With the PA filters removed from the motherboard and constructed
externally with two relays per filter and better layout and isolation,
the harmonics on all bands are compliant with the existing filter
component values. With the addition of the R27 45 MHz filter with a 12:1
impedance transformer between the filter and the following mixer, my
uBitx is also now compliant for spurs. What remains for compliance is
confirmation of appropriate levels of intermodulation distortion.

There is no FCC or ITU standard for intermodulation distortion. There is
a standardized measurement procedure. Chapter 25 in the ARRL Handbook
details it. But what comprises an acceptable level is left to equipment
suppliers and specifiers. IMD is measured by putting 2 audio tones
within the 3 KHz SSB passband and generally 1 KHz apart at equal levels.
The resulting sideband signal is examined on a spectrum analyzer and the
level of the mixed products of the two tones is measured and compared to
the tone peaks themselves. It is generally accepted that the 3rd and 5th
order products should be a minimum of 24 dB below the level of either
tone. Military specifications often require as much a 36 dB difference.
IMD generally improves as you reduce power and gets drastically worse
with over driven RF stages. I generally consider the power level which
gives at least 24 dB of 3rd and 5th order suppression to be the maximum
useable level and this is the test standard used by many equipment
manufacturers.

With that as background I set about testing the now compliant radio.

Unfortunately there seems to be no power level at which 80 and 40 meters
can achieve 24 dB in my radio. On 80 meters the best I could achieve as
I varied the power level from 100 mW to 10 watts was 19 dB. And that was
at 100 mW. Audio input in this case was 30 mVrms and reducing it by as
much as 10 dB did not improve IMD. It only limited the maximum power
that can be achieved. Power level in these tests was varied with RV1.

On 40 meters the best IMD achievable was 12 dB.

20 meters was the first band where I could achieve a 24 dB reading and
that was at 1.5 watts out. At any higher power level IMD rose
dramatically. At 5 watts it was 16 dB.

I stopped my tests at this point. Such levels are not useable in my
opinion and only get significantly worse as external amplifiers are added.

WA8TOD

>>Did you buffer all three outputs in your test?? And measure the buffered one only or all three?

All three with the 74AUP wich are one inverter per package.

>>I don't have access to 74LVT04 but used 3 x 74LVC04's (SOT single versions)

I didn't try the hex inverter part (6 inverters per package).? I suspect that needs testing?
as you run into the same issues of common busses on the die for power.? So that part
could (untested) also have cross talk.

Of course with fast rise/fall time transistions the layout should look like VHF/UHF
ground planes and top pour of ground copper.??Bypassing is also important and
watch for ground loops.

Allison

Hi All:
I just received myNextion 3.2 basic today, I cannot get any files to upload with the with the SD card (formatted with fat32 one tft file) or the editor. The editor send a connect failed: forced interrupt error and the sd card error: Model does not Match?device model: NX48320T035_011R. Possible I am using the wrong version software? Not finding any with help with google. Any help is appreciated
Thanks and 73

Fabian,

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

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@...>:

Hi Gilles—

I 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

On Sep 11, 2018, at 13:55, F1BFU - Fr - 79 <gilles.f1bfu@...> wrote:

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@...>:

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 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 —but 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.?

On Sep 9, 2018, at 18:50, Ripley <bob.ripley@...> wrote:

Hello Gordon,

Good to hear. I am looking forward to purchasing a few.

Ripley

The words are mine but this iPad does what it will with them.

On Sep 9, 2018, at 4:58 PM, Gordon Gibby <ggibby@...> wrote:

Hi folks....
25 new blank boards for the simple-minded right-sided relay board fix are supposed to arrive from China on Tuesday.? ?If so, I'll re-enable? the Ebay advertisement and up the "count" (a learning experience) on Wednesday.? ?Was able to mail out five boards on Friday before leaving on a camping trip.? ?Hope they arrive OK!!!? ?I figured out how to mark them as "shipped" and send a note to each purchaser through Ebay.? ?With all the SPUR FIXES now being discovered, things are really shaping up around this little transceiver to make it have much fewer spurious responses.? ?Delighted to see the group progress.? ?Each person proceeds at? their own pace, but the group moves forward huge amounts.

Cheers,
gordon KX4Z

--

Gilles - F1BFU/FR

--

Gilles - F1BFU/FR

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!

Hi Gilles—

I 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

On Sep 11, 2018, at 13:55, F1BFU - Fr - 79 <gilles.f1bfu@...> wrote:

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@...>:

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 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 —but 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.?

On Sep 9, 2018, at 18:50, Ripley <bob.ripley@...> wrote:

Hello Gordon,

Good to hear. I am looking forward to purchasing a few.

Ripley

The words are mine but this iPad does what it will with them.

On Sep 9, 2018, at 4:58 PM, Gordon Gibby <ggibby@...> wrote:

Hi folks....
25 new blank boards for the simple-minded right-sided relay board fix are supposed to arrive from China on Tuesday.? ?If so, I'll re-enable? the Ebay advertisement and up the "count" (a learning experience) on Wednesday.? ?Was able to mail out five boards on Friday before leaving on a camping trip.? ?Hope they arrive OK!!!? ?I figured out how to mark them as "shipped" and send a note to each purchaser through Ebay.? ?With all the SPUR FIXES now being discovered, things are really shaping up around this little transceiver to make it have much fewer spurious responses.? ?Delighted to see the group progress.? ?Each person proceeds at? their own pace, but the group moves forward huge amounts.

Cheers,
gordon KX4Z

--

Gilles - F1BFU/FR

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@...>:

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 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 —but 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.?

On Sep 9, 2018, at 18:50, Ripley <bob.ripley@...> wrote:

Hello Gordon,

Good to hear. I am looking forward to purchasing a few.

Ripley

The words are mine but this iPad does what it will with them.

On Sep 9, 2018, at 4:58 PM, Gordon Gibby <ggibby@...> wrote:

Hi folks....
25 new blank boards for the simple-minded right-sided relay board fix are supposed to arrive from China on Tuesday.? ?If so, I'll re-enable? the Ebay advertisement and up the "count" (a learning experience) on Wednesday.? ?Was able to mail out five boards on Friday before leaving on a camping trip.? ?Hope they arrive OK!!!? ?I figured out how to mark them as "shipped" and send a note to each purchaser through Ebay.? ?With all the SPUR FIXES now being discovered, things are really shaping up around this little transceiver to make it have much fewer spurious responses.? ?Delighted to see the group progress.? ?Each person proceeds at? their own pace, but the group moves forward huge amounts.

Cheers,
gordon KX4Z

--

Gilles - F1BFU/FR