Kanga LCK transceiver kit
Hi all,
A friend of mine just gave me a Kanga L.C.K. CW transceiver kit. Unfortunately the box does not contain any instructions.
I searched the internet and found nothing on this kit.
I would be very happy If someone could send me a copy of the manual, or at least of the schematic diagram.
Thank you very much in advance,
Claude, HB9CGL
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Re: Kits and Parts "Organic 5Watter" transceiver kit [long]
Well let's not pit our superheroes against each other!
On qcx I was saved by that wonderful manual, not paper but using those colors on a screen to place each part. When I had a missed connection, the built in RF source and my fingers found it. With most of Rx at audio, troubleshooting is possible but more challenging.
The traditional designs, superhet, are easier for that kind of troubleshooting.
Curt
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Re: Ferrite Maximum AC Flux Density
John:
I have read in other MicroMetals literature that the maximum continuous
exposure temperature limit for the plastic binders that hold the iron
powder in shape as toroids is 128 degrees C.
A lot of the magnetic metals have a Curie temperature in the same general
temperature region.
If you hit the Curie temperature, the inductance value drops significantly,
until it cools down again.
So temperature rise is one of the controlling variables, probably dominant.
I expect that the flux limits are determined as some kind of temperature
rise limitation, probably empirically for each type of material.
Micrometals does not release the exact formulation, just some
generalization about what the general chemistry is.
So, you don't have the information to probably engineer the answer.
I suspect the answer is the same for the ferrites from Fair-Rite.
So, as a designer, you need to know the operating temperature limits, how
well you can cool them, your maximum ambient temperature, and derive the
maximum allowable temperature rise in operation.
--- Graham / KE9H
==
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On Sun, Jun 30, 2019 at 1:00 PM John KN5L <john@...> wrote: Hi All,
I may not have asked the question very well.
At the bottom of:
is a table of extrapolated AC flux density limits for both iron powder
and ferrite cores as a guideline to avoid excessive heating.
For example, at 7MHz, guideline limit is 57 gauss.
The question is how was 57 gauss, as a limit, derived?
Following pages discuss computing device gauss and temperature rise
equations.
Performing some computations using two Ferrite cores with equal size and
turn count:
15T FT114 -43 and -61, Ae=0.37, 100W 50 Ohm 70.7Vrms, B=41gauss
Computing Ferrite core loss, parallel resistance, using Fair-Rite
complex permeability data:
FT114-43 Rp=4.41kOhm = 1.13W
FT114-61 Rp=75.3kOhm = 0.066W
The -43 device will be much hotter than -61 device, though flux is equal.
John KN5L
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Re: Ferrite Maximum AC Flux Density
Hi All,
I may not have asked the question very well.
At the bottom of:
is a table of extrapolated AC flux density limits for both iron powder
and ferrite cores as a guideline to avoid excessive heating.
For example, at 7MHz, guideline limit is 57 gauss.
The question is how was 57 gauss, as a limit, derived?
Following pages discuss computing device gauss and temperature rise
equations.
Performing some computations using two Ferrite cores with equal size and
turn count:
15T FT114 -43 and -61, Ae=0.37, 100W 50 Ohm 70.7Vrms, B=41gauss
Computing Ferrite core loss, parallel resistance, using Fair-Rite
complex permeability data:
FT114-43 Rp=4.41kOhm = 1.13W
FT114-61 Rp=75.3kOhm = 0.066W
The -43 device will be much hotter than -61 device, though flux is equal.
John KN5L
|
Re: Ferrite Maximum AC Flux Density
Page 36 to 41 has more depth and calculations.
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Re: Ferrite Maximum AC Flux Density
John, Found this: Amidon documents maximum flux density guidelines in:
is there a reference to a technical document which derives these max
flux values? W5USJ, EM22cv, QRPARCI #5422
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Ferrite Maximum AC Flux Density
Amidon documents maximum flux density guidelines in:
is there a reference to a technical document which derives these max
flux values?
John KN5L
|
OK.? I'll do it tomorrow as I awaiting a reply to the email.
I will do a 1W as an example without additional add ons.
Will include labeling after painting.
Give me a couple of days to watch paint dry, even though were
are over 40 deg C, but I bake at 65 deg C in a toaster oven
to protect the surface from blowing sand and critters outside.
later,
chuck, k7qo
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On 6/28/19 7:17 PM, Mark Schoonover wrote: Chuck,
I'd be happy with general instructions on the technique. I'll be
mentioning your lab notebook on my next live stream July 6
th!
