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Gerard -- ??? If you're only interested in *reception*, then perhaps a simple mag-loop is all you'll need.??? I bought an MegaLoop MLA-30+ for about $25 that I've fed into my SDRs as well as my

Hi Gerard’s, You can build a simple halfwave dipole and fold the ends back on themselves. You didn’t say what band is your primary interest and how you intended to feed it with coax or

Hello, A two-penny question. I want to build an antenna only for the reception of my homebrew? Ubitx. I must put it in the attic. I have everything I need to build it. I started making tubes to pass

EXCELLENT!!? Maybe add your name and/or call sign?

When I was a Novice, I bought an ARC5 and I think I paid $3 for it! It was in a garage sale! Jack, W8TEE

Chris, That is absolutely brilliant! -- Mark, kb9woo Milwaukee, WI uBITX v6

Often, we build something and sometime even put it in some box. While we are developing and building, we know what the function of each button is. After some time, we build something else and when we

I distinctively recall the ARC-5 series.? I tore apart one of the transmitters (TVI generators?) to build my first legal transmitter over half a century ago. Gerry Sherman, VE4GKS Sent by the

They had the best tuning capacitors ever produced. - f [email protected]> wrote:

Yup, remember the ARC5 well. Mostly fondly. I was using an ARC5 receiver and transmitter on 40m CW while a college student in the 1970's. Designed in the 30's, they built hundreds of thousands of them

Hi Ford, The gain capacitor (C75) is another item in the support devices around the LM386 that can impact the frequency response.? If you look at the TI datasheet for the LM386, you will see that

Hi Indra, i also build a ubitx by scratch. My solution you can see in the circut diagramm. The audio preamp has a gain of 40 dB as lowpass with cutoff near 3kHz. I also had problems with motorboating

I think you are on the money. Last year, during the lockdown, I built a direct conversion radio, then I added a discrete filter made from 4 transistors. The audio was so sweet!

I'm considering ways of reducing the white noise of the uBitX.? Perhaps it is my nostalgic quest to reproduce the audio of an old ARC5 direct conversion tube radio.? Remember the ARC5?? 10 KHz wide

Gary, I forgot to say that I hadn't delved into the TX process yet. Ramón

Hi Chris, At the moment, I was just trying to understand the software and filters, not modifying the hardware. That would be a second step. Thank you very much for your contribution. Saludos, Ramón

Hi Gary, I have not advanced because I have been busy for several days with family and health matters, but I am on it. You are right... and no, I mean. I was considering a useful audio band from 300Hz

Hi Ramón, Have you had a chance to test the software modifications?? I spent some time with it yesterday.? Seems to be off by the 300 Hz (Audio Low Freq). (which is what my computations also says,

On Wed, 16 Mar 2022, 2:31 pm Gerard, <kabupos@...> wrote: > Hello, > > i received this private message: > > Dear friend, > May I request you to please forward > the Schmatic diagram of the RF

Hello, ? Thank you all for the valuable advice. ? 73 by JPaul F4FIY