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Another Smith Chart Question
Hi folks
Andy's useful link to the very nice Smith cart has prompted a question.
Probably a stupid question.
Using my very limited skills in RF design, I am trying to design a
2.7GHz amplifier for a
Hi folks
Andy's useful link to the very nice Smith cart has prompted a question.
Probably a stupid question.
Using my very limited skills in RF design, I am trying to design a
2.7GHz amplifier for a
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By
Martyn Kinder <martyn@...>
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#14175
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Re: LPF for 3.5 GHz?
Hi all ,
Hello mon ami François , and the other guys here. I have been told , 2
days ago , by a cleaver guy , that it is possible to buy directly with
credit card from Minicircuit UK , ask for
Hi all ,
Hello mon ami François , and the other guys here. I have been told , 2
days ago , by a cleaver guy , that it is possible to buy directly with
credit card from Minicircuit UK , ask for
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By
F6DRO
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#14174
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Re: LPF for 3.5 GHz?
Hello Sorry I don't have the answer to yourquestion.
but I have quite the same need : built a 1Ghzpassband on a piece of FR4 !
Like you, there is no problem to get printedcircuit, my question is :
Is
Hello Sorry I don't have the answer to yourquestion.
but I have quite the same need : built a 1Ghzpassband on a piece of FR4 !
Like you, there is no problem to get printedcircuit, my question is :
Is
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By
F1CHF
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#14173
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Re: LPF for 3.5 GHz?
There will be a large markup if it is.
How about building a diplexer? Is it possible at 3.5 GHz? Also somemodamps tend to lose gain rapidly above 3 GHz so you might be able to takeadvantage of
There will be a large markup if it is.
How about building a diplexer? Is it possible at 3.5 GHz? Also somemodamps tend to lose gain rapidly above 3 GHz so you might be able to takeadvantage of
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By
Willis, MJ (Michael) <m.j.willis@...>
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#14172
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Re: LPF for 3.5 GHz?
Hello Daniel
The Spanish distributor for MiniCircuits is Ibercom <http://www.ibercom.net/>.
I don't know if that's useful...
Vy 73
Chris
GW4DGU
Hello Daniel
The Spanish distributor for MiniCircuits is Ibercom <http://www.ibercom.net/>.
I don't know if that's useful...
Vy 73
Chris
GW4DGU
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By
Chris Bartram <yahoo@...>
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#14171
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Re: LPF for 3.5 GHz?
Hello Grant,
unfortunately purchasing components from minicircuits is very costly
from Germany as there is no distribution for small quantities.
I would have to order from the States and the cost of
Hello Grant,
unfortunately purchasing components from minicircuits is very costly
from Germany as there is no distribution for small quantities.
I would have to order from the States and the cost of
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By
eai3ld <dako_ger@...>
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#14170
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Re: Use of attenuators
Richard
Assuming the coupler is SMA, you can get an idea byputting the best load you have ( I think 1 had about 27dB retloss)
If the value you observe is near the known loadreturn loss (written on it
Richard
Assuming the coupler is SMA, you can get an idea byputting the best load you have ( I think 1 had about 27dB retloss)
If the value you observe is near the known loadreturn loss (written on it
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By
Mark GM4ISM <gm4ism@...>
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#14169
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Use of attenuators
I have just received some microwave attenuators - good old ebay. The
values are 6/6/11/13/15dB. In use I wonder if there is any advantage
in using them in a particular order? For example in a
I have just received some microwave attenuators - good old ebay. The
values are 6/6/11/13/15dB. In use I wonder if there is any advantage
in using them in a particular order? For example in a
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By
Richard Newstead <g3cwi@...>
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#14168
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Re: In praise of Fruit Flies
Nice poem Richard !
All this hill topping takes me back to the early 10GHz narrowband days in the late 70s .The thought of all those Alpine people on speed does seem a tad alarming ?
You can get
Nice poem Richard !
All this hill topping takes me back to the early 10GHz narrowband days in the late 70s .The thought of all those Alpine people on speed does seem a tad alarming ?
You can get
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By
JFELL@...
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#14166
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Re: LPF for 3.5 GHz?
