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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Gordon Gibby
Well... now ALL of them are sold.? ?Glad I counted them this morning in the car and they seem to all BE THERE.? ?I'll work on envelopes tomorrow morning and hopefully get them ALL in the mail.? ?
Then maybe order some more. As folks BUILD this little mod, can you indicate how you installed it,? what the problems or tricks you discovered?? ? i sure hope people can figure out how to do it --- be sure to use the correct relay because these relays DO SEEM TO BE POLARIZED --- Maybe pay some attention that your relays actuall do work when installed!? ?If you flip a relay to the other side of the board --- YOU CHANGED THE ORIENTATION of the voltage applied to the coil --- and as I discovered the hard way, doing it incorrectly means they won't operate!? ?? Cheers, gordon |
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Re: si5351 crosstalk
#radiuno
we could also feed the four Vdd inputs thru choke inductors too!?
-Justin N2TOH? |
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Re: HELP
raymond bisseker
¿ªÔÆÌåÓýHi Tom, Thanks for your info.....It may be a bad earth connection to the key socket, I'm reviewing the wiring, also a possible problem caused by?the anodised alli front panel...Again, thanks for your help....73 Raymond
PS.. At the age of 81, My usual rigs involve Tubes? From: [email protected] <[email protected]> on behalf of Tom, wb6b <wb6b@...>
Sent: Monday, September 10, 2018 11:55:48 PM To: [email protected] Subject: Re: [BITX20] HELP ?
Hi Raymond,
The best starting point probably would be to check the voltage on pin 2 (Blue wire) from the Raduino board to the key jack and make sure it goes to 5V when the key is open, to 0V when the key is closed.? You could trace that back to the pin A6 (marked pin 10 on the schematic) on the Nano board and check the voltages there. Some recent post have had issues with solder connections, such as bridges. I the case I remember seeing the issue was with the rotary encoder not working, but it points to some issues are cropping up with the boards. Also check the ground and Vcc voltages to the Raduino to make sure the power supply are proper. Tom, wb6b ? |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Gordon Gibby
¿ªÔÆÌåÓýSo it¡¯s actually pretty easy.Go to the file section here, or to the github repository under my name, download the zip file which has all of the files necessary for the fabricator to create the printed circuit boards.
Go to and enter their process for getting a quote on 10 boards. ? The board size is 2.5 x 2.8¡°, and their website can Convert to millimeters. ?(or you can)
Select ?a two layer board, with white silk screen, and beyond that take all of the defaults. ? They will ask you for permission to change something to an alternate at their discretion, which is fine
At some point they will ask you to upload the file, and there you insert the zip file. ?
They will do just a little bit of analysis and then tell you that it has to be reviewed, which depending on the time of day in China, can happen within an hour or might take overnight.
If you check back, you will find it has been accepted, and then they will allow you to pay them using PayPal..??I would select DHL shipping, the total price for me in US dollars is $20 for 10 boards. ? That seems to be an extra special deal!
My boards arrive in just about a week.
It is pretty astounding.
If you have any problems, send me a screenshot and we can try to figure out
Gordon
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Re: I find This Shorted Circuit on Raduino, here the pics..plz Help?
#ubitx-help
Fabian,
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Those two pins are supposed to be shorted together on your Raduino. Though it is kind of confusing. Here's the schematic for the uBitx:? ?? Those two pins are pins 1 and 2 shown in the far upper right corner of the uBitx schematic. Pin 2 is used to send 12v from the uBitx main board off to the Raduino. Pin 1 is not connected to anything. Here is the schematic for the Raduino:?? What was pins 1 and 2 of the RADUINO1 connector in the uBitx schematic are now pins 16 and 15 of the P3 connector in the lower part of the Raduino schematic. That's unfortunate, it's much less confusing if a schematic set retains the same naming and numbering conventions. Those two pins send 12 volts into the LM7805 regulator, which creates the 5 volt supply for the Nano. So the uBitx main board only has 12 volts going into one of those pins, the other pin is not connected to anything. The Raduino board has both pins shorted together (as you have shown in your picture) and this gives 12v power to the Raduino. All is well. ? Jerry On Tue, Sep 11, 2018 at 10:59 AM, sdr freak wrote:
Look, i have find this now and i don't know is this right or wrong when look at the ubitx v3 shematic i can't even find this as a shorted circuit only crossing line in shematic.. so please help me! |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Hi Gordon I already bought K5BCQ PCBs and they have arrived. Can you explain to me how to get them in China? Thanks for your help. 73 QRO Gilles F1BFU / FR 2018-09-11 20:08 GMT+02:00 Gordon Gibby <ggibby@...>:
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Gilles - F1BFU/FR |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Gordon Gibby
¿ªÔÆÌåÓýHi Gilles¡ªI don¡¯t really know how to ship to France...and I suspect it would be cheaper for you to get them directly from China. ? Do you need help ordering from
? ? You could help out other French hams!?
Gordon
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I find This Shorted Circuit on Raduino, here the pics..plz Help?
#ubitx-help
Look, i have find this now and i don't know is this right or wrong when look at the ubitx v3 shematic i can't even find this as a shorted circuit only crossing line in shematic.. so please help me!
Is that the problem what makes my Ubitx running little false? When it is normaly and i don't have a problem with this then it's ok..but i think i should ask bescause i don't see this in the shematic diagramm like this.. I'm very thankfull to become answer for this! |
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Re: si5351 crosstalk
#radiuno
¿ªÔÆÌåÓýI just experimented with the
ClockBuilder Pro software. It does not like the SI5351 with 3
outputs and provides warnings under all conditions that I tested.
I tried everything I could think of. I switched to the 8 clock
output version, and using clocks 0, 2 and 4 it is happy. So my
recommendation would be to change to the SI5351ABGM. The clocks
should then be much cleaner.
Howard |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Hi Gordon Is possible to send me a PCB in France ? 73 Gilles F1BFU/fr 2018-09-11 14:38 GMT+02:00 Gordon Gibby <ggibby@...>:
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Gilles - F1BFU/FR |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Gordon Gibby
Wow!!!? ?Looks like 21 of the 25 boards? have already sold in about 4-1/2 hours since I put up the ebay --- I expect I'll be able to mail all of those out tomorrow as I have a day off from work....then I'll see if I should order more.??
Hope this helps out people.? ?I'm going to try and keep some records so the IRS doesn't accuse me to hiding income..... Again, for any who are doing a LARGE project, the zipped Gerber files are available both in the FILES section here, and on github --- $20 gets you 10 boards from pcbway.? ? Cheaper than I can turn them around!? ?I have to go to 25 boards to get the cost per board down to roughly that same "introductory" pricing they have.?? Our ARES group is gearing up for the ARRL Simulated Emergency Test...I sure hope at some point I get the chance to actually sit down and fiddle with my uBitx soon....the matched filters arrived and now I need to order some of the binocular toroids....what a great group this is! Gordon |
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Re: si5351 crosstalk
#radiuno
ClockBuilder assumes you are using the si5351 to replace fixed oscillators.
