Skip to main content

April 17, 2024. Something you can build.

 


Check N2CQR's Solder Smoke Daily News posting yesterday for a really super neat Direct Conversion Receiver project (DCR) from Geoff, N6GWB. One of the circuits he mentions he used with the J310's configured as a Dual Gate MOSFET is based on this design from me. Not a lot of parts but surely a lot of performance.

For the full detail of the J310 DCR check my N6QW website. The direct conversion receiver offers a superb result for not a lot of hardware nor lot of money. Yes, something for those who had to pay Uncle Sam some $$$ a few days ago.

Notably this same circuit topology was used as an IF amp stage by substituting a fixed Bias on Gate #2. I found a module using this approach in the Junk Box and have a "sorta of working" SSB Transceiver using that old module. You will see that shortly. Yes, it has a homebrew 4.9152 MHz four pole filter and for those with a Nano VNA you could actually use that jewel on that board.

I mentioned to Geoff, that a companion project would be a matching transmitter. Yep, I am planting seeds for a PNP transmitter to be built. 

Always slightly ahead of the curve. Noteworthy and sounding like a broken record, LT Spice is used to tweak the circuit before you buy any parts or turn on the Soldering iron. There is a note there about the use of the 2N3819 in place of the J310. Not as good but if you have some in the junk box -- no excuses not to build a DCR.

73's
Pete N6QW

Popular posts from this blog

2019 ~ What is the simplest homebrew SSB Transceiver that can be built?

4/27/2019 The Future of our Hobby is Here! Forget those simple rigs with homebrew crystal filters, cranky IRF510's and the analog VFO's. SDR is the wave that is building strength just like a Tsunami. With the Soft Rock V6.3 SMD Version + RRPi2 With the Omnia SDR and RPi2 Pete N6QW How Simple & How Cheap can you  build a Homebrew SSB Transceiver? 4/26/2019 --- I just converted my websites from an obsolete Windows Based Server with GoDaddy to their cPanel (Linux). This was a cost issue as a one year renewal of the Windows Server would buy three years on the cPanel. GoDaddy is discouraging the use of what they call the Obsolete Windows System. So I had to migrate and reload the whole pastapete.com, jessystems.com and the n6qw.com sites to the Linux based servers. Some files and links got lost in the translation --so you might not be able to see everything! Essentially I have  to open every link to verify that it works --that may take some time
Read more

New Technology for 2020 ~ The Hermes Lite 2.0 SDR Transceiver

  The Hermes Lite 2.0 SDR Transceiver. November 7th, 2020 ~ It's Settled! It is done! The stain of the Trump era is soon to be removed! Thanks to all who voted. The Voice of the People has been heard.  Congratulations to President Elect Biden and Vice President Elect Harris. Pete N6QW November 3rd, 2020 -- IT WAS THE MOUSE   We all know this is Dump Trump  Day. Go out and vote! It was the mouse! Back in 1999 I stupidly was one of the very first to purchase a Ten Tec Pegasus. Never buy the first batch of a new model.  Touted as the world's first computer controlled radio , actually I think the Kachina 505 was really the first. But the Pegasus was fraught with problems including a trip back to the Smokey Mountains. I was using an older Windows 95 machine to control the Pegasus and that may be a co-conspirator. Well after many calls to TT -- finally someone who has some smarts told me: Fix your station ground, Make all leads short and Buy stock in a ferrite bead company. I did all
Read more

The Next Project Updated 10/10/2022! The rubber has hit the pavement!

The Next Project... A 2022 Transceiver. 10/10/2022 My Apologies. It is with regret that I will be terminating any further work on this project. My caregiver duties have over time become a greater time sink and it is almost impossible to build something working only 10-15 minutes at a time spread out over a day. I apologize for not getting it from design ideas to complete hardware. Most likely I have built the last transceiver I will ever build. Thanks for riding along. My website https://www.n6qw.com/  has the pdf of the postings and I will leave this blog page as is. 73's Pete N6QW 10/05/2022 Still Alive! Regrettably my caregiver duties have overtaken any free time so not much progress. But I am hopeful yet this week I will cut at least one board. A PSA from N6QW.  Think of it like Mary Jo has a "crink" in her back and unable to get in the backseat of the 57 VW Beetle. A bit of a setback but not forever.  Seems like the hired caregiver had a small emergency and not able
Read more