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Re: Raduino issue
I did pull the raduino out and booted it standalone. It still showed only the firmware. Would it get locked in factory mode? On Wed, May 23, 2018, 2:45 PM Sam Tedesco <stedesco619@...> wrote:
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Re: toggle for low output and max output?
#ubitx
Allison,
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I think VK2ETA's approach is good enough for adjusting the power out by a few dB. He moves where the transmitted signal lies within the 45mhz filter response, taking it down the skirts to attenuate.? The filter is fairly broad, so the frequency? response of our 2khz bandwidth audio is not significantly affected. On receive, the desired signal is put back in the center where it belongs. ? ??/g/BITX20/message/46235 ? ??/g/BITX20/message/46241 It could be that this technique raises the level of some close in undesired products, but not by much if we're only talking a few dB of attenuation.. And I'm not aware of anything undesired that is close enough to matter. If it works, this gives us a no-hardware method of attenuating the transmitted signal. Do you see any issues with this approach? This from Ian:? ?/g/BITX20/message/50144: ? ? "2.ATT function has been added to reduce RF gain (Shift 45Mhz IF)" Not clear if that's for transmit or receive. But suggests to me that he has added VK2ETA's trick to his code. One issue is that the transmitted CW signal never goes through the 45mhz filter. But that could be fixed by having CW unbalance one of the other two mixers, and adjusting the firmware accordingly. Jerry, KE7ER No matter how you do it it will require hardware with my mods or no. |
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Re: toggle for low output and max output?
#ubitx
No, just no.? We are working with a linear or trying to be linear.? Plaing with the voltage to the
finals would be bad. Allison |
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Re: Raduino issue
Thank you! I thought about that. I tried reverting to the original firmware and it was the same. Was tempted to disconnect the entire encoder but left it as is. Will give it a shot.? On Wed, May 23, 2018, 2:34 PM John <vk2eta@...> wrote: Hello Sam, |
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Re: Raduino issue
Hello Sam,
There is a good chance your Raduino is likely working and you have an issue with the encoder. Since it displays the version at start and nothing more after that it certainly looks like you have the push-button locked or shorted in the down position. In the factory firmware and the KD8CEC firmware (at least the version you are using), when the push-button is held down at start-up it first waits for the button to be released, then it enters Factory Alignment mode. That's why I suspect the push-button input is held down permanently. Easy test is to just disconnect the brown wire from the Raduino connector and see if you get the frequency displayed. All the best, 73, John (VK2ETA) |
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Re: toggle for low output and max output?
#ubitx
As this is for low power, how about separating out the power wire going to the final amp stage and using one of the buck or buck/boost converters from China that is on ebay ?? They have a pot on them and you can set the voltage very easy, especially if the pot is removed and a larger one put on the front of the ubitx. The boards are small and only a few dollars shipped from China. On Wed, May 23, 2018 at 4:15 PM, ajparent1/KB1GMX <kb1gmx@...> wrote: No matter how you do it it will require hardware with my mods or no. |
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Re: spurious signals on FT8
#ubitx
Input levels to any transmitter for any digital modes ARE critical. There are guidances published in various places about how to set up the modulation levels, some give exact instructions for good results and some are more vague and don't give such good results. I ran into difficulties running PSK31 some years ago and learnt the hard way. Now I'm preparing to get going with these new modes and am studying the setting myself so I can't give off the cuff help.
There is one general pointer I can repeat - when you arrive at a suitable level back it off some 5% or even 10%. Good luck. |
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Re: Raduino replacement
#bitx20
Mike aka KC2WVB
Sure, its fun. Just like girls used to be.? I may just order another whole kit myself too. I can always build an analog VFO for the one I have. That would keep me out of trouble. Best wishes. Mike On Wed, May 23, 2018, 4:29 PM Bo Barry <bobarr@...> wrote: Just saw an idea for a use for the Raduino so I'll order a whole kit.? |
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Re: RF power chain mods and improvements..
Mike,
That is true but let me finish first.? ?You can buy them and try them too and see if with a sample size greater than 1 it behaves. As a QRP rig it RX power needs are really good at around 160 ma .? On TX it consumes power with up to 5 relays and all the stages with high bias with no modulation its idle current is between 600 to 800ma and reaches over 2A.? For reasonable battery ops use a big battery. Allison Yes its a cute thing and fun to ponder mods for. |
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Re: Raduino replacement
#bitx20
Mike aka KC2WVB
Good idea, Bo.? The only thing I worry about is, what if there is more than just a Raduino that is at issue with the one I received. I don't want to sell you junk.? If you were nearby in NY State I'd hand deliver it to you and if there was an issue I'd just take it back. To mail it back and forth cross country, should there be an issue with it, becomes why did we bother fast. I sent teamhfsigs@... a request at 1pm NY time today. I'll give them a day or two to see if they can ship out the part. If not and your still willing then I'll pass the one I have to you if you want it. Mike On Wed, May 23, 2018, 3:52 PM Bo Barry <bobarr@...> wrote: Sell me yours and order a new one. ? I don't want the Raduino or display. Bo W4GHV? |
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Re: toggle for low output and max output?
#ubitx
No matter how you do it it will require hardware with my mods or no.
The easy solution is hard to implement as the places to put it are scarce and they must be in the TX only path. The most seemingly likely is two RV1 pots with a relay to select the one you want and a button on the front panel to activate the relay during transmit.? Problem is where to put the RF parts so there? aren't dragging wires all over and causing havoc. The most obvious place is? near the edge next to K1. or as a flying PCB with a relay, diode, two RV1s that drops into the old RV1 spot and two flying wires for switching.? Lots of assumptions for space to place things.? Using a tiny relay helps. Allison |
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Re: Raduino replacement
#bitx20
Mike aka KC2WVB
Thanks, I will talk to Bo about this. The email address listed on the help page is an error too. The address that reaches them is: teamhfsigs@... On Wed, May 23, 2018, 12:50 PM Jerry Gaffke via Groups.Io <jgaffke=[email protected]> wrote: I kind of thought there was a buy option, and that maybe it was removed when they redid the website for the uBitx. |
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Re: ND6T AGC implementation for uBIT-X
¿ªÔÆÌåÓýHello KeesAs I understand it for France and for 1 kit each pay $ 14 port. But what is the price for both kits? Please help me. Gilles F1BFU
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Re: ND6T AGC implementation for uBIT-X
OK, the pass 2 boards have arrived, they look good so, let er' rip.
Ordering instructions are in the attachment and a copy is in the Files section under my call. Not sure how all this is going to work out due to the qtys ....let's see. Please remember I'm still only one retired guy sitting at one table. 73 Kees K5BCQ |
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Re: Raduino CAD Files
Curious.? According to section 4.3 page 27 of that document, the debugger burned into ROM supports:
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? ? USART? (or UART),? USB,? I2C,? SPI,? and? CAN I know the UART can be spoken to directly from the Arduino. Not sure about the other options. UART is probably fast enough for most of us at 57600 baud. Even if you have 512kbytes of flash to load, that's still only 512*1024*10/57600 = 91 seconds. That's just the raw UART transfer times, protocol used and waiting for flash to program will extend that best case time. I'll stick with my UART. Jerry On Wed, May 23, 2018 at 08:27 am, Jerry Gaffke wrote:
2) Use the UART debugger permanently burned into processor ROM by ST at the factory. |
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