开云体育

I am working on a mod (tapping the antenna to share with an SDR (Not the IF, the actual antenna). I am looking at tapping the output of K3 so as to switch it out on transmit. Looking at the schematic

We must use different libraries. I send out the start conversion word to the part address… and away it goes. Then sometime later, I poll to see if conversion is ready/ do a read at the same time

Oh yes, over a narrow frequency range, of course! You just need to design the circuit around the motor switch to compensate for the high input capacitance and it works perfectly… Dr. William J.

Anyone else on? Just S6 noise here so far! -- John - WA2FZW

IF the filters are not matched to 50 ohm the insertion loss due to mismatch is very high as well never minding the?bandpass distortion.? That means the network on the board has to be part of the

You said That's not correct, unless you add some code to handle i2c transmit and receive in interrupt routines.? That's some code most of us would prefer to avoid. We currently do blocking IO on I2C

Thanks, That's exactly what I needed. Jim

Ok Jack, I will concede that whitespace around the "==" would have been a good idea. And that the extra indent is an error. A work in progress, I did state it was "unproven". Guess I lose a grade

We must not speak too low about using the IRF510 as a cheap PA transistor, after a bit of tweaking output looks just fine! Even Uniden are now using IRF520's in their 27Mhz CB rigs:

If you are operating Class C (for CW), 10mA is probably fine. For Class AB (linear SSB) you need the higher current. and everything gets much hotter.....heatsinks, etc. Re. the Ferrites, for the

Jim, HF Signals buys them from a compnay called WTL Crystals, based in China. There are several sellers on ebay on aliexpress. Most of them are the same 2 pole filter that we use. I found one just now

(Actually, it's the post-decrement operator, not the decrement operator.) I wasn't saying I don't know what the post-decrement operator does, I was just asking why make the code harder to read by

In the C language, the "--" operator is "decrement". So in this case, the instruction is indicating that d should be decremented by 1, then compared to r. If the decremented value of d is equal to r,

No, I understand what the code does. My question is why write it in such a confusing way. As my subsequent post states, there's nothing to be gained from this way of writing the code, other than

“Actually, reading values from an A/D over the I2C bus will take more time than just reading from the Nano's embedded ADC. “ Yes, but in this case, taking more time is ok… because the Arduino

Well, not really. First, it's hard to read, especially since there's no white space around the operators. Second, look at the generated code. It's the same for: while (div>0) { ? ? if (d--==r)?

Tim, I have a "YouKits" digital QRP SWR/Wattmeter with a 2 amp hour LI-Ion battery pack in it that just happens to be set up (by the factory) so that you can pull the 12 volts out of the bottom via a

This why I picked r216 and r210 as measurement points. I assumed those points should be close to being 50ohm points as they are outside the L network matching to the filter. tim ab0wr "Ashhar Farhan"

Thanks Arv… I tend to design stuff that I want to use and, therefore, it has to have all of the bells and whistles I want… not just bare-bones. I’m also cost conscious, so all mu designs use low

Allison,? Yes, simulation shows input impedance to the FET's is around 12 ohms. True for both the uBitx and the WA2EBY. ? ??/g/BITX20/message/41227 Any opinions on those two RF