Re: V2 and V3 roadmap
6ggz?
By
aleks07111971@...
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#20175
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Re: V2 and V3 roadmap
But if you were asking about V2N and V2N4, those were renamed to V2 plus and V2 plus4 and have been available since October of last year.
By
OwO
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#20174
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Re: MORE CMC SINGLE CORE DATA
Manfred:
We're not too far from Salt Lake City, Utah as far as shipping goes. I
remember as a kid coming into this hobby some 50 to 60 years ago, I'd put
together an order to Allied (on a paper
By
W0LEV
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#20172
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Greetings from a new user
Just want to say hello and thank you, my new NanoVNA will be delivered later today. I have learned a lot about it's use already by downloading (and reading) the absolute beginners guide. I see so
By
Jim Altman, W4UCK
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#20171
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Re: [nanovna-f] EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
In my suburban? location, the noise level on 80m and 40m is quite high and puts the AGC circuit into a non-linear range. rather than using a pre-amp, I use a 24dB attenuator which drops the noise
By
geoff M0ORE
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#20170
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Re: V2 and V3 roadmap
Hugen 6ggz
By
aleks07111971@...
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#20169
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Re: V2 and V3 roadmap
Hi Owo, any further updates on the new products mentioned at the beginning of this thread?
Thanks!
By
Pomology
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#20168
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Re: Balun's in Series...
I found the reference in the Cookbook.
Thanks!
--
Mike, W0IH
By
Michael Foerster
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#20167
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Re: MORE CMC SINGLE CORE DATA
Dave,
I'm green with envy! When I order something, I have to wait one month, AT LEAST, for it to arrive... That's the time it is retained by customs in my country. If they actually pick the parcel
By
Manfred Mornhinweg
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#20166
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Re: MORE CMC SINGLE CORE DATA
Don't blindly trust that presentation! It contains serious errors!
For example, it claims that when you take an air-core inductor and insert an iron core, the inductance will rise in direct
By
Manfred Mornhinweg
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#20165
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Re: MORE CMC SINGLE CORE DATA
Mark,
Are you maybe thinking about clever businessmen who sell $1000 copper-free, super-low-distortion power cables to HiFi fans?
Or were you thinking about companies that sell $300 professional,
By
Manfred Mornhinweg
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#20164
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Re: Balun's in Series...
It's common practise so yes: http://k9yc.com/2018Cookbook.pdf
By
Dragan Milivojevic
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#20163
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Balun's in Series...
I've been reading the comments recently on using CMC baluns on antenna systems and I too am a firm believer in using them. I've seen my noise level go down considerably in my semi-urban location.
By
Michael Foerster
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#20162
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Re: EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
OOOOOooops.......RIGHT MOST ENTRY in the table......
Dave
wrote:
By
W0LEV
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#20161
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Re: EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
I'll include a few pictures of the choke I used for the on-the-air (S+N)/N
short experiment. I'll also attach the table of measurements in which this
choke is the left-most entry.
Again, the CMC is
By
W0LEV
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#20160
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Re: MORE CMC SINGLE CORE DATA
Here is an excellent starter with nothing more than algebra required:
https://www.ieee.li/pdf/viewgraphs/fundamentals_magnetics_design.pdf
Dave - W?LEV
By
W0LEV
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#20159
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Re: EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
Dave,
I very much appreciate your work on CMCs. I have a similar antenna to yours (four half waves in phase called a Frankin Antenna fed from a balanced tuner with 430 ohm ladder line. Like Joe,
By
Floyd Hollister
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#20158
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Re: EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
In the example of the benefits of using a CMC or true balun, I used two
stacked cores of 31 material with an OD of 2.4". I wound 18 turns of AWG
#12 enamelled solid copper wire in bifilar manner with
By
W0LEV
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#20157
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Re: [nanovna-f] EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
If one reads the small amount of verbiage which I started with, you would
already know I turned on preamp 1 ONLY to raise the level of noise shown on
the waterfall. I have that adjusted for normal
By
W0LEV
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#20156
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Re: [nanovna-f] EFFECT OF CMCs and/or BALUNS on RECEIVED NOISE
What I meant is that noise or signal level does not change. It is a fieldstrength outside your transceiver.
Switching on a preamp makes signals more audible (sometimes) but still, then EM
By
Arie Kleingeld PA3A
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#20155
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