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Thanks, David. I disposed of all my ancient tube-type scopes, VTVM, and RF probe a long time ago and I don't have anything but a couple DVMs and RF wattmeters for most test work. I never had a signal

Thanks, Raj. I do get a good signal from TO3 right up to the base of Q911, but not after that transistor, which is why I am looking there, but the power indication (only about a watt) when I probe

Evan, I picked up a device at the 2019 Hamvention that looks identical to that one except for the color of the case. It has been amazingly useful with transistors, capacitors, etc.,and how I found

The TFT displays are almost unreadable in sunlight in a car, so I think that is another reason to go to a 2-line LCD option. The one on my BitX40 is easy to read in the car. You probably can do that

Moreover the joystick/directional buttons are just crazy thoughts out of my head and not a necessity . Any control system with character LCD will work for me. Ashok VU3KFK

Since I already ordered the uBitx V6 and following up its development since long, i want to use it. uSDX another option but that I considered for future. Anyways I found similar post in this forum.

Ashok, What might suit you is the uSDX - I have one from VU2POP and it is approximately 4"x4.5"x4.5" in size and 2W out on 2 bands of your choice. BARC club project. Raj, vu2zap

That sounds like a challenging interface for a mobile radio (the joystick and/or directional buttons, not the LCD display). It would likely require a lot of user attention for mobile operation. It

Hi all, I just ordered my v6. I primarily want to use it for mobile operation and want the unit to be very low profile. The enclosure should be as thin as possible, should not be thicker than 1.5

Jonathan, David AC9XH is correct in his advice.? The only difference was that my laptop audio did not work very well, so I bought an $8 USB dongle that solved the audio issues after adding 600ohm

To me it means the power amp from Q911 is working as it is oscillating and output producing power. Concentrate on Q90 area. best way is use a sig gen to drive the amp and check. Raj

Jonathan, if you were able to bring up cat,your 75% there. just run some cables from microphone of ubitx to computer headphones out. run another one from Audio output of ubitx to Microphone of PC. I

I want to experiment with FT8 on my ?BITX, so have built the simple interface using a USB sound card from my Mac + WSJT-X from G4ILO's website (schematic attached below). I could do with some

Vic, forgot to say, before you replace the transistors, check the biasing resistors going to each transistor in that circuit. with the transistors out it will give a better isolation to check each

I agree with Evan, in circuit paths can simulate a good voltage until you actually pull it out and test it,unless you have a transistor tester that does it in circuit,. replace them and check

Vic, After you get your replacement parts, ohm out the solder pads to make sure there isnt any delaminated pads your dealing with. microscopic cracks in the traces and such.,Also check for any open

Vic, One of the two transistors could have an open B/E link, with resistance on the collector to emitter.? The voltage measurements could be measuring the good transistor.? The output could be

Getting closer to the solution. Here's what I found probing around: RF probe readings today (they fluctuate a bit from day to day) TP3: 384 Q911 base: 362 Note that when I attach the probe here I

This is very exciting! I learned about the sBITX project as I was making plans for getting into HF, so I've been eagerly anticipating the "ready to ship" state. While I haven't worked with rpi before,

Thanks for the tempting offer. There is no more space under our bed!