Nice!
what is the WX. Hip?
secondly does all of our workbenchs look the same. ?Good thin the cases are flat in the back to push the last broker further back on the bench with all the leftovers!
n2aie
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Does anyone have a file with the UBITX? EEPROM map as delivered from the factory? I had to replace the Nano board, but now don't have the proper EEPROM settings to get going again.
Joe
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Re: KD8CEC firmware and tuning speed
#ubitx
Hello Mike,
If you press and hold the encoder for about two seconds you access the "Tune Step" adjustment menu. Values range from 10Hz per step up to 200Hz per step which allows you to quickly tune though a band.
Alternatively for even faster continuous change, after pressing the encoder briefly and while displaying "Band Select", press and hold the encoder for more than 2 seconds, you then switch to the "General Mode" tuning whereby each tune step is 100KHz.
Another long press while displaying "Band Select" will bring you back in "Ham Band Mode".
73, John (VK2ETA)
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Re: Custom Graphics help for S-Meter
Nic job! ? You might consider posting that section of the code in the files section to that others don't have to reinvent the wheel.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
toggle quoted message
Show quoted text
On Mar 24, 2018, at 8:11 AM, Vic WA4THR via Groups.Io < vhklein@...> wrote: ...and it now looks like this:<BitX S_meter.jpg>
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Re: Custom Graphics help for S-Meter
Well done Vic, it looks really nice.
My SWR bars looks too "fat" in comparison so I need to adjust the characters and the code.
73, John
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Re: Custom Graphics help for S-Meter
...and it now looks like this: 
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The other thing I've found is it makes listening a lot more pleasant. I shift mine about +700 hz and it really cuts the background hiss and improves the audio, on SSB. Is there a way to store that in Memory?? The CEC software upgrade is really nice.?
On Sat, Mar 24, 2018 at 8:54 AM, Paul Galburt - K2AYZ <galburt@...> wrote: Which version did you load?
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Which version did you load?
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Re: Custom Graphics help for S-Meter
Thanks, John! That last hint was the problem. I had been switching between printLine, where the line number being printed is needed, and print, which prints starting at the last cursor position, so "lcd.pnt(1," ") was the problem and why I was seeing a series of 1's displayed. I changed all my references to just lcd.print(" "), or similar, and the graphical S-meter is now displaying properly with the rest of my code.
Also, since I was getting warning messages about my code size approaching maximum limits, I commented out the touch-key sections to save room and eliminate that warning. That didn't "fix" anything, but was probably a good thing to do.
Fantastic to get such help for a newbie in this sketch language.
=Vic=
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KD8CEC firmware and tuning speed
#ubitx
I installed Ian's excellent uBitx firmware last night, version 1.04. I haven't played with the memory manager yet but I will today.
One feature that seems to be gone is what I call "ballistic" tuning. With the old firmware, when the encoder was turned rapidly, the frequency would move significantly. The new CEC firmware doesn't seem to do that anymore. Is it an option that can be turned on again or was that removed to add all the other excellent features currently in the firmware?
Best regards and 73
Mike M.
KU4QO
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Re: How to adjust the contrast of LCD so that the characters are clearly read!
Thanks for your information.?
Patrick?
The contrast control (pot) is mounted on the Raduino facing towards the display. There is no brightness control (although you can add one)!
Mike ZL1AXG
Would anyone tell me how to adjust the contrast, not only the brightness, of the LCD, so that I can read the characters without tilting the whole chases or adjust my watching angle.? Thanks Patrick Ma?
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Re: 13.8 v power supplies safe for bitx?
as many are enjoying TDA2822 failures,? better to drop the supply to TDA device to say 8 or 9V? while using 13.8 for balance circuitry.
On Sat, Mar 24, 2018 at 4:19 PM, Walter <W9KJO@...> wrote: On Tue, Mar 20, 2018 at 01:00 pm, Tim Gorman wrote:
Walter,
I have a 1 amp fast-blow fuse on the red lead going to the main circuit
board and a 2 amp fast-blow fuse on the brown lead going to the power
amp circuit.
