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Hi Richard, Are you interested in selling that burned up board? I am looking for something else to experiment with. I would be interested in the board and Raduino. Please let me know if you are

This mod works great!. I have been using it with a similar upconverter / dongle with the SDR software for several weeks--- works very well... The tap / place Gregory found is perfect and the pictures

The 30x improvement by calibrating at 30mhz vs calibrating at 1mhz is not theoretical, even if your hearing is shot. Instead of looking for a 10hz change in tone, you are looking for a 300hz change.

Just a thought: It seems to me to be without question that if one were to allign/adjust/tune an oscillator to a precise frequency by listening for a zero beat with respect to a known reference

Very nice.? This is another reason for me to get a 3d printer.? Which kind is yours??? I posted this picture before of my temperature controlled variable 20mm fan.? Not much spare room in my case

See attached photo for the pin connections on the molded-plastic 3.5 mm jacks. -- Jon Titus, KZ1G Herriman, UT USA

Well this jogged my memory when I used 21 figure logs and 15 figure Sine tables . Both books about 3" thick. Cosines and tangents are calculated from the Sine tables using trig functions. The

In answer to Mike's question, the RD15*/RD16* parts are an alternative to the IRF510's. But they are not magical, just stuffing them into the uBitx will not improve things by much, there are a number

Can't find the post, but I think Allison has already answered this in the affirmative. Could stick with the 2n3904's if gain is reduced from 16dB per stage to around 10dB. But then need a fourth

do you still have the unit ?\ I would like to buy it

My ubitx got hit by a power surge and I am looking for a board locally before ordering from hfsignals. SO if you have a ubitx unbuilt and willing to part let me know.

I think I can blame android for the 4th paragraph. Basically I meant to say that I had to redesign the shroud to fit the larger heatsinks and that I only have very slight warming with prolonged ft8

I did not get good results with this mod, I found 80 meters had reduced output. It is also difficult to implement, since to remove some of the parts, you need to remove the FETs first to get to them,

Any chance the ubitx could be offered via Amazom with the price to reflect the additional fees. The reason I ask is I have some Amazon gift cards to use up. Tx Joe N7QPP

There are a number threads with the power train mods being discussed and I've lost track of where I read some comments I think between Farhan and Allison about using easily obtainable parts in the

I believe there are many pin-compatible replacements for the LM324 for those who want better audio noise performance. For example MC33179, MAX414 - although many through hole DIP parts are reaching

Hi all, I did the same mod as Nigel G4ZA did but using FT37-43 giving 30uH? in series with R86? and 2 ceramic disk C's 220 pF. And? al with *exact the same* power output results!! Now I see another

Hi Nik, You could put the audio amp on there like a 2n3904 replacement version per the new ubitx version. Or some AGC circuitry? Or one of the more sophisticated pop suppression circuits (admittedly

Depends on the regions. In Europe 10 meters are open for e-sporadic in may and June every year. Anyway many vhf and uhf transverters have the IF at 28, so I'm my opinion it is important to have it

lovely recollection of my 1st job doing optical design by using BIG "BIBLE" LIKE 7 FIGURE LO AND SINE COSINE ETC BOOK -- WAY BACK IN 1964-65 Thaniks Kevin Regards MVS Sarma wrote: