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I realize this isn't part of the bitx, but it was developed in the same spirit as the bitx project, so forgive me if I ask a few questions. Firstly, if anyone has built this, can you give me any

Here's some DC readings: /g/BITX20/files/K7AGE And some AC: /g/BITX20/message/22764 ( /g/BITX20/message/22764 ) A few random hints:

well I removed d7 and c130 and it doesn't smoke anymore but still not working. I hooked up the antenna. makes weird noise from speaker with no static but what I did notice is if I tune around in

Yes, the mic is a Baofeng style handset.? It seems to me that I ended up switching two of the leads from the Miklor diagram to get mine to work as well.? Unfortunately, I do not remember what

Is there a document that shows the proper DC and AC/RF voltages at various places on the latest BitX40 Board from India? My receiver is working, I’m now trouble shooting the transmitter. Thanks?

Is the "BTech" mic you are using a Baofeng style mic? ?I had issues wiring mine according to the Miklor diagrams. ?I had to rewire it to get it to work.

You guys are so far beyond me with your knowledge and terminology that I had to go read something like this prep article to be able to understand what you are discussing:

His -10dbm vfo is going into the rf port of one of the mixers, as shown in the block diagram near the top of that webpage.

By "carrier", perhaps you mean the incoming signal to the RF port. That does make sense. But will vary wildly with the type of mixer. A level 17 diode ring mixer can take a much bigger rf signal than

Here's a more complete quote from that webpage, also showing the previous paragraph. ?He's got some high level diode ring mixers that want +17 dbm and +7 dbm at the local oscillator port. ?The

Well that makes sense. A 50 ohm load is asking an awful lot from the CMOS output of the si5351. The si5351 has only one pin for the 3.3v rail. Loading multiple outputs heavily means the internal 3.3v

It's good you posted this information with such a clear photo. But I have a thing about giving credit where credit is due, especially if that source can give needed additional details. The

You can put them back if you wish after testing, but "they aren't serving any purpose and can be removed from the board" means you don't have to. K1 is one of the two big black boxy things on your

Don't forget to add the two 1N4148 protection diodes as shown at http://barrie-wax-group.blogspot.ca/2017/04/minimum-bitx40v3-hacks.html (

the comment is here under quote " When I first built the LO system I did not pay attention to setting the VFO output level and for reasons I can't remember, the VFO output was 0 dBm. After connecting

In a mixer , if the carrier level is above -10dbm, spurs do occur. we can try to reduce the level by changing the attenusator and try . I had read this today as a comment by weshaywards. i shall soon

Hello ! I'm sorry but the spurs are getting worse if I terminate all outputs to 50 Ohms ! If only one ouptut is activated the signal is clean ! Does someone did similar measurments on Raduino in

You mean remove just temporary for testing?? I'm guessing k1 is the solenoid switch right Barrett KG5SSO

Amendment: *your* multimeter ... I assumed it to be a modern digital one. The old analog 'originals' measured Current - again, always - a completely different philosophy that relied on the current

Here's an old post on diode RF probes and AC measurements in the Bitx40 power amp: ? ?/g/BITX20/message/22764 ( /g/BITX20/message/22764 ) And the bottom paragraph