Order placed - looking forward to it. Thanks Ashar!

Excellent point (cw key). One of those situations where you go down a road and don’t think to step back and rethink things. I convinced myself that it was a transmit issue related to amplification and

Ok, I think I have this solved. Really short version: It appears that my major problem was the laptop that I was using for FT-8. The laptop that I have been using is not putting out consistent volume/

oh, and I have measured and the power supply is running just fine, and the radio works well in receive. -Sean

sorry, forgot to post some earlier test results...but first a bit of background....I had already changed q90 (as an experiment) and installed an mmbt2222a in that spot when I also changed the predrive

ok, today's update...I replaced the finals (IRF510) and no difference - they were not bad. Will be making some other changes this week...next suspect is the q90.

Hi Raj I'm pretty sure its not the power connector...I saw swinging power (past tense) and am now registering no more than about .5W max output, so something has cooked. In the past, that typically wa

I have just about permanently taken the top off the case the radio is mounted in, and have a cooling fan connected ... hoping that will be enough going forward. how hot are the transistors getting? we

I have had periodic issues with the ubitx that led me to believe that my finals (IRF510) were blown, and the radio seemed to work as expected after replacement, so perhaps they were. I have a question

I have overdriven the power chain by having the slider in wsjt-x up too high, resulting in the need to replace components. That’s why I was asking where the drive level was set to, as well as whether

#ubitx-help

Is the gain slider in wsjt-x in about the middle of its range? Does the radio do ok with ssb voice?

#ubitx-help

Here’s how this ended up going: I saw no damage to any traces, no damage to any components really. I replaced the IR marked irf510s (sourced from Tayda) with Vishay Silconix marked irf510s (from Arrow

I replaced both, yes. First time I have replaced with “international rectifier” marked parts from asia, which is why I was wondering if that may be it. Have been looking for visibly cooked bits in the

I have a bit too much experience with cooking the finals on my ubitx...I'm on about my fourth or fifth set of IRF510s. I think that I'm probably overdriving too much on digital modes...but here's the

Why cat? Well, partly it’s because that’s how I’m controlling the ubitx on digital modes, so there is an element of commonality. Also, I don’t have a signalink or equivalent, and am using a modern pc

I have a Bitx40v3 that hasnt been getting much use since I got my ubitx. I have been thinking about using it for digital modes, but before I do, I need to get firmware on it that will support CAT cont

Bill - just read through your thread...mine was a bit different symptom wise. I was able to power up just fine, display was working etc....the only thing I could notice immediately was that there was

Wanted to share my recent (frustrating) experiences. I recently connected my ubitx to the laptop and was running wsjt-x. Things were working great - getting good transmissions on a number of bands on

Well...the issue is that the ubitx arduino program (and the bitx40 programs for that matter), were written with the expectation that you would only need to update the display if you changed frequency

#ubitx-help

I have been looking at some of the hacks that require changing out values on the uBitx and bitx40 boards, and have a (hopefully simple question): what size and power value are the smd resistors? I'm p