Listen to Latest SolderSmoke Podcast

Saturday, October 20, 2018

Pete's New Transceiver with Heathkit Filter and WSPR (Video)



Another beautiful rig from Pete. Inspiration for the winter building season.  More info on his blog:

http://n6qw.blogspot.com/

We hope to discuss this and other projects in the next SolderSmoke podcast, hopefully next Saturday. 

Wednesday, October 17, 2018

M0HYT's Through-Hole (No Surface Mount) uBITX


That's the spirit! I like how Peter M0HYT took the uBITX schematic and built his own, his way.  When you build the rig yourself, if problems arise (spurs, harmonics getting past filters) you are in a much better position to fix the problem. I'm afraid that sometimes those buying an already-assembled board just feel aggrieved if the purchased item is not fully within specs.     

M0HYT posted this to the BITX20 group (this past summer): 

I have just built a uBITX with standard components (no SMD's) from scratch on a PCB I designed - it works well.  I have now designed another PCB which incorporates the Arduino NANO and the the Si5351 shield and I'm just waiting for the PCB's to arrive and then I will start assembling.  I made some changes to the circuit to allow for a dynamic microphone and the use of screened TOKO cols for the 30MHz lowpass filter, I also changed the coupling arrangement to the 45MHz filter.

I have attached a picture of the original PCB and a PDF of the new layout incorporating the Arduino and Si5351

Maybe one day I will play with SMT but for now standard components are still easily available !
 
73's - Peter M0HYT



Tuesday, October 9, 2018

Falcon 9 Launch, Landing and Sat Deployment Video



Very cool video from Space X.  I like how they have the time-line along the bottom and the telemetry in the upper right.  This is the first time they brought a first stage back to Vandenberg AFB.  I hope we get to watch the launch of the Indian Cube-Sat in November. 

Monday, October 8, 2018

VU3XVR's EMRFD TIA HB TRANSCEIVER

VU3XVR-40m-CW-TXVR-Homebrew-5W-QRP-Transceiver

Ram did a beautiful job on this 40 meter rig.    You can read about this project here: 

https://vu3xvr.blogspot.com/2018/10/homebrew-5-watts-cw-transceiver-using.html

Sunday, October 7, 2018

Stockpiling Parts for Analog Oscillator STABILITY


Doug DeMaw taught us that a key contributor to analog oscillator stability is the use of NP0 capacitors.  As part of my effort to maintain the ability to produce analog, discrete component, coal-and-cap, chip-free oscillators, I recently went out onto the internet in search of an assortment of NP0 capacitors.  Nightfire Electronics had just what I needed.  I took their assortment and put it in a parts box for easy access.  


Saturday, October 6, 2018

Radio Astronomy Knack!



This video has so much of the kind of stuff that interests us:  roadkill antennas.  3D printers.  Arduinos.  Raspberry Pi, And of course, RADIO ASTRONOMY.   

And the Thought Emporium guys have a lot of other great project videos on their YouTube site:

https://www.youtube.com/channel/UCV5vCi3jPJdURZwAOO_FNfQ

I feel myself being pulled back into SPACE.  First there was Farhan's new satellite, now this.  Last weekend I finished a 3 element quad for 146 MHz.   In a fit of nostalgia I used the same copper tube elements that I used to communicate with the MIR space station from the Dominican Republic in 1995. They have good JuJu.  And Mojo.   TRGHS.  More on this later. Tune UP!  

Designer: Douglas Bowman | Dimodifikasi oleh Abdul Munir Original Posting Rounders 3 Column