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QRPGuys DSB xcvr

 

Gang,

Been there. Done that.

Attached are three photographs and below is log for the first few
contacts made with the following:

o Raspberry Pi 4 in 3D printed enclosure with 40mm fan. Found 30mm
fans to be too loud.

o Enclosure from . Let me
know if you figure out how to do without it being solid like mine.
I'm no expert on 3D printing with my Ender 3 printer.

o USB sound module from . Paid the $2
extra to get vendor from ebay in USA so that I did not have to wait
on the slow boat. $3.95 today, Oct 3 2019, and let's see if the vendor
does the usual ebay stuff of running the price up if there is a run on
the critter.

o Using Raspbian Buster Full version for O/S from raspberrypi.org
downloads page.

o WSJT-X V2.1 from

using the armhf.deb version of Version 2.1.0 in the installation
packages section of the web page.

K7QO log for 20m at 1W or less. I recommend you not run too much
more than this or you will be distortion by over driving the audio
section. Your mileage may vary.

2019-09-27,15:58:30,2019-09-27,16:03:19,WW5XX,EL09,14.075346,FT8,-14,-12,1.0,,
2019-09-27,18:02:00,2019-09-27,18:03:30,KQ6CA,CN87,14.075352,FT8,-02,-15,,,
2019-09-27,18:09:45,2019-09-27,18:11:15,KD5FOY,EM12,14.074410,FT8,+08,-15,,,
2019-09-27,18:33:30,2019-09-27,18:34:30,WF3P,FN20,14.074632,FT8,-06,-15,,,
2019-09-27,18:35:09,2019-09-27,18:35:19,WF3P,FN20,14.074632,FT8,-06,-15,,,
2019-09-27,18:54:00,2019-09-27,18:55:30,KJ7COA,CN88,14.074925,FT8,+02,-15,,,
2019-09-27,19:15:00,2019-09-27,19:16:31,K9ZW,EN64,14.075022,FT8,-12,-23,,,
2019-09-27,19:32:30,2019-09-27,19:34:00,AE4CC,EM13,14.075307,FT8,-04,-20,,,
2019-09-27,21:00:45,2019-09-27,21:03:15,K2AMF,DN17,14.074838,FT8,-07,-17,,,
2019-09-27,21:42:15,2019-09-27,21:43:45,ND6H,CM97,14.074576,FT8,-11,-24,,,
2019-09-28,00:13:00,2019-09-28,00:16:00,NE8O,EN83,14.075104,FT8,-10,-16,,,


I have put the rig in storage for a while due to more pressing projects
for the RPi4.4 course (K7QO YouTube.com channel) and more than 60
physics programs that I have written in the last 20 years and not
published yet, so gotta get that done before they go to the landfill
with the rest of the estate.

FYI

chuck, k7qo, beta tester

p9270001.jpg
p9270002.jpg
p9270003.jpg

JT Croteau
 

Chuck, good job. Now we just need a 3D designed case for the DSB Xcvr. *grin*

N1ESE

On Wed, Oct 2, 2019 at 11:54 AM chuck adams <chuck.adams.k7qo@...> wrote:

Gang,

Been there. Done that.

Attached are three photographs and below is log for the first few
contacts made with the following:

o Raspberry Pi 4 in 3D printed enclosure with 40mm fan. Found 30mm
fans to be too loud.

o Enclosure from . Let me
know if you figure out how to do without it being solid like mine.
I'm no expert on 3D printing with my Ender 3 printer.

o USB sound module from . Paid the $2
extra to get vendor from ebay in USA so that I did not have to wait
on the slow boat. $3.95 today, Oct 3 2019, and let's see if the vendor
does the usual ebay stuff of running the price up if there is a run on
the critter.

o Using Raspbian Buster Full version for O/S from raspberrypi.org
downloads page.

o WSJT-X V2.1 from

using the armhf.deb version of Version 2.1.0 in the installation
packages section of the web page.

K7QO log for 20m at 1W or less. I recommend you not run too much
more than this or you will be distortion by over driving the audio
section. Your mileage may vary.

2019-09-27,15:58:30,2019-09-27,16:03:19,WW5XX,EL09,14.075346,FT8,-14,-12,1.0,,
2019-09-27,18:02:00,2019-09-27,18:03:30,KQ6CA,CN87,14.075352,FT8,-02,-15,,,
2019-09-27,18:09:45,2019-09-27,18:11:15,KD5FOY,EM12,14.074410,FT8,+08,-15,,,
2019-09-27,18:33:30,2019-09-27,18:34:30,WF3P,FN20,14.074632,FT8,-06,-15,,,
2019-09-27,18:35:09,2019-09-27,18:35:19,WF3P,FN20,14.074632,FT8,-06,-15,,,
2019-09-27,18:54:00,2019-09-27,18:55:30,KJ7COA,CN88,14.074925,FT8,+02,-15,,,
2019-09-27,19:15:00,2019-09-27,19:16:31,K9ZW,EN64,14.075022,FT8,-12,-23,,,
2019-09-27,19:32:30,2019-09-27,19:34:00,AE4CC,EM13,14.075307,FT8,-04,-20,,,
2019-09-27,21:00:45,2019-09-27,21:03:15,K2AMF,DN17,14.074838,FT8,-07,-17,,,
2019-09-27,21:42:15,2019-09-27,21:43:45,ND6H,CM97,14.074576,FT8,-11,-24,,,
2019-09-28,00:13:00,2019-09-28,00:16:00,NE8O,EN83,14.075104,FT8,-10,-16,,,


I have put the rig in storage for a while due to more pressing projects
for the RPi4.4 course (K7QO YouTube.com channel) and more than 60
physics programs that I have written in the last 20 years and not
published yet, so gotta get that done before they go to the landfill
with the rest of the estate.

FYI

chuck, k7qo, beta tester
Eric KE6US
 

Look in your slicer for a way to turn the top and bottom layers off.

In Cura, look under Shell. Set Top Layers and Bottom Layers = 0.

Let it reslice, then click on Preview. You should see the infill clearly exposed. You might want to experiment with different infill patterns to get a grid you like. You'll see the results in preview as you make changes.

BTW, the models come into Cura on edge. They need to be printed with with the top surface of the case down. If you try to print it on edge, turning off the top/bottom layers will leave those sides with exposed infill. That isn't what you want. Not to mention other printing ills from overhangs from printing it on edge like that.

Ender 3 is tremendous bang for the buck. The mechanics are all there, but the slicer is more than half the trick to getting the results you want.

Eric KE6US

On 10/2/2019 9:52 AM, chuck adams wrote:

o Enclosure from . Let me
know if you figure out how to do without it being solid like mine.
I'm no expert on 3D printing with my Ender 3 printer.
 

The Ender 3 is a great printer, but Creality took a few shortcuts. I just had to replace the plastic extruded with a metal one: All prints came out underextruded and after some debugging, I noticed that the filament was working it¡¯s way into the plastic extruded - which created drag and a slower feeding of the filament. This is the part you need: (or the equivalent via the slow boat from China). I just did this the other day, and my first prints yesterday (antenna insulators for a linked dipole) were great. There are videos on YouTube that show the whole process.
--
Karl Heinz - K5KHK

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