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Warren, Notice that these peaks are attenuated as you approach 30 MHz. That is indicative of the loss in the system at those frequencies. The lower the loss of the transformer the higher and more

Jerry and Gordon Great data Jerry! I too am scratching my head over some the entries but it is a start and good to know. I don't understand the impedance variation of the terminated pair and the

hi what version of the sketch is installed on the bitx40 currently on sale. terry gm4dso

Using the wiring as detailed in earlier articles I find that 2.0K resistor in each outer lead with the led centre pin earhed (or -ve) gived for me just the right brightness. You could try 2.2K which

Assembled immediately and fully functional. I did dozens of QSOs in Psk31 and FT8. Now it passes immediately in transmission just turned on, I tried to detach the orange wire at the entrance 5 to

Thanks, Jerry!!!!! The “heat” measurements are very much appreciated!!!!! I’m going to send this to the folks in our area Gordon

wow, rahul. meticulous work! i will try this out soon. - f vu3wjm@...> wrote:

I did that back-to-back test of two myantennas.com matchboxes. I'd say they are plenty efficient for my purposes from 3.5 to 30 mhz. My 2 year old matchbox is referred to here as xfmrA. Text on the

dkuk I want to thank you for pointing out this error on ubitx.net.?? I have? fixed this temporarily by removing both the photos from that page and by deleting the reference to the hfsignals.com

Hi!, I have been scratch building a uBitx and had been experimenting with the 12 MHz QER filter. I have noted few things and adopted some from various postings on group. 1) With the set of xtals that

The front panel stereo socket board wiring layout for universal case for ubitx has been published. 8 pin relimate female to female connectors are used for digital and analogue connectors on ubitx

Ryan,? Hints sent to your youtube page based on KNOWN performance of similar Renesas? ?mosfet in parallel operation for bringing power up to region 14W RF out. Timothy E. Fidler : Engineer BE

Arggh an assumption re-arranged? makes an Ass out of you and me.!!!. I thought Ashar F would have gone done the merry conventional way with pulling the BFO to get sb flip? .. so next time you want

OK, we have a lot of misunderstanding here...? uBitx. If the master osc is not set on frequency everything else is likely to be off frequency and work poorly. The filter is ladder filter (not a Cohn)

Allison, Thanks for all the suggestions!? Regarding your points: * I do not have a star washer at the coax connector on the uBITX.? Nor do I have star washers under the mounting posts.? I'll give

Both if it’s easy?? 72 Scott ka9p Make something good happen!

IRF510 at 20M is not an issue or even working hard.? I have several radios that really work on that band using that critter. Bitx20 (V0) from the early years, uBitxV3,? Slopbucket 20 a Kd1JV

Terry, I did this. I also changed the PA FET for a RD15HVF1 because it worked a lot better on 20m than the IRF510. Info on both here: http://miscdotgeek.com/converting-bitx40-20m/

Sorry . brain fade.. invert the answer. Jack clearly had to set the BFO way Low to select USB so it would pass the Cohn filter which appears to have its passband low on 12.0000 but the issue still

Jack it is not a problem - it's? FEATURE ! But if you were setting this up on a system which has to swap USB/LSB between 40 m and 20m, which yours will since you are uBitx ..? I suggest you need to