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Those without, Complain!

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N6QW Homebrew Radio BLOG

SDR RADIG Part Information

 

May 30, 2019

I particpate in a monthly (usually) Podcast with Bill Meara, N2CQR. In the most recent Podcast, #211 Bill talked about a book he was reading called Coders. This book explores the divide between the Analog and the Digital "people" with its roots in ambiguity. The Analog guys always live in Ambiguity, whereas the Digital guys, it is either a "0" or a "1". Bill futher explained that in the Analog world things can "sorta work" but not to the full extent. In the Digital world--it is either on or off often demonstarted by error messages like won't compile.

In the past two weeks I have experienced the world of ambiguity and it is driving me nuts. It all has to do with my acquiring several 1960's -- 1970's boat anchor radios at very cheap prices and then making them work. The grand plan is moving some of these gems to a Digital VFO.

One such rig is the WRL Duobander. This was a $160 radio (1960's) that worked 80 and 40 Meter SSB over two ranges: 3.8 to 4 MHz and 7.1 to 7.3 MHz. It had two 6HF5's for the finals and had a 300 Watt input. Contained in the rig was some very clever circuitry with a 5.55 MHz four pole crystal Filter and a VFO that tuned in the 1.6 MHz range. Using that combo a simple mixer with band pass filters produces either 80 or 40 Meters.

But that is the problem! When things "sorta work" it makes it hard to find out why it doesn't work fully. My Duobander does receive and does transmit BUT it is weak on sensitivity and the transmitter output is only about 100 watts. I note that someone has been tinkering with the circuit board in the locations where I would look to find the problem. So that tells me --it was a problem before I got it. Follow this link for more on ambiguity.

 

Pete, N6QW

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April 29, 2019

MOVE UP TO SDR!

Forget Simple SSB Transceivers & Homebrew Filters!

 

 

QUISK 4.1.15

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April 18, 2019

SoCal Simple SSB Transceiver Sketch

A Digitally Controlled Analog VFO

 

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A Third New Transceiver for 2019!

The Simple SSB ~ 10 Devices Total!

 

Transceiver #1

  • Old Technology with a modern flare ~ Arduino Nano/Si5351
  • Two 3N209 Dual Gate MOSFETs are the complete IF Module
  • Bilateral Operation from SPRAT 128 and G4GXO
  • USB/LSB and Two VFO's (FT8/WSPR)
  • 9 MHz IF on the 40 Meter Band
  • 128X128 Color TFT Display
  • 5 Watts out with a IRF510
  • Re-use of many old transceiver assemblies/parts

Stay tuned for more exciting details. Work in Progress.

Check out the size of the rig as compared to the D104 Lollipop Microphone. Small is a good word!

73's

Pete N6QW

2019 Transceiver #2 is here!

7[Note on 2/27 moved to 20 Meters]

 

 

New from the N6QW Radio Laboartories.

The Sudden 40M SSB Transceiver.

Here is the Detail!

 

Part II , The Sudden Transmit Stages now in the DETAIL!

 

Arduino Code for the LCD to OLED replace.

 

August 29th, 2018

S Meter Test Code as seen in Hot Iron

 

 

RX110/TX110

 

Pete N6QW

 

 

2018 ---- The Sudden 40M SSB Transceiver

 

The Simpleceiver

Old Postings From the Blog ~ 2015

Takes 15 Seconds to download

The Current Simpleceiver Plus V2.0

DuWaynes [KV4QB] Arduino/Si5351 VFO Sketch

 

Simpleceiver Two VFO Code

Revised Simpleceiver Two VFO Code ~ No Flicker

 

 

 

 

 

The N6QW Big Kahuna

 

 

 

N6QW's Mini-Rig 07/2017

 

 

A 40 Meter SSB Transceiver with a Yaesu Filter

 

The Bitx40 Project as built by N6QW

 

 

 

 

Link to JESSYSTEMS.COM
Jameco Electronics A great resource for project parts!

 

N6QW Projects
* Raspberry Pi3 with a SoftRock SDR

(Process revised 8/9/2016)

 

The LM373 ~ A 20 Meter SSB Transceiver

 

 

 

 

 

 

 

 

 

 

 

The KWM-4 ~ A Homebrew Work of Art!

 

 

 

 

 

 

 

 

 

 

 

 

 

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