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Our vfo at clk2 has to operate continuously over a 30mhz range, you can't run ClockBuilder every time you twiddle the tuning knob. But ClockBuilder can give you some idea of the tricks that only SiLabs knows about for getting the cleanest possible clocks out.? Some are counter-intuitive.? What we have now is simple and almost good enough. Could be that with some $0.10 clock buffers it will be good enough. In addition to crosstalk and spurs, there's also phase noise. We might be able to bring that down by 50% with a minor software fix. In particular, use integer output divide mode on the clk2 vfo, driven from pllB using a fractional pll feedback divider.? Perhaps use an integer output divide on pllA for clk1, and a fractional output divide of pllA for clk0 for the bfo which is of the lowest frequency and thus the least critical.? Or add a second si5351 chip. Or move to an si5338 or s5340.? But nobody's complaining about phase noise yet.? The si5351 is likely far better than traditional analog vfo's for phase noise. Note that clock spurs are different than the spurs?everybody is talking about in this forum.? Particularly that 45mhz-Carrier spur, and spurs due to?coupling from power amp to IF amps. Nobody has complained about si5351 clock spurs yet. Somebody here was selling a raduino with an si5351c, has the 8 output pins with four? Vcco pins in a $10 QFN20 package. Called it something like the "whole lotta clocks raduino" Might be worth checking to see how that does on crosstalk between clocks. Though adding three $0.10 buffers would be cheaper if all you want is 3 clocks. I have heard that if only using two of the $1 si5351 MSOP10 clocks, best off to stick with clk0 and clk2.? Since clk1 is placed between the clk0 and clk2 in the physical die, we have minimum crosstalk if clk1 is held low.? So perhaps two si5351's, using clk0 and clk2 on each on for a total of four possible clocks? Can use pllA on clk0, pllB on clk2, both can have integer mode output dividers for minimum phase noise. Jerry, KE7ER On Tue, Sep 11, 2018 at 08:30 AM, Mark McNabb wrote: Not sure if this will help or not, but just saw this on the SILabs forum posted by an employee: |
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Re: si5351 crosstalk
#radiuno
Mark McNabb
Hi,
Not sure if this will help or not, but just saw this on the SILabs forum posted by an employee:
73, Mark. |
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Re: si5351 crosstalk
#radiuno
I heard earlier and confirmed today that si labs had given certain recommendations regarding crosstalk on si5351a chip here is the link to the related page,. Hope it serves our cause too. regards sarma ?vu3zmv On Tue, Sep 11, 2018 at 8:06 PM Gary Anderson <gary.ag5tx@...> wrote: Carl, |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
¿ªÔÆÌåÓýHello Gordon, ? Order placed. ? Thank you sir for taking on this project. ? Ripley ? Sent from for Windows 10 ? From: Gordon Gibby
Sent: Tuesday, September 11, 2018 8:38 AM To: [email protected] Subject: Re: [BITX20] Right-sided relay harmonic attempted fix for v3/4 ubitx ? AVAILABLE AGAIN! ? Found the package of boards sitting on a neighbor's doorstep.? Hooray!? ?Managed to get the listing re-activated (eBay isn't that easy to figure out....but I got it).?? ? ? ?I found I can mail either 1 or 2 in a first class envelope to anywhere that the United States Postal Service can mail -- now that I know what they charged me, I can sell in groups of 1 or 2 boards, and will endeavor to put $1 refund in any orders of 2.? ? ? Again, the GERBERS are freely available so if you wish to take on this project for a club or group, you can simply order 10 boards for about $20 (including shipping) directly from pcbway.com yourself and save quite a bit of $$.? ?I'm just providing these onesies and twosies for the folks who cant/don't want to order pcbs themselves.? (e.g., if you order 4 boards, I'll ship as two envelopes of two boards each to make sure I stay on the good side of the USPS, as a non-machineable first class envelope of minimal thickness) ? ? With all the fixes for the SPURS being developed and tested by Warren, Raj, and so many others....wow!? y'all are giving great ideas to the manufacturer and this product will become even better with all the suggestions y'all and Allison and others have been making.? ?The ham community will benefit from all the volunteer wisdom being donated. ? Cheers, ? gordon kx4z From: Gibby,Gordon L ? Well, we have an unexpected setback. ? The powers that be in my neighborhood concluded that our mailboxes were not uniform enough, so they spent our money and pulled up all of our existing mailboxes and put new ones in, .....without any house numbers. ? Things have to be done just so are they aren¡¯t happy, so none of us have even touched the new $500 mailboxes.? ? Not realizing that risk, I signed for DHL to deliver the $50 worth of printed circuit boards from? China without a signature, since I was expecting to be at work....no way to sign for them.? ? ? They were delivered all right, and even a day earlier than expected ¡ªbut nobody knows where!! ?About 230 this afternoon, somebody got the package (based on the tracking information). ?I have emailed everyone in my homeowners association hoping someone found the package..... ? If not, I guess I am out the $50 and will decide whether to re-order the order again. ? ? Such. Is. Life. ? One step forward, two steps back? ? Gordon.?
