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Bob :? I am very glad to hear that you sorted out your problem with the SotaBeams DSP filter.? Enjoy !? Cheers Michael VE3WMB

Is there a circuit or, better yet, a board available? It sounds like this could be current limiting as well. Sent from my Verizon, Samsung Galaxy smartphone

Now with this said… you could measure the current draw to the FET using a small Hall-effect device and use that to make a simple resettable trip circuit. Very easy to do. Dr. William J.

I think you are missing the point. Tim is somewhat correct in that limiting the current to the FETs at any point along the characteristic operational curve in any form causes non-linearity and

https://github.com/amunters/bitx40 Supports LSB, USB, CWL, CWU, keyer, RIT, SPLIT, etc. plus various performance improvements. However no rotary encoder. 73 Allard PE1NWL

toggle between Straight <-> Paddle (A or B), so if crruent straight key selected, show Fn(A), Fn(B), if paddle key selected, show Key:Straight? but, I used the Toggle method to reduce code

A current "limiter" which modulates the current, i.e. limiting the current no matter the drive level, is like applying an ALC to the exciter. Improper design can result in compression of the signal

Marco First, there was a problem with previous H / W compatibility. Are you using a straight key? The concept of this firmware is that it can be used without any modification. Please upgrade only

Mike Thanks for your fulltest.. perfect! I have found improvements in your mail. These improvements will be reflected in version 0.3. When version 0.3 is finalized, we will change the version to

Marco - you need to go into Setup mode and then re-enter the menu and select Key Fn.=A. It defaults to a straight key M

Hi Cesar,? I'm also following this thread which is similar to what I'm experiencing:??/g/BITX20/topic/no_tx/7733258?p=Created,,,20,1,20,0&jump=1? -- Dave Beal AE6RQ

Must have missed them. I look again Thanks Bob W5rkm

Arv, yeah, the susceptibility of the zeroW to the RF would probably be the hardest part. I was discussing this with another friend, and another major issue came up: Sourcing the damned things. You

I forgot to mention that it worked before the upgrade and is wired according to the hfsignals instructions/schematic. Thanks again. Marco - KG5PRT

Hello Ian, I have just upgraded to v.30 and all the settings and fixes are much appreciated. I have a problem, though. I am unable to use the keyer. It does nothing. Is there a hardware mod that

Two problems that may affect use of a Pi-ZERO inside the uBITX. First it will have to be shielded to minimize radiation of spurious signals that might detract from typical BITX quiet background and

I need yet another project like I need a hole in my head! :) The my top mod PCB is something I should get working first, but I may later try doing a simple rpizerow to teensy3.2 adapter or something.

Tim AB0WR No modulation involved. The operation is as a switch between ON and almost OFF. Gain of the two BJTs makes it operate quickly and drop the output voltage to the point where the current

Surfboards (digikey) are your friends. I use them all the time. Pretty expensive but for single applications nothing beats them for using all kinds of smt parts. tim ab0wr "Ken KM4NFQ"

JUST SAY NOOOOOO!!!!!!!!!!!!! Rather than modulating your signal, why not just use a noise bridge to tune up your antenna WITH OUT TRANSMITTING!!!! Check this out....