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John, where you show the resistor from C51 to ground in the picture should have no effect.? According to the schematic AND my measurements, that side of C51 is already grounded through M1 on the

A very good question. I assume this was a boost converter (not buck) on a 12v supply, boosting voltage to the IRF510. If the main Bitx40v3 board saw more than 12v, then likely had some flash, pop and

Can anyone confirm whether any of the HF cases have the ledge for a panel kit? If not, how do you add a panel to these? I have a Pelican 1520 with a panel kit added, and I made 1/8” aluminum

OK Franz, now we know what the problem is: DIT touch sensor: 3 us DAH touch sensor: 1 us touch sensor detected: NO At startup, the timeconstant of the DIT and DAH sensors is measured (it can vary on

Blindly mixing 5v and 3.3v devices like your Nano and LCD and Si5351 may work. Or may not. Might even destroy something. I'd definitely follow Rod's advice and remove the pullups on any 5v i2c

Ashar, Thanks for the clarification on the CW mode. I too am a CW op and don't mind using an external keyer to give me all the memories and things as well. I am assuming that if the straight key

One additional question: Did you connect the buck converter only to the PA power lines or to the whole BITX40? Verzonden: 21 December, 2017 20:46 Aan: [email protected] Onderwerp: Re: [BITX20]

If you are fine with a straight key or with an external keyer of some sort, then it should be quick to modify the sketch to remove the internal keyer and use? the wire for keying as a digital input

I just ordered two. If they turn out to be of decent construction, I will get a couple in a larger size for my CERT radio kits. Nice find on the coupon! 73 de bill K7WXW

Ok. I'll do the prod tests. Maybe not tonight?? I've been cutting into my sleep time way too much to try and get this done. That's probably increased the frustration factor. Cutting 2 hours out of

Raduino Diag v3 starting up… TX-RX line insta Raduino Diag v3 starting up… TX-RX line installed: YES PTTsense installed: YES DIT touch sensor: 3 us DAH touch sensor: 1 us touch sensor

Well, the Nano takes 5V so that has to be floating around somewhere and most LCD's are 5V devices. (Many TFT are 3.3V.) Jack, W8TEE To: [email protected] Sent: Thursday, December 21, 2017 2:39 PM

"Success! Maybe there's more that can be done at Q6, but it is MUCH improved with a 10k resistor to ground at the output of C51. Still Could be multiple causes, so still worth experimenting. I'll dig

Please be aware that those I2C adapters pull the I2C lines up to +5. If you have 3.3v I2C devices in the system, like SI570, and others, then the +5 I2C exceeds their specs. See my earlier post on

Amen!! Mike K5ESS Sent: Thursday, December 21, 2017 12:59 To: [email protected] Subject: Re: [BITX20] Help! I think I may have just ruined my 9 year old's Chanukah ...retirement is the best

They're not too expensive and work quite well. See ebay #201042782490 Jack, W8TEE To: [email protected] Sent: Thursday, December 21, 2017 11:55 AM Subject: Re: [BITX20] CW Key/Keyer/paddle idea

Actually, I wasn't thinking of that, but rather just as a check for the 10 minute station ID we all forget about. I have a routine (somewhere?) that calls an input routine to set the time. The bad

Tausciam: You're a very bright fellow for sure to pass all those exams in only 3 months. If you decide you would want to venture forth a bit further, go for it!!!! If you simply measure the

It looks you could squeeze the banggood EF01 case inside the next size up harbor freight apache case for you guys traveling doing demos and shows.

Very kewl. As a matter of interest, my old NorCal KC1 keyer has a straight key input - finally found the documentation to hook it up. So now plenty good CW until a possible upgrade improves