My ammeter shows 2 amp peaks on the very loudest audio into the mic.
This load apparently doesn't last long enough to blow the 2amp fuse.
Usual peaks are around 1 amp
I've never seen the current go above about 250ma on receive even with
the volume control way up on a strong signal. My TDA2822W chip never
gets warm under normal use. I have used an 8ohm speaker and a 16ohm
speaker to test the current draw. I use a mono jack on the speaker lead
and a permanently wired internal speaker that the mono jack disconnects
when an external speaker is plugged in.
I suspect I can get by with a 500ma fast-blow fuse on the main board. I
might try that the next chance I get.
tim ab0wr
On Tue, 20 Mar 2018 07:16:13 -0700
"Walter" <W9KJO@...> wrote:
On Thu, Mar 15, 2018 at 06:12 pm, Tim Gorman wrote:
Jerry,
I'm not sure everyone understands what foldback current limiting
is. Your message 40729 explains it well. In action it is like a
fuse. The power supply opens the power lead until the operator
takes an action.
It is not the same thing as current limiting.
I don't have any power supplies with foldback current limiting so
for me a fuse is the next best thing.
tim ab0wr
On Thu, 15 Mar 2018 16:46:37 -0700
"Jerry Gaffke via Groups.Io" <jgaffke=[email protected]> wrote:
True.? The standard current limiting supply I described is not
something to lean on to avoid driving the final too hard, that's
not what I was suggesting. If there's a current limit on the
finals, should be foldback current limiting:
/g/BITX20/message/40719
OK Great info so what size fuse?? What is the maximum safe current
for the circuit?
Thanks
?
--
73, W9KJO
Walter
I wonder if 2 amps would remain true for digital modes as well?
?
--
73, W9KJO
Walter
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Re: 13.8 v power supplies safe for bitx?
On Tue, Mar 20, 2018 at 01:00 pm, Tim Gorman wrote:
Walter,
I have a 1 amp fast-blow fuse on the red lead going to the main circuit
board and a 2 amp fast-blow fuse on the brown lead going to the power
amp circuit.
My ammeter shows 2 amp peaks on the very loudest audio into the mic.
This load apparently doesn't last long enough to blow the 2amp fuse.
Usual peaks are around 1 amp
I've never seen the current go above about 250ma on receive even with
the volume control way up on a strong signal. My TDA2822W chip never
gets warm under normal use. I have used an 8ohm speaker and a 16ohm
speaker to test the current draw. I use a mono jack on the speaker lead
and a permanently wired internal speaker that the mono jack disconnects
when an external speaker is plugged in.
I suspect I can get by with a 500ma fast-blow fuse on the main board. I
might try that the next chance I get.
tim ab0wr
On Tue, 20 Mar 2018 07:16:13 -0700
"Walter" <W9KJO@...> wrote:
On Thu, Mar 15, 2018 at 06:12 pm, Tim Gorman wrote:
Jerry,
I'm not sure everyone understands what foldback current limiting
is. Your message 40729 explains it well. In action it is like a
fuse. The power supply opens the power lead until the operator
takes an action.
It is not the same thing as current limiting.
I don't have any power supplies with foldback current limiting so
for me a fuse is the next best thing.
tim ab0wr
On Thu, 15 Mar 2018 16:46:37 -0700
"Jerry Gaffke via Groups.Io" <jgaffke@...> wrote:
True.? The standard current limiting supply I described is not
something to lean on to avoid driving the final too hard, that's
not what I was suggesting. If there's a current limit on the
finals, should be foldback current limiting:
/g/BITX20/message/40719
OK Great info so what size fuse?? What is the maximum safe current
for the circuit?
Thanks
?
--
73, W9KJO
Walter
I wonder if 2 amps would remain true for digital modes as well? ? -- 73, W9KJO Walter
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Re: How to adjust the contrast of LCD so that the characters are clearly read!
