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Re: 7 MHz Oscillator Ideas
OK, last time, I promise. Jerry and All, I?expect we've been thinking grapefruit and tangerines...related but not the same...8^) Varactors used to tune an entire?AM or FM band?with a max C of 350pF
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Chuck Carpenter
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#427
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Re: 2n2xx Transceiver R.I.P.
I am curious as to the possible substitution of the mini circuits ADE-1 with imported ADE-1-24 devices.? The look of the two seemed to be identical.? Has anyone found success with the latter??
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[email protected]
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#426
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Re: 2n2xx Transceiver R.I.P.
The Raduino used on the uBitx consists entirely of a 5v regulator, an Arduino Nano clone, an Si5351, and a standard 16x2 LCD with backlight. Power consumption is 40ma without the display, the display
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Jerry Gaffke
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#425
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Re: 2n2xx Transceiver R.I.P.
[email protected]> wrote: Ack! Not me! I have a day job :) Do you know what the power supply current requirements would be for the synthesizer, LCD and Arduino? I still marvel at my SW40+ that uses
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Michael Maiorana
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#424
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Re: For Sale: Norcal 40a
Sold.
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John AE5X
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#423
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Re: What level math is in the RF design books?
thank you
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Rob <roomberg@...>
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#422
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Re: 2n2xx Transceiver R.I.P.
I can see where Jim would rather not have us copy his gerbers, Hundreds of folks will know that he did the design, and a few will inevitably pester him for help. If stealing a significant part of the
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Jerry Gaffke
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#421
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Re: 7 MHz Oscillator Ideas
Chuck, I think we all agree that your design will be plenty stable. It is crystal controlled, going from zero to 12v on the bias for the varactor that is in parallel with the crystal can only move the
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Jerry Gaffke
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#420
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Re: 2n2xx Transceiver R.I.P.
Agreed Mike.? Good to hear from you again.? Jim just doesn't want a mass distribution.? Note that he encourages builders to make their "OWN PCB".? I agree that it was an amazing design.? Jim is
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Doug Hendricks
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#419
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Re: 2n2xx Transceiver R.I.P.
Rob there is no problem with anyone making their own board for their own use, it is the distribution of those boards that is the thing that I object to.? Jim does not want to not does he have the
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Doug Hendricks
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#418
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Re: 2n2xx Transceiver R.I.P.
The use of ADE-1 (or SBL-1) diode ring mixers make it possible for the receiver to have a very large dynamic range.? It also makes it possible for the receiver to suck down the battery much more
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Jerry Gaffke
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#417
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Re: 7 MHz Oscillator Ideas
Nick, I've made some measurements using the?SA612?oscillator in my WWV +?30m receiver. The crystal is a single, 10 MHz nominal.? Keep in mind that this is a simple DC receiver and may not meet the
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Chuck Carpenter
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#416
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Re: What level math is in the RF design books?
Rob -- If you have a copy of "Experimental Methods of RF Design", take a look at chapter 2 "Amplifier Design Basics", first few pages, which discusses simplified models of semiconductor devices. I
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Ramakrishnan Muthukrishnan
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#415
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Re: 2n2xx Transceiver R.I.P.
Doug, From Jim's email on November 10th: Finally, all of the documentation for the 2N2/XX is on my web site: www.k8iqy.com ( http://www.k8iqy.com ) so you can get the docs, build any of the 3 bands
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Michael Maiorana
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#414
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Re: 2n2xx Transceiver R.I.P.
OK..no problem. My point of view was that it is a well documented hands on DIY project transceiver worthy of hand crafting for yourself..... not any money making ventures.... and since I learned how
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Rob <roomberg@...>
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#413
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Re: 2n2xx Transceiver R.I.P.
Rob, the 2N22 is the intellectual property of Jim Kortge.? He has asked that it not be made available.? Please honor his wishes and stop promoting this project.? It would be wrong for anyone to
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Doug Hendricks
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#412
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Re: 2n2xx Transceiver R.I.P.
NO WAY The project is only dead if you want to leave it resting. All of the wealth of documentation is there to make the 2n2xx tranceiver on ANY base you want... island pads... manhatten ... or PRINT
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Rob <roomberg@...>
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#411
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Re: 2n2xx Transceiver
The designer has voiced he does not want to offer a board.? The project is dead. Lee, w0vt
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Leland L. Bahr
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#410
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Re: 2n2xx Transceiver
i would like (at least) one jerry aa1of franconia nh
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ohwenzelph
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#409
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Re: 2n2xx Transceiver
Steve, if the Chinese wanted to copy it, they would do it gerbers or no. If I were the designer, I would be more concerned about having to support the builders if I produced new boards. One way around
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Dale Hardin KS4NS
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#408
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