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Re: Digi-key
I looked forward to Doug Demaw¡¯s articles. I built a two band version of the progressive communications receiver from about 1981. I remember how impressed I was that the direct conversion part
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Tech Guy
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#9459
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Re: Digi-key
Alas, I yearn for the [late] 70s when I semi-accidentally subscribed to Wayne Green's 73 Magazine. From 1977 through the early 80s, each magazine was chock full of projects, tech articles, and general
By
k6whp
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#9458
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New single band superheterodyne transceiver
Here's my latest rig (see pic below). It is a 10 Watt PEP single conversion transceiver using 6 printed circuit boards in a copper clad PCB enclosure. I've been having a lot of fun talking to my
By
hwstar
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#9457
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Edited
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Re: Digi-key
That's from the time when there was a variety of different radio and electronics publications, all containing plenty of construction articles. You could walk into the magazine section of any good
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Dave AA7EE
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#9456
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Re: Earliest example of Manhattan construction?
That's interesting Nick. He even acknowledges the small amount of extra capacitance that this technique introduces, between the pads and the board.
Dave
AA7EE
By
Dave AA7EE
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#9455
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Re: SolderSmoke DC Receiver Challenge
For the folks who built the soldersmoke dc receiver, which pto coil form
did you print? I have some cycles on a nice 3d printer so I'd like to make
one. Thanks!
73
Mike M Ku4qo
>
By
Michael Maiorana
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#9454
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Re: LT Spice Alternatives
I went down the alternate road a while back and found QucsStudio (uSimmics). https://qucsstudio.de/
The neat part is the tunable parameters section, change your L&C's on the fly with the sliders and
By
John Clements
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#9453
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Re: LT Spice Alternatives
I think I mentioned in the video that the Mac and the Windows version of LTspice are very different when it comes to the user interface. I am a Mac user as well, but I miss some of the features that
By
Karl Heinz Kremer - K5KHK
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#9452
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Re: Earliest example of Manhattan construction?
I thought of this thread when I found something in my notes headed "Birth of Manhattan Style?". It was in reference to a QST article of May? 1972 called "Some 2-meter solid-state RF power amplifier
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Nick Kennedy
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#9451
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Re: Digi-key
Wow, great issue. I was going to try to track down that legendary keyer
but you saved me the trouble. I'd recently been researching early keyer
designs while I was engaged in my Accu-Keyer project,
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Nick Kennedy
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#9450
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Re: Digi-key
Tumbling down the digi-key internet rabbit hole - I came across the April 1968 edition of QST which featured the digi-key keyer.?
By
Gerald Wolczanski
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#9449
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Re: Digi-key
Digi-Key's first product was a digitial CW keyer: https://www.digikey.com/en/resources/ham-radio/ham-radio.
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Dan Romanchik KB6NU
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#9448
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Re: LT Spice Alternatives
Karl,
Thanks for sharing you video. I looked at Spice many years ago and found it too confusing. Your video inspired me to take another look, so I downloaded the LT to my Mac.
When I started and
By
Newt N4EWT
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#9447
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Re: LT Spice Alternatives
Nick,
The problems I was having were, as I mentioned, getting LT Spice to "properly" display/plotting of a filter. Ironically,? the video that Karl made directly addressed the LPF I was working on.
By
k6whp
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#9446
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f_T fixture and cheap transistors [long]
Gang,
1.? First of all you are going to need something like the
following RF probe to measure the output of the f_T
tester we have been discussing in previous posts.
There are a lot of RF probes
By
chuck adams
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#9445
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QRPBuilder at FDIM
Gang,
The QRPBuilder magnetically attached Iambic and Single lever Paddles are now back in stock. Also, this will be our fifth year at the Dayton FDIM vendor night on Thursday May 15, with all our
By
Ken wa4mnt
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#9444
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Digi-key
Nice piece this morning on NPR regarding Digi-Key.
https://www.npr.org/2025/04/24/nx-s1-5332209/digikey-tariff-small-minnesota-town-big-company
I didn't know it was started by a ham
By
Gerald Wolczanski
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#9443
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Re: cheap aliexpress LC100a = $13 paperweight?
Thanks Stephen.? Doug posting that article yesterday is what got me leaning toward fix it and keep it.? Seeing it again has pushed me 99% over the fence.
By
Doug W
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#9442
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Re: cheap aliexpress LC100a = $13 paperweight?
Thanks Mike.? Do you remember what you replaced L1 with?? The more I read it looks like the less the value matters.? I now have a folder full of different cal routines and will probably try them
By
Doug W
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#9441
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Re: cheap aliexpress LC100a = $13 paperweight?
Here is an article on how to improve the LC100A.
https://ludens.cl/Electron/LC100A/LC100A.html
[email protected]> wrote:
By
Stephen Tremblay
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#9440
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