73! Mark KA6WKE
|
Chuck, I'd be happy with general instructions on the technique. I'll be mentioning your lab notebook on my next live stream July 6 th! 73! Mark KA6WKE Website: Live Stream: YouTube Live!: Author: 4NEC2 The Definitive Guide EMail List:: [email protected]On Thu, Jun 27, 2019 at 7:24 PM chuck adams <chuck.adams.k7qo@...> wrote: Mark,
You're right. I did not write it up in the lab notebook
and that is my fault. I thought of it. I thought it through. Just
didn't type it
in.
And, just for reminding me of that fact that it should be in the book, I
will spend
tomorrow doing one for a 1W. Your call. You want it with a digital
display or do
you want one with an audio frequency readout. Can't have both in one
day. :-)
You choose.
chuck, k7qo
On 6/27/19 6:59 PM, Mark Schoonover wrote:
Thanks for the quick response Chuck. Not sure where this lab notebook has
been all my life! It has a section on making enclosures out of PCB but
didn't see anything about Al enclosures. I'll check out Youtube when I have
time.
73! Mark KA6WKE
Website:
Live Stream:
YouTube Live!:
Author: 4NEC2 The Definitive Guide EMail List:: [email protected]
On Thu, Jun 27, 2019 at 6:40 PM chuck adams <chuck.adams.k7qo@...>
wrote:
I use 0.040" Al. I have section in the lab book and in some youtube
videos under K7QO.
I use a cheap Harbor Freight brake, also documented in both of the
above so that I don't want to take up much room here.
FYI
chuck, k7qo
On 6/27/19 4:26 PM, Mark Schoonover wrote:
Chuck!
What thickness of Al did you use? I take it you have a bending brake of
some sort?
73! Mark KA6WKE
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Re: Australian Parliament: An inquiry into truth in political advertising
This is a virus driven post infecting Norm's PC - DO NOT CLICK THE LINK
|
Re: Australian Parliament: An inquiry into truth in political advertising
Hardy ha ha.
Interestingly enough, I have heard that the original Nigerian scam started in Australia.
73 everyone,
Paul VA6PW
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On 28/06/2019 1:25 PM, Michael N6MST wrote: Paul,
These people just need help!! Just last week I helped a Nigerian prince and I would have never known about his plight if he hadn't sent me an unsolicited email.
:P
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Re: Australian Parliament: An inquiry into truth in political advertising
Paul,
These people just need help!! Just last week I helped a Nigerian prince and I would have never known about his plight if he hadn't sent me an unsolicited email.
:P
|
Re: Australian Parliament: An inquiry into truth in political advertising
marjannorm writes: Our goal is to reach 25,000 signatures and we need more support. You can
read more and sign the petition here:
Hopefully everyone sees the "red flag" associated with emails like this. Never click on an unsolicited link like this. A known hack. 72, Paul NA5N
|
When I bought a uBitX (semi)kit I had grown tired of cobbling enclosures and I bought the cheap Harbor Freight brake. I would have look up the specs but I think it is supposed to handle steel up to 16 gage. I bought some new steel sheets (18 or 20 gage). I think thicker steel would be really difficult for that brake and the specs are "overrated". Aluminum would be much easier and the brake has different (thicker) specs for aluminum.
The steel I bought is not plated or coated and it took paint very nicely. I used Silver Hammertone paint on the uBitX. That aluminum box looks very nice:) a little patience can get good results from that *cheap* brake.
73,
Bill KU8H
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On 6/27/19 9:40 PM, chuck adams wrote: I use 0.040" Al.? I have section in the lab book and in some youtube
videos under K7QO.
I use a cheap Harbor Freight brake, also documented in both of the
above so that I don't want to take up much room here.
FYI
chuck, k7qo
On 6/27/19 4:26 PM, Mark Schoonover wrote:
Chuck!
What thickness of Al did you use? I take it you have a bending brake of
some sort?
73! Mark KA6WKE
.
--
bark less - wag more
|
Australian Parliament: An inquiry into truth in political advertising
Hey,
I just signed the petition "Australian Parliament: An inquiry into truth in
political advertising" and wanted to see if you could help by adding your
name.
Our goal is to reach 25,000 signatures and we need more support. You can
read more and sign the petition here:
Thanks!
Norm
|
I typically make enclosures with galvanized steel. It is readily
available because it's used in roofing, HVAC, and pretty much
everything else. One drawback is that it doesn't drill as easily as
aluminum and can't really be used for heat-sinking. I can get large
sheets of it for a little bit more than a dollar each, and it cuts and
bends easily.