Daniel
The LFCN-3400 from Mini-Circuits should do the job.
Loses in 0.8mm FR4 at 3.5GHz might not be as bad as you think, especially if the track lengths are kept as short as possible. I've used
Daniel
The LFCN-3400 from Mini-Circuits should do the job.
Loses in 0.8mm FR4 at 3.5GHz might not be as bad as you think, especially if the track lengths are kept as short as possible. I've used
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By
Grant Hodgson <grant@...>
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#14167
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LPF for 3.5 GHz?
Hi all,
I am building a tracking generator for my Advantest R4131 spectrum
analyzer and need a low-paas filter with a cut-off frequency of
around 3.5GHz. The filter should be reasonably steep. I do
Hi all,
I am building a tracking generator for my Advantest R4131 spectrum
analyzer and need a low-paas filter with a cut-off frequency of
around 3.5GHz. The filter should be reasonably steep. I do
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By
eai3ld <eai3ld@...>
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#14165
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Re: IO73
Dear All
After back-calculating I have moved my 10G activity time on Snowdon
to 10:45 on Sunday. It was not looking practical to get there by
0930. The WX is currently forecast is for light showers.
Dear All
After back-calculating I have moved my 10G activity time on Snowdon
to 10:45 on Sunday. It was not looking practical to get there by
0930. The WX is currently forecast is for light showers.
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By
Richard Newstead <g3cwi@...>
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#14164
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Re: 24GHz
I have been following the thread with interest and make the following
observations.
The good conditions at the weekend/ Monday were as a result of the
formation of a duct under high pressure
I have been following the thread with interest and make the following
observations.
The good conditions at the weekend/ Monday were as a result of the
formation of a duct under high pressure
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By
g0ewn191 <g0ewn191@...>
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#14161
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Re: IO73
Thanks Mike, much appreciated.
I will endeavor to leave my 4x 44el's beaming IO73 and the rig on
1297.500 FM in the hope of a contact at the weekend.
73 Ray GM4CXM
IO75TW
150w available but will be
Thanks Mike, much appreciated.
I will endeavor to leave my 4x 44el's beaming IO73 and the rig on
1297.500 FM in the hope of a contact at the weekend.
73 Ray GM4CXM
IO75TW
150w available but will be
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By
Ray <gm4cxm@...>
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#14160
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10 GHz testing next saturday
Hello,
Next saturday afternoon I hope to do some testing on 3 cm with my new
setup.
The locator will probably be JO20ss or as an alternative JO20mw.
I'll be using 3W and 70 cm prime focus dish.
I
Hello,
Next saturday afternoon I hope to do some testing on 3 cm with my new
setup.
The locator will probably be JO20ss or as an alternative JO20mw.
I'll be using 3W and 70 cm prime focus dish.
I
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By
bart_ghz <shf2@...>
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#14159
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Re: Smith chart
Nice one Andy, It prints very cleanly from thePDF.
73, Mike
Nice one Andy, It prints very cleanly from thePDF.
73, Mike
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By
Michael Scott
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#14158
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In praise of Fruit Flies
Geneticists like fruit flies. Their short lifespan allows genetic
variation to be studied in relative short time periods. In much the
same way, my microwave system has developed rapidly having
Geneticists like fruit flies. Their short lifespan allows genetic
variation to be studied in relative short time periods. In much the
same way, my microwave system has developed rapidly having
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By
Richard Newstead <g3cwi@...>
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#14157
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Re: Smith chart
Seconded!
Regards, Mike, G3PFR
Seconded!
Regards, Mike, G3PFR
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By
mikeg3pfr@...
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#14163
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Re: In praise of Fruit Flies
Thanks, Richard - yes, very interesting, as it changes the face oflightweight microwave operation in a way which was not previously possible. Keepup the good work - you have certainly stirred up some
Thanks, Richard - yes, very interesting, as it changes the face oflightweight microwave operation in a way which was not previously possible. Keepup the good work - you have certainly stirred up some
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By
mikeg3pfr@...
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#14162
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Re: Scatterpoint Feb 2008
By
Andy Talbot <andy.g4jnt@...>
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#14156
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