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Very interesting and clever. Thanks for the tip. How closely are the RD16HHF1 equivalent to the original mosfet? I do like being able to bolt the heat sink to the case and use the case which is

Just ordered my 2,8 display. I guess that leaves 5999 ?Bitx users left to order theirs. Not in a rush because this will be for my next ?Bitx. My first will be primarily used for barefoot digital and

This should be a link to my Google drive where you can see some pix. With the RD16HHF1 if you lay the tab down on a table with the leads facing you , you have to cross the two leads on the right of

Hi, Don't use the light bulb to sort things. If you don't have the gear or the knowhow you might find somebody at a local radio club who can help you. I haven't read all of your posts but maybe the

Audio is now good.

Well thanks for everyone's help but it is apparent that I do not have the technical expertise to debug this radio.? I have given every bit of the patience I can muster.? I will have to try to find

My RX with the modified audio chain. I am able to get much better audio with this MCP6284 amplifier that I had laying around from another project. I power the amp from a separate switch mode supply

Hi all ! I just wonder if anyone have tested with P16NF06 in the final PA?? for uBITX ?? 73 de sm6mpa/Hasse/Gothenburg/Sweden

Hi Bill, There are a lot of reports of QSOs with the Light-bulb-dummy-load antenna. It happened to me too and sometimes the distances were pretty good - several hundred miles. It's what we had. Our

Latest update: I have solved the clicking issue when operating the VFO. The cause is that the Si5351 chip is very sensitive to noise on its VDD inputs. The design of the decoupling seems to be

CAUTION! The impedance of an incandescent bulb varies greatly over the range of power you might send to it. It can be as low as a few ohms and as high as several hundred ohms. While it may work as an

If usiing a low impedance speaker (4 to 8 ohms) it might be interesting to try bridging across C-74 with a 220 mfd capacitor. Observe polarity, positive toward transistors and negative toward speaker.

On Fri, Jun 15, 2018 at 09:01 pm, Mike Woods wrote: Always good to see a nice crisp summary.? It's just amazing what Ian Lee, KD8CEC, is able to do while keeping the original uBITX Raduino with the

For VOM advice, I'd go look through the EEVBLOG forum's Test Equipment section. One of the first posts in there is a spreadsheet of 210 meters in 38 brands, and discussions of many more. And that's

I'd love to see a close up of the new finals, crossed leads and heat sink if you could! Roy WA0YMH

Hi A light bulb works as a very quick n dirty go/no-go check. Even with the newfangled solid state gear. But you still need that dummy load and some sort of SWR bridge for regular operations. Even

Off topic but you brought back memories. As a novice back in 1966, my DX-40's only dummy load was a 75w bulb. I even got my "Rag Chewers Club" certificate on said "dummy load."

While they cost close to $ 5 each you may want to look at replacing the outputs with some RD16HHF1. One good thing is the tab is at ground so you can bolt it directly to a heat sink. You will have to

What you can always do to reduce the load and heat on the poor ol' 5V Regulator is to just add a series resistor of adequate wattage to drop the regulator input voltage to 7V or so. Simple, but not as

The Simpson 260 used several kinds of batteries over the years for the ohms function. Often a D size for the lower ohm scale and a higher voltage one for the highest ohm scale.. Some odd ball ones by