Ed AE7TE
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On Thu, Jun 27, 2019 at 7:24 PM chuck adams <chuck.adams.k7qo@...> wrote:
Mark,
You're right. I did not write it up in the lab notebook
and that is my fault. I thought of it. I thought it through. Just
didn't type it
in.
And, just for reminding me of that fact that it should be in the book, I
will spend
tomorrow doing one for a 1W. Your call. You want it with a digital
display or do
you want one with an audio frequency readout. Can't have both in one
day. :-)
You choose.
chuck, k7qo
On 6/27/19 6:59 PM, Mark Schoonover wrote:
Thanks for the quick response Chuck. Not sure where this lab notebook has
been all my life! It has a section on making enclosures out of PCB but
didn't see anything about Al enclosures. I'll check out Youtube when I have
time.
73! Mark KA6WKE
Website:
Live Stream:
YouTube Live!:
Author: 4NEC2 The Definitive Guide EMail List:: [email protected]
On Thu, Jun 27, 2019 at 6:40 PM chuck adams <chuck.adams.k7qo@...>
wrote:
I use 0.040" Al. I have section in the lab book and in some youtube
videos under K7QO.
I use a cheap Harbor Freight brake, also documented in both of the
above so that I don't want to take up much room here.
FYI
chuck, k7qo
On 6/27/19 4:26 PM, Mark Schoonover wrote:
Chuck!
What thickness of Al did you use? I take it you have a bending brake of
some sort?
73! Mark KA6WKE
|
Mark,
You're right.? I did not write it up in the lab notebook
and that is my fault.? I thought of it.? I thought it through. Just didn't type it
in.
And, just for reminding me of that fact that it should be in the book, I will spend
tomorrow doing one for a 1W.? Your call.? You want it with a digital display or do
you want one with an audio frequency readout.? Can't have both in one day.? :-)
You choose.
chuck, k7qo
toggle quoted message
Show quoted text
On 6/27/19 6:59 PM, Mark Schoonover wrote: Thanks for the quick response Chuck. Not sure where this lab notebook has
been all my life! It has a section on making enclosures out of PCB but
didn't see anything about Al enclosures. I'll check out Youtube when I have
time.
73! Mark KA6WKE
Website:
Live Stream:
YouTube Live!:
Author: 4NEC2 The Definitive Guide EMail List:: [email protected]
On Thu, Jun 27, 2019 at 6:40 PM chuck adams <chuck.adams.k7qo@...>
wrote:
I use 0.040" Al. I have section in the lab book and in some youtube
videos under K7QO.
I use a cheap Harbor Freight brake, also documented in both of the
above so that I don't want to take up much room here.
FYI
chuck, k7qo
On 6/27/19 4:26 PM, Mark Schoonover wrote:
Chuck!
What thickness of Al did you use? I take it you have a bending brake of
some sort?
73! Mark KA6WKE
|
Thanks for the quick response Chuck. Not sure where this lab notebook has been all my life! It has a section on making enclosures out of PCB but didn't see anything about Al enclosures. I'll check out Youtube when I have time. 73! Mark KA6WKE Website: Live Stream: YouTube Live!: Author: 4NEC2 The Definitive Guide EMail List:: [email protected]On Thu, Jun 27, 2019 at 6:40 PM chuck adams <chuck.adams.k7qo@...> wrote: I use 0.040" Al. I have section in the lab book and in some youtube
videos under K7QO.
I use a cheap Harbor Freight brake, also documented in both of the
above so that I don't want to take up much room here.
FYI
chuck, k7qo
On 6/27/19 4:26 PM, Mark Schoonover wrote:
Chuck!
What thickness of Al did you use? I take it you have a bending brake of
some sort?
73! Mark KA6WKE
|
I use 0.040" Al.? I have section in the lab book and in some youtube
videos under K7QO.
I use a cheap Harbor Freight brake, also documented in both of the
above so that I don't want to take up much room here.
FYI
chuck, k7qo
toggle quoted message
Show quoted text
On 6/27/19 4:26 PM, Mark Schoonover wrote: Chuck!
What thickness of Al did you use? I take it you have a bending brake of
some sort?
73! Mark KA6WKE
|
Re: Kits and Parts "Organic 5Watter" transceiver kit [long]
"Remember the QCX 5W monoband CW transceiver kit already contains a
synthesizer, rotary encoder and display - dual VFO, Split, RIT, memories,
messages... "
my QCX 20 is... touchy. I'm still going to need to try to get the receiver working right. Might have to redo T1.
I'm looking forward to making a 5Watt 20, my first Dizrig in many years. then I can compare them, head to head.
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J Ed
Lloyd K3ESE