Re: RF cal club?
[email protected]> wrote: Why would you bother trimming? As long as a value is known, it doesn¡¯t matter if it¡¯s 10 uF or 10.16 uF. What is important is stability. It's not to the standard I had
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Dr. David Kirkby, Kirkby Microwave Ltd
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#2041
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Re: RF cal club?
These do not like being fed more than 10 V. Here's a 1000 trace average at 1 dB/div with 10.06 V according to the PSU display. And another display at 12 V 500 trace average. The output MMICs need a
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Reginald Beardsley
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#2040
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Re: Does anyone have any experience with these log detectors?
Reg, When I worked on Marine radios in the 1970's many problems was caused by problems with the antenna installation. That timeframe corresponded to the transition of Marine communications from the
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Mike N2MS
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#2039
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Re: Does anyone have any experience with these log detectors?
Eric, Thanks for the advice. I have been testing out with radio in the SSB mode and the peak power corresponds with the readings I get using an oscilloscope. I constructed a 40dB power attenuator and
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Mike N2MS
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#2038
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Re: RF cal club?
The voltage and resistance requirements for RF are adequately met by more economical standards, e.g. LM399 and some 20 ppm resistors. Crazy not to include them. The CTI OXCOs are within a few ppb in
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Reginald Beardsley
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#2037
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Re: Looking for a 12v DPDT Relay for at Antenna switching
The relay almost everyone uses in all the QRO switches is a Schrack?RT424012. Available everywhere for $4. Gary NA6O
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Gary Johnson
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#2036
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Re: RF cal club?
The purpose of the "cal club" is to improve the ability to have accurate references or do accurate measurements in the RF domain What not to include: voltage references and resistors. These are
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Erik Kaashoek
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#2035
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Looking for a 12v DPDT Relay for at Antenna switching
I want to to do A/B testing with different amps driving my feedline and just a transformer. I want a long lasting relay that will hold up in my outdoor enclosure. I want a 12V DPDT relay. I'd like to
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Mikek
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#2034
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Re: RF cal club?
Hey I'm up in Aberdeen, and I have access to a Fluke 8588A (8.5 DMM) as well as quite a few 6.5/7.5 DMMs. I have some old GenRad standard inductors and capacitors for low frequency stuff, as well as a
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Marcus Bannerman
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#2033
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Re: RF cal club?
I'd be interested in joining (London, UK). Interested in frequency domain things, but I don't have a whole lot to contribute that's portable - - a Marconi 6910 10MHz-20GHz power sensor (calibration
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Patrick Coleman
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#2032
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Re: RF cal club?
Hi, wifey and me would fly in. Tam With best regards Tam HANNA -- Enjoy electronics, 3D printing and cigars? Join more than 21000 followers on my Instagram athttp://www.instagram.com/tam.hanna
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Tam Hanna
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#2031
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Re: RF cal club?
geoffsmithoz@...> wrote: I don¡¯t wish to create any subgroups. Dave (group owner)
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Dr. David Kirkby, Kirkby Microwave Ltd
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#2030
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Re: RF cal club?
Sounds good, Can it be a "sub group" -- Regards, *Geoffrey Smith* *_EMAIL ADDRESS_*use**geoffsmithoz@...** *geoffsmithoz@...*.Is no longer working** *_Delivery / Physical
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Geoffrey Smith
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#2029
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Re: RF cal club?
I'd like to suggest an EMF camp project. Create a PCB with a set of SMD binary step capacitor pairs such that the preceding 2 can be paralleled to adjust the next step. Have them made with the
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Reginald Beardsley
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#2028
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Re: RF cal club?
Meant to add I can probably provide SMA and N SOL near metrology grade cal kits that have had the cal data/factors lost. If someone wanted to cal them against a know good get to get the data, that
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bownes
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#2027
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Re: RF cal club?
Here in New England we are blessed to have the nice folks from R&S come with their latest high end test equipment to our Microwave Update conference and its Northeast equivalent so we can all test the
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bownes
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#2026
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Re: RF cal club?
We've wondered before about getting some standards (hired or borrowed) at EMF Camp https://www.emfcamp.org/ The thought from the camp organisers was that hiring wouldn't be justified by the usage (and
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Adrian Godwin
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#2025
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Re: RF cal club?
Tom et al, May I suggest to arrange a meeting room at a restaurant or hotel for a day once a year and everyone bring their cal standards. With a strong turnout, NPL might do the honors. Such an event
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Reginald Beardsley
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#2024
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Re: RF cal club?
May I suggest ordering some of these from JCLPCB? https://oshpark.com/shared_projects/PzvtIxv4 I have 3x of these: https://oshpark.com/shared_projects/DMMaC4j1 which Jason sent me. I also have 10x
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Reginald Beardsley
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#2023
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Re: RF cal club?
ref in a box some time back but have not checked it's tempco yet. It is about 20mm thick, so it might go as a large letter. transfer standard. But it would be very good to get a UK cal group together,
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Tom Gardner
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#2022
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