Patrick?
The contrast control (pot) is mounted on the Raduino facing towards the display. There is no brightness control (although you can add one)!
Mike ZL1AXG
Would anyone tell me how to adjust the contrast, not only the brightness, of the LCD, so that I can read the characters without tilting the whole chases or adjust my watching angle.? Thanks Patrick Ma?
|
How to adjust the contrast of LCD so that the characters are clearly read!
Would anyone tell me how to adjust the contrast, not only the brightness, of the LCD, so that I can read the characters without tilting the whole chases or adjust my watching angle.? Thanks Patrick Ma?
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Re: Common heatsink for IRD510's
#ubitx
The issue with not using the chokes is that now you are putting DC through the core in addition to the RF and adding to the saturation of the core from the DC component.? That’s why you can get away with smaller cores for the RF portion if you route the DC through the chokes instead. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? Moderator – North American QRO Yahoo Group. ? email:? bill@... ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Friday, March 23, 2018 2:22 PM
To: [email protected]
Subject: Re: [BITX20] Common heatsink for IRD510's #ubitx ? Not a problem.
Impedance from drain to ground is quite low, my guess is the push-pull output transformer gives it 12.5 ohms
because the center of the primary is effectively at ground.? (Some push pull amps power the finals through
a center-tap which is at AC ground, instead of using the extra chokes at L8, L9).
How much not a problem?
Check this out:??
Capacitances around the IRF510 gate do mean it requires more drive at 30mhz than
some of the other FET's.? But I've never heard of the drain-to-ground capacitances being
a problem.? Allison recommends extremely short source leads to a good ground plane,
and keeping the gate far far from the drain to avoid oscillations.?
She clips off the drain lead and solders any drain connections directly to the tab.
Jerry, KE7ER
On Fri, Mar 23, 2018 at 11:43 am, Al Duncan VE3RRD wrote: This may have been answered already. The mounting tab on the IRF510 is internally connected to the DRAIN which is the output of the transistor (connected to the output transformer). Therefore would it not be hot both with 12V and also with RF; and if mounted on a common heatsink, wouldn't they be capacitively coupled together through the insulating material? Would this be a problem on the higher bands, like 10m?
I guess the way to check would be to measure power out on 10m with individual heatsinks, and then with a common heatsink. The dielectric properties of different insulators (mica, silicone, ceramic etc) could also affect things.
73? AL
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On 24/03/18 10:26 AM, Mark Kesner wrote: This is my first attempt at a pcb enclosure.? Cost of the material was $12 on the auction site.? I learned a few things about measuring but am overall pleased with the result.? I will be adding slide on decals to label the controls and connections.? The paper has not come in yet.? ?I added a PTT switch and an Rf gain control (not yet implemented) on the front and a? micro USB port and audio filter switch for cw on the back.? I have a NESCAF cw filter that I will be putting in soon. Mark Your rig is up too! 73 Mike ZL1AXG -- Mike Woods mhwoods@...
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Mike
These pics are now visible in the gallery
M
On 24/03/18 3:58 AM, Mharpen@... wrote:
Hello Mike,
Here are some pictures of my uBITX build.
Thanks for looking.
Mike N6CMY
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Bruce
If you got an initial email from Paypal it "took".? They are
currently shipping orders from around 24-28 January based on
constructors declaring this on the BITX20 list here.?? You should
get another email when your kit has shipped (or you can check
status by logging in to Paypal.
73 Mike ZL1AXG
On 24/03/18 2:56 PM, BruceN wrote:
I ordered a uBitx
understanding that it would take some time before it shipped.
Is there any way to determine the status of the order?? I'm not
even sure that it
"took".
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I ordered a uBitx understanding that it would take some time before it shipped.
Is there any way to determine the status of the order?? I'm not even sure that it
"took".
|
Vince N2AIE
K9HZ
Vic WA4THR
Paul Galburt - K2AYZ