SolderSmoke DCR The Joy of Oscillation
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- Опубліковано 15 жов 2024
- Recently, Bill N2CQR of the SolderSmoke podcast and blog, has been working on a Direct Conversion receiver project with Dean KK4DAS to be used as a High School Direct Conversion Receiver Project (here: soldersmoke.blo... ). Bill asked for others to build the DC receiver to help in testing; so as a result, I have begun reproducing the receiver. So far the only module I have completed is the PTO (Permeability Tuned Oscillator) a.k.a. VFO and/or L.O. My build of the project is modular, and I have not made any changes to Bill and Dean's published design other than some very minor component value changes to match what I had in my junk-box, and the addition of an extra bypass capacitor here and there to support my modular layouts. Here in this video I connected the SolderSmoke-DCR's PTO to a 27 MHz oscillator and mixer I had available since I have not yet assembled the SolderSmoke-DCR's mixer. The test consisted of mixing 7.250 MHz with 27.218 MHz resulting in two frequencies 19.968 MHz and 34.468 MHz.
Schematic:
www.remmepark.c...
Project page:
www.remmepark.c...
73 - Rick - N3FJZ.
Well done on responding to the Call for Builders! Sounds like every free running VFO I've ever built, wild and free spirited!
Paul, I like the way you put it; "...free spirited...", that's so on the mark. I've been spoiled with the Si5351 :-) Thanks
Well done Rick. That's some proper homebrewing on display. All the best with the rest of the build. 73 Nick M0NTV
Thank you Nick, Love your builds, keep up the good work. We all learn from each other, and you (and all the other homebrewers) are a big inspiration for me. Thank you!
Impressive 👍
Thank you
I used to have notes to make the terminal strips out of perf and wire. Can't find them and Google is no help. Duck Duck wasn't either but it did show me the seller of the VU meters I've been looking for.
Quick question, what did you use to draw the parts placement section?
Here's a link on how I do it; however I simplified the design where I changed the lower wires (that solder to the board) to be simple loops (like the top ones) and I bend the loops on both the top and bottom to 90 degrees (if the loops stand straight up, the solder runs down too easily). Here's the link: www.remmepark.com/circuit6040/term_strip/term_strip.html
I use TurboCAD for the layout and Microsoft Paint for the schematics where I just draw the elemental components as blocks and move them around manually, and for MS Paint, I cut-and-paste at the pixel level (as if the drawing was paper), there is no automation; e.g. wires don't stretch when you move a component, et cetera. I trained to be a draftsman back in high school (where actual paper and pencils were used) and have been using CAD systems since the mid 90's and find it more enjoyable (as a hobby) to draw like it's 1972 :-) I would not recommend this method unless you want to do it manually, the better choice would probably be the (free?) automated schematic capture / PCB layout tools, with the side benefit being that you could also have circuit boards made from your efforts. I thought about it using a PCB layout tool, and I used PCB layout systems on the job early on, but I like the visual results I get doing it manually.
73
@@Circuit6040 Thanks for the link, it was the one I was looking for. For component style layouts and Manhattan boards I've been using DIYLC (diy layout creator). Free multi-platform and very popular with the effects pedals crowd.
@@Pixelwaster Thanks for the tip about DIYLC, something I'll definitely be checking out.