You will want to move to the current firmware and memory manager (currently 1.1 but 1.097 will work as well). I'm not sure there was proper S-Meter function in 1.07x. http://www.hamskey.com/2018/09/ub

https://groups.io/g/BITX20/topic/27834998?p=Created,,,20,1,0,0 https://groups.io/g/BITX20/topic/28049653#61619 https://groups.io/g/BITX20/topic/28088828?p=Created,,,20,1,0,0::recentpostdate%2Fsticky,,

#ubitx

I understand that you're accurately reporting the latest comment from Farhan. My V3 board was equipped with Virtual VRS2H-S-DC12V-C relays. It looks like the HFD27 relays in the current board were an

#ubitx

Another member just received a new µBITX board and it has new relays. Farhan reported that to be the case but we hadn't yet seen a board with the new relays 'in the wild'. There's been no assessment y

#ubitx

Hi Ripley, Thank you for the clarification! My intent was to relate to Jerry that the bidirectional RF amps were still stock. The amp immediately prior to the filter (that used to feed the mixer direc

#ubitx

A number of people are working to meet different thresholds of 'take care'-edness (two more times in print and it's a real word). A few (probably in a nod to the phase noise wars) are pushing for a st

#ubitx

Not 'revising' but 'revisiting'. soz Two other bits. Earlier in this thread Farhan reports the benefit of changing R26 and R46 to 220 Ω from 470 Ω. This is for the stock amps, though - no idea if this

No worries Nick - nothing wrong with circles. hi hi Revising the thread I see that you were part of it - sorry for the redundant link. Here are Allison's suggestions for the two RF amps: https://group

Thanks Paul. I wanted to try it there to see how well it worked. Going in, I wondered to myself how I'd know if it started to oscillate - it wasn't hard to notice. hi hi As it is, turning the pot more

Respectfully, the point of being a ham is to learn about electronics and RF. The point of the BITX radios is that we have a base radio to mod and explore and learn from/with. Toroids are really easy t

#ubitx

The amp isn't running as cleanly in the radio as it did on the bench. With the gain turned up past about half way, the amp breaks into oscillation with the first sound hits the mic. Turning it down an

https://groups.io/g/BITX20/topic/28088828#61869 Farhan has solved the spur problem twice, possibly three times. As it appears to actually have been resolved, and as Farhan has confirmed that productio

#ubitx

He posts here regularly. He's also posted in the various threads about relay replacement (he reported that current production boards have relays that bring harmonics into compliance) and various spur

#ubitx

http://www.arrl.org/news/amsat-s-fox-1cliff-cubesat-ready-for-launch

https://www.youtube.com/watch?v=Wq8kS6UoOrQ Go Exseed Space!

You could add relays and pots to adjust power across bands. I'm thinking about using the current system for 'max out' and a second layer for 'max 5W out' when feeding my WA2EBY. https://ubitx.net/2018

Until then, we have it in the files here. https://groups.io/g/BITX20/files/bitx_with_raduino.zip 73 Andy KG5RKP

The stock µBITX has a drive adjustment at RV1 - the pot that follows the first stage in the RF chain (Q90). I've used mine to drive a WA2EBY amp on 40 meters and adjusting RV1 was all it took to drop

https://www.youtube.com/watch?v=Wq8kS6UoOrQ T minus 11 hours

Hi Tim, That's an interesting sounding tip - thank you. I'm fairly new to SMD and have just used the thin pencil tip on my Weller iron. It's worked OK so far but there's likely plenty of room for impr