开云体育

Excellent learning by itself! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa

I am seeing about a 2x variation in power draw on my uBitx with different dummy loads and a well tuned antenna. Here are rthe results with average measurements taken over two days. Dummy 1 was made

Gordon and group. There is a better alternative.?? Maybe you have not seen my posts.? So this may be new info? I have lots of RaduinoX (Nano) and XP (Mega) Raduinos.??? The X is small direct

I guess a good thing about this is that, if we do get this thing working, I will feel like I really built a radio....not merely plugged things into a board. I did something. That will infuse this

Ok good... thanks. I finally feel like I'm starting to get somewhere with this. I had measured the resistance between source and drain on the mosfet and found that it was close to 0. That also led me

Farhan, several of us can no longer find a way to buy the Raduino digital VFO by itself, on the redesigned website Will this become for sale again? It is an incredibly useful device for many

1. The drop in voltage on irf510 fits well with the measured current. So those measurements now makes sense. One confusion squared away. 2. Now that you've learned how to measure the total

Farhan, I enjoyed this post! My favorite was QuickC 2.5 with in-line assembly code. Step, watch and break brought some lost memories back. If I remember right I could watch some register values

First, thanks Gordon for the concern over the work truck. It's a company vehicle and it wasn't my fault, so it's not as stressful as if it were my own vehicle. It's just time consuming trying to

Ashhar ? I also have the PTT pop in my uBitx. It's particularly annoying in CW use. I mounted my raduino separately. I think I could reduce the side tone volume with a resister in the CW_Tone wire

Hello Andy and builders ! I'm building my own HF transceiver based on uBitx concept... As Fahran said : more is the bandwidth, more is the termination impedance. For SSB filter most of termination

My first guess is that the transmitter is actually trying to transmit and there's some real RF on the drain when he pushes the push to talk, which is causing the voltmeter to read even higher. I was

Something's wrong. If you start at 12.4, you can't drop to 13.8. Wrong direction. Even if that's backwards, it should drop a whole bunch more than that. Vince.

You sure that final's blown, or did you replace it already? When I blew the final in mine it took a 4A fuse with it. 1.5A would be just that idle control turned too far. Vince. -- Michigan

Huge progress here. Sorry again about the truck (I had a tractor throw a rod a few months ago.....) and I note a new sense of confidence in this builder! If there were a short between source and

Arduino suppresses these warnings. It is pity, I am a professional programmer and I tend to work with all warnings switched on, but i have thrown all that discipline to the wind on Arduino because

Change the R253 from 10K to something like 100K or even 220K. I know it is painfully loud, our apologies to the early birds. i will ask the beavers to change that resistor in the next batch. i

Thanks again, sir.? These filters are curious beasties.? I'm having too much fun playing with them. DISHAL predicted a 100Ω impedance for my second build (100pF caps).? I ran the numbers for an

Dr. Jack,? I have 2 (ea) of those boards that ordered from you sitting on my shelf above the bench in plastic bins already kitted out to build. ?I was thinking already to use one of the boards, if

1.5A on PTT is not OK. Now see if there is any change when you turn the bias pot clockwise. if you get 0.14 on rx then set the bias to 0.24 on tx without modulation. Raj