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Re: si5351 crosstalk
#radiuno
RCboatguy,
The problem may not be the supply line but the ground line and even if there are more? its still current flowing on internal ground buses and the bulk silicon. The only way to know is test. Allison |
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Re: si5351 crosstalk
#radiuno
I am wondering if we could use the 8-output version of the Si5351 instead of the 3-output version to reduce the cross-talk.? The 8-output version has separate Vddox inputs per pair of clock outputs instead of sharing 1 Vddo supply pin across all three outputs.? If we used only used 1 output from 3 of the 4 pairs, we'd at least separate the supplies for each output we use, and each supply pin can have its own decoupling cap.
73, Carl,? K0MWC |
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Gordon Gibby
¿ªÔÆÌåÓýAVAILABLE AGAIN!
Found the package of boards sitting on a neighbor's doorstep.? Hooray!? ?Managed to get the listing re-activated (eBay isn't that easy to figure out....but I got it).??
?I found I can mail either 1 or 2 in a first class envelope to anywhere that the United States Postal Service can mail -- now that I know what they charged me, I can sell in groups of 1 or 2 boards, and will endeavor to put $1 refund in any orders of 2.?
?
Again, the GERBERS are freely available so if you wish to take on this project for a club or group, you can simply order 10 boards for about $20 (including shipping) directly from pcbway.com yourself and save quite a bit of $$.? ?I'm just providing these
onesies and twosies for the folks who cant/don't want to order pcbs themselves.? (e.g., if you order 4 boards, I'll ship as two envelopes of two boards each to make sure I stay on the good side of the USPS, as a non-machineable first class envelope of minimal
thickness)
With all the fixes for the SPURS being developed and tested by Warren, Raj, and so many others....wow!? y'all are giving great ideas to the manufacturer and this product will become even better with all the suggestions y'all and Allison and others have been
making.? ?The ham community will benefit from all the volunteer wisdom being donated.
Cheers,
gordon kx4z From: Gibby,Gordon L
Sent: Monday, September 10, 2018 9:38 PM To: [email protected] Subject: Re: [BITX20] Right-sided relay harmonic attempted fix for v3/4 ubitx ?
Well, we have an unexpected setback.
The powers that be in my neighborhood concluded that our mailboxes were not uniform enough, so they spent our money and pulled up all of our existing mailboxes and put new ones in, .....without any house numbers. ? Things have to be done just so are they
aren¡¯t happy, so none of us have even touched the new $500 mailboxes.?
Not realizing that risk, I signed for DHL to deliver the $50 worth of printed circuit boards from?
China without a signature, since I was expecting to be at work....no way to sign for them.?
They were delivered all right, and even a day earlier than expected ¡ªbut nobody knows where!! ?About 230 this afternoon, somebody got the package (based on the tracking information). ?I have emailed everyone in my homeowners association hoping someone
found the package.....
If not, I guess I am out the $50 and will decide whether to re-order the order again.
Such. Is. Life. ?
One step forward, two steps back?
Gordon.?
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Re: Simple spur fix
Warren Allgyer
Raj
The green display line is set at -43 dBc for a 33 dBm carrier level. None of the harmonics comes close to that level. The harmonics are higher than I would like but certainly acceptable. The test filters I used are not as good as the LPF supplied with the radio, once they are removed from the uBitx board. I am working to test a third party four filter board that will allow the uBitx filters to be transplanted to it. That will bring even these harmonics much lower. WA8TOD |
sdr freak
Ripley