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I am looking for a ready built SI5351 board, with isolating transformers.

If you haven't installed a cap on the output of the DSP audio filter I suggest doing so. Without it I had a lot of strange things going on with my audio as I believe that there is DC voltage present

Sarma Thank you for the great suggestion. This design is not from me. It is the work of?Kees K5BCQ. I agree...... a very nice job and I look forward to testing it. Warren - WA8TOD

Hi Darren, VE3XLT Can you please make this correction to? CEC 1.097 Nextion screen for my basic 3.5" (tft) display? TA2FU Alper

On key down it should well over 2A.

Still working on this. Speaker and audio out jack are wired correctly. So's the pot. It's supposed to be 10K right? I have both a paddle and straight key jack wired up according to

Warren, Thanks for nice job. We never get these vertical type relays. The filter caps may be 3 for each section, so that the user could reach closer value of capacvcitor by a combination. regards

Allison: No, I have been around, just too busy to keep up with all the threads. I wish there was a “Status” page that could keep everybody posted on progress. Thanks, David A Posthuma, WD8PUO

The 12VDC side of K1 is successfully telling K3 what to do.? If K3 is not listening and is stuck in receive, then the transmit RF from the PA will dead end in K3 and the PA transistors will get

David, You must have missed the last three months.... and a pair of very long threads!? ;) To clean that up yes, band pass filters are the option or some very fancy combination of high pass and low

K1 talks to K3 for Rf path.? Look at the schematic. Allison

It's funny, I have been working on getting my Laserbeam set up. Yesterday I wired it up pretty much the same (minus the extra components as they were not mentioned in the set up for the LB) But I have

Good Evening, All. My K1 relay was getting intermittently sticky on TX, so I decided to replace it.? I used an AXICOM with the same pinouts as the stock Hongfa.? I'm not very good at desoldering and

Oh dran! Any idea where the sparks came from? Any obvious scorch marks? Sounds like you bumped L8. Look at the schematic, L8 feeds 12v from PA-PWR into the left side IRF510. I have no idea what

Drain voltage dropped to 10 mv, now slowly increasing at 50mv wrote:

Ok, crap. I WAS measuring 12v at the tabs and 0v at the gates. BUT I think I bumped the inductor in front of the left final. Puff of smoke, a few visable sparks. Now measuring .84 volts either tab.

Dexter, welcome to the asylum. A data sheet for the IRF510 would come in handy so you can identify source,gate and drain pins.? As Jerry stated, the tab is also connected to the drain, although he

I was thinking, Jerry, with Gate at 0V, Tab to either 0 or Gate would be 12V - *and* no RF out. :) 73 de ZL2DEX

Evan, Not a stupid question.? All voltages are relative.?? In most cases, unless otherwise stated, relative to ground. So black lead on ground, red lead on one of the gates. Same goes for looking

Sorry for this, all, but just glimpsed this exchange: Evan, have you ANY electrical knowledge at all? You seem to be too junior in Hamdom to realize that a Bitx of any sort requires that much