Elecraft mailing
Many of the newer receptacles have a similar hole, but the screw is
actually connected to an internal clamp.
These are very nearly as easy to use as the old push-in receptacles, but
far more secure since you're actually tightening the screw on the side
to secure the clamp.
73 -- Lynn
On
Hello Wes,
I took a look. Both designs are using the idea of "roofing filter" to refer to
up-conversion radios similar to the use of up-conversion 3khz filters as
roofing filters in Icom radios.
"Roofing filter" (a mode specific filter after the first mixer including narrow
cw filters) only
Hey guys thank you for the responses however I did not intend for this to get
derailed into a discussion about home wiring.
Michael
KK6RWK
> On Jun 14, 2018, at 6:12 AM, hawley, charles j jr
> wrote:
>
> I always get the 20A outlets and switches (if needed for a motor driving
> circuit)
I did not suggest changing the breaker. I wrote either use what he has at
reduced output or install at least one new dedicated circuit.
John KK9A
Sent via the Samsung Galaxy 7 edge, an AT 4G LTE smartphone.
On Thu, Jun 14, 2018 at 8:26 AM, Harlan Sherriff
wrote:
> Michael,
> Do NOT replace
I always get the 20A outlets and switches (if needed for a motor driving
circuit) for everything. I have been using the strip, push in, and tighten the
screw to clamp down on the wire type. They seem very good as to contact.
Chuck KE9UW
From:
And in replacing receptacles, I found the original 1980 wiring in our
house was done by the "strip and push-in" connections. Many I found
were loose, some showed signs of heating. I took on the project to
replace all of the receptacles and switches in the house. In doing so,
I did NOT
Holy Frijoles!!
I did NOT know that.
I DID know you can use 20A/120V * outlets on 15 Amp circuits, but I hadn't
heard about the breaker spec down-grade as well.
I recently changed out all my kitchen outlets to the 20A * type mainly just
to get a heavier duty outlet. The code called for
Michael,
Do NOT replace the breaker with a larger current breaker UNLESS the wiring is
rated for the extra current.
15A = 14 gage wire
20A = 12 gage wire
30A = 10 gage wire
Harlan
K4HES
Sent from my iPhone
> On Jun 14, 2018, at 7:14 AM, "j...@kk9a.com" wrote:
>
> It should be fine to run
John, It has been my perception that the changing resistance of the 1/8” TRRS
Mic plug, as it rotates slightly when holding the Mic, is the source of the
frequency instability. Turning off the Up/Dwn function, as you have
discovered, is the cure.
Very 73 - Mike - K9JRI
> On Jun 14,
It should be fine to run the KPA500 at reduced power using your existing
15 amp outlet, unless you have a lot of other stuff plugged in. You can
always add a 240v outlet later. I ran a separate 20 amp 120v outlet along
with a new 240v outlet into the shack. Your 30 amp power supply is
adequate
Well, I just checked and switching MIC BTN to PTT has resolved the issue.
Thanks!
Looking more carefully, the frequency down-jumping glitch occurs on my KX3
about every 10-20 actuations of the PTT switch - the timing seems random,
but is often enough to be irritating. And it stops with the
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