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Attn Bayou Jumper Spy operators
Here in central South Carolina, KPH was S9 all afternoon on 17016.8 kc. The receiver (IC7610) has a built-in recorder, which served the same purpose as Jim’s iPhone! My backup plan was a web SDR on th
Here in central South Carolina, KPH was S9 all afternoon on 17016.8 kc. The receiver (IC7610) has a built-in recorder, which served the same purpose as Jim’s iPhone! My backup plan was a web SDR on th
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WA4EFS
· #27072
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Hilltopper 20 Low Power Out
FWIW, I recently measured the output of a Hilltopper in order to calibrate a QRP SWR bridge. Power supply VDC P-P RF voltage (50-ohm resistive load) 9 36 12 42 13.8 46 -Lloyd (wa4efs)
FWIW, I recently measured the output of a Hilltopper in order to calibrate a QRP SWR bridge. Power supply VDC P-P RF voltage (50-ohm resistive load) 9 36 12 42 13.8 46 -Lloyd (wa4efs)
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WA4EFS
· #26979
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Capacitor ID
The marking on your attached image looks like 10J, which would be 10 pF, 5%, not .01 μF.
The marking on your attached image looks like 10J, which would be 10 pF, 5%, not .01 μF.
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WA4EFS
· #26539
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40 and 80 Meter CW Nets
Thanks Steve. Surely one of the benefits of kit building—besides learning about toroid winding—must be in the ideas they suggest for other projects. At least that has been so in my experience. Good lu
Thanks Steve. Surely one of the benefits of kit building—besides learning about toroid winding—must be in the ideas they suggest for other projects. At least that has been so in my experience. Good lu
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WA4EFS
· #26143
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40 and 80 Meter CW Nets
Nice photo. Do you have a write-up somewhere? 73, -Lloyd (WA4EFS)
Nice photo. Do you have a write-up somewhere? 73, -Lloyd (WA4EFS)
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WA4EFS
· #26123
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Programming Arduino proc in Hilltopper-20
The Hilltopper 20’s J5 connects to the MPU’s Tx, Rx, and reset pins. You can connect to J5 from an UNO board’s DIO 0, 1, ground and reset or alternatively using a USB-FTDI cable, but you do need the r
The Hilltopper 20’s J5 connects to the MPU’s Tx, Rx, and reset pins. You can connect to J5 from an UNO board’s DIO 0, 1, ground and reset or alternatively using a USB-FTDI cable, but you do need the r
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WA4EFS
· #26011
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Coil forms, Q, and instruments
Thank you Jim N5IB and Jim Sheldon.. Inspired by your examples I returned to the struggle and finally figured out how to do a parameterized coil form in FreeCAD. Whew! The point about the CPU demand o
Thank you Jim N5IB and Jim Sheldon.. Inspired by your examples I returned to the struggle and finally figured out how to do a parameterized coil form in FreeCAD. Whew! The point about the CPU demand o
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WA4EFS
· #24991
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Coil forms, Q, and instruments
Hello Jim. Very nice work on the coil form. I test printed your .stl file and it came out perfectly. If you don't mind my asking which CAD application do you use? Some time ago I attempted a similar p
Hello Jim. Very nice work on the coil form. I test printed your .stl file and it came out perfectly. If you don't mind my asking which CAD application do you use? Some time ago I attempted a similar p
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WA4EFS
· #24963
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Freq Mite Frequency Counter
The schematic for the 4SQRP Freq Mite kit solved a puzzle for me, namely how to boost a small Hi-Z input voltage to a robust 5 volts in order to drive a counter or etc., without loading the source. St
The schematic for the 4SQRP Freq Mite kit solved a puzzle for me, namely how to boost a small Hi-Z input voltage to a robust 5 volts in order to drive a counter or etc., without loading the source. St
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WA4EFS
· #24071
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What Kit's would be nice for 2021 and SSS reminder
Hilarious! And the filament voltage won't kill you.
Hilarious! And the filament voltage won't kill you.
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WA4EFS
· #23500
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K8IQY Stand Alone VXO Problem
Another similar suggestion. Amazon sells what they call a multifunction tester (range $10 - $15). These amazing devices display the schematic symbol of the part as well as its value. If you test a mol
Another similar suggestion. Amazon sells what they call a multifunction tester (range $10 - $15). These amazing devices display the schematic symbol of the part as well as its value. If you test a mol
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WA4EFS
· #23361
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What's On Your Bench?
Very nice indeed. If you don't mind my asking, where did you get the plate transformer? -Lloyd (WA4EFS)
Very nice indeed. If you don't mind my asking, where did you get the plate transformer? -Lloyd (WA4EFS)
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WA4EFS
· #23058
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Of interest, a "paraset" connection
I have also read the book. It is very good.
I have also read the book. It is very good.
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WA4EFS
· #22386
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3D printing
Some time ago I posted an illustrated story about my personal introduction to 3D printing at https://lloydm.net/Demos/threeD.html. As to where to put the printer in a house that has no room.. How abou
Some time ago I posted an illustrated story about my personal introduction to 3D printing at https://lloydm.net/Demos/threeD.html. As to where to put the printer in a house that has no room.. How abou
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WA4EFS
· #21538
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3D Printing
Beautiful! Which CAD software do you use/prefer? 73, -Lloyd (WA4EFS)
Beautiful! Which CAD software do you use/prefer? 73, -Lloyd (WA4EFS)
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WA4EFS
· #20698
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Cryptographic signatures
Just so everyone knows, if a messages starts with “Dearest, …” it’s not from me! J Lloyd (WA4EFS)
Just so everyone knows, if a messages starts with “Dearest, …” it’s not from me! J Lloyd (WA4EFS)
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WA4EFS
· #20087
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3D Printing
Thanks to all who have described experiences with 3D printing (and wishes)—lot’s to think about but not an easy decision! 73, -Lloyd (WA4EFS) …
Thanks to all who have described experiences with 3D printing (and wishes)—lot’s to think about but not an easy decision! 73, -Lloyd (WA4EFS) …
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WA4EFS
· #20003
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3D Printing
To those who have used a 3D printer to fabricate panels or other accessories – Please share your experience, including printer make/model, ease of use, quality of output, etc. Thank you, -Lloyd (WA4EF
To those who have used a 3D printer to fabricate panels or other accessories – Please share your experience, including printer make/model, ease of use, quality of output, etc. Thank you, -Lloyd (WA4EF
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WA4EFS
· #19983
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Success! My Hilltopper 20
Take comfort in having been spotted by K7 and VE6 (http://www.reversebeacon.net/index.php). 73, -Lloyd
Take comfort in having been spotted by K7 and VE6 (http://www.reversebeacon.net/index.php). 73, -Lloyd
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WA4EFS
· #19212
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