Simpleceiver ~ Part 24

A Single Schematic for the Simpleceiver!

Quite honestly I bristled a bit when I received several requests for a single overall schematic for the Simpleceiver project. Many of the inputs were if I had a single schematic I could better understand the project. Friends that is why we have the block diagram.

Well I guess my bent is if you don't understand the circuit blocks having the whole schematic may not lead to a "Level 5 Enlightenment". Another goal of the Simpleceiver was to encourage experimentation and the modules have been designed for the most part to enable matching to 50 Ohms. You can simply replace a Simpleceiver module with a different module and have a go at it so long as you look at the impedance match. An overall schematic may make that task more difficult.

But one kind soul DuWayne, KV4QB has taken on the chore to create such a schematic which is in a pdf format (Sorry guys no GIF's or jpg --so don't send me an email about the quality coming from a pdf) It is only through the generosity of KV4QB that you have the singular pdf. Also please no emails can you break the circuit up into pdf blocks!

I have repeatedly stated the use of LT Spice in developing and working with such a project. A serious homebrewer needs to adopt and adapt to that tool. If you want to make circuit changes the first thing you should not do is send Pete and email asking me to do the analysis. You have the tools and examples, so you the homebrewer need to ask the question of yourself about substitutions.

Click on this "LINK" and it will take you to the Simpleceiver Software link which is hosted on my website http://www.n6qw.com. There you will find the Simpleceiver Single Schematic in .pdf document.

Happy New Year to all of you.

73's

Pete N6QW

January 26, 2024. A simple CW Transceiver/Transmitter

Cruise through the lower part of the ham bands bands and what do you hear? Well, FT-8 and CW. Often you will not hear any SSB stations yet go to the lower part of the bands, and it is a cacophony (I love that word) of bad sounding signals and some high-speed keying. Fast is not so much of the issue as is bad, run together and jerky keying. But none the less our hobby started there. So, you could crank down your ICOM 7300 and watch the waterfall on CW or you could homebrew a radio. Actually, to do CW right you need more thought up front than you do with a SSB transceiver. Often, I will state that a CW Transceiver is much more difficult to build than a simple SSB rig. I published two articles in QRP Quarterly on CW transceivers and all I got was a yawn so maybe history will repeat itself. Yawn! 30M CW Transceiver with RIT! Of interest is that the LO is a Varactor tuned LC oscillator using a NE602. Look closely at the RIT circuit which is only activated on ...

March 31, 2024. Happy Easter to those who celebrate this day.

What a great day to Binge on Chocolate and experience the pain of that filling that has been leaking. I would be in that category with the leaking filling(s) had I not just spent an amount equivalent to one of the fancy new uptown appliance box transceivers on two filling repairs. Well at least I can binge on the Chocolate bunnies without fear of pain. Regrettably everything appears to have jumped in price including the price of parts. Well not so much the parts as the shipping costs. That notably is seen in the eBay treasures. I spotted a nice heathkit DX-20 for about $50 and the shipping was $65. Likely it is a twofer with part being a way to in effect charge a higher price by inflating the shipping and in part by increased shipping costs. Shipping with insurance across the US was about $150 for this jewel and that was three years ago. 6AM on the Left Coast ~ 20M Easter Sunday! My only hope is the cost of Chocolate Bunnies remains steady although a pound of See's Candies f...

August 30, 2024. A PNP 20M SSB Transceiver

Shown below is the Block Diagram for the 20M PNP SSB Transceiver steered in the Transmit Mode . The components shown in the dotted block are relay steered so that the block module is single pass and amplifies in a single direction. The Block diagram show steered in Transmit. Essentially the steering process works so that the IF Module input follows the Balanced Modulator on Transmit and then the input side follows the Receive Mixer on Receive. All done with some relays and a bit of RG174U coax. For those who count things in detail, this block diagram is not unlike what was used for the PSSST Transceiver which can be found on my website . Yes, a warmed over P3ST only using PNP devices. TYGNYBNT. 73's Pete N6QW

Pay More and Get Less. Flash the Cash!

Search This Blog