Re: uBitX - Replacement microphone
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Re: Dirt cheap uBitx case
#ubitx
That is a serial or parallel distribution switch.
It takes a serial port output (6 to 20 wires),
or a parallel port (usually 20 wires) and
transfers it to 4 different receiving ports.
The most common use was to connect one
computer to several different printers.
They were quite common in computers before
the advent of USB and (lately) wifi.
Finding one nowadays at a decent price is a
rarity. A few years back, they were very common
and very cheap. They make excellent radio cases
though one usually has to redo the front and back
parts. I have several with double-sided pcb added
as faceplates. In addition to the cases, one usually
ends up with a 12P4T switch (which is fine for switching
filter banks), and lots of #28 wire.
john
AD5YE.
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Re: Raduino oscilators. 33mhz and 57mhz " . Documentation says one thing, but this is what I measured.
The hex file works. But, its not in the raduino I measured. The raduino was programmed by Ashhar in India.
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Re: Modifying Bitx40 BPF band pass filter
Quick update: I tried John's suggestion and changed R29 in 47 ohms. There were no voice stations but the CW stations became much more audible so it was a clear improvement. Still the audio level was very low. It seemed the 3rd amp behind the mixer was not amplifying enough. According to my cheap Chinese component tester C29 (coupling to the BPF) was unknown or defective. So I replace it with a new capacitor and presto: huge audio signal !!! It is past midnight over here so the band has gone quiet, so I will have to do some more fine tuning tomorrow. I intend to replace R29 with a 50 ohm trimpot so I can adjust the signal at the exact right level.
Thank you all! Now I can focus on the BPF.?
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Re: uBitX - Replacement microphone
Look for an old sound card. Early ones had threaded ones much like their 1/4"/6mm brothers, later ones all-plastic board-mounted.
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Howdy Raj,
Well over half a century ago when I was 13, I wanted to build an oscillator to practice morse code.? One of the men at my church was an EE and also a ham (he also had a really cute daughter my age that I was kind of sweet on...).? I dropped by his house one evening and asked him if he could help me build an osculator (not a misspelling, rather a mispronunciation of oscillator).? He told me if I wanted to practice code, he would help me build an oscillator but if I had in mind some sort of practice with Janice (his daughter) I had better take up some other hobby quickly.
Nelson??
On Tue, Mar 6, 2018 at 7:37 PM, Raj vu2zap <rajendrakumargg@...> wrote: My English teacher Mr. Hobday RIP would have explained it as oscillating occulation!
He lived down the road and would drop in some evenings and explain English words
by breaking them down. I suspect he always came for a cuppa! I managed to pass!
Raj
At 07-03-18, you wrote:
>How far away from English does Ameriglish/Yankish really go?
>Their/There/They're is bad enough, but "osculation"??? Sorry, David, go back to middle school :( or at least use a dictionary once in a while ...
>
>Still, 73
>Dex, ZL2DEX
-- I always thought the Universe was a wonderfully strange place until I?studied Particle Physics - I now know the Universe is, in fact, profoundly odd in nature
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Re: Raduino oscilators. 33mhz and 57mhz " . Documentation says one thing, but this is what I measured.
Hopeffuly you see this Jerry, its just for you. but anyone might find this usefull I hope.?
Frequencies on 10mhz lsb Clock 0 54.98977
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? clock 1 32.99388
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? clock 2 11.99624
Frequencies on 10 MHz USB Clock 0 54.99647
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? Clock 1 56.99305
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Clock 2 11.99624?
And as I said in the video, haven't measured the master 25.000 MHz clock. Soon that will happen.?
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It went from shipping Monday to being Stateside today! WOW! DHL does not mess around! If this was UPS or USPS, it would still be in Europe! It will be next
week or the week after before I get started on it. I may order another as I figure what features I want to add. Look forward to building something. It has been 40+ years sense my last Heathkit!
?
ACJ
73
KW4SZ
Corbett
?
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From: [email protected] [mailto:[email protected]]
On Behalf Of Fred Buecker
Sent: Monday, March 05, 2018 8:05 PM
To: [email protected]
Subject: Re: [BITX20] ubitx order
?
I'm going to order mine next month, has it shipped yet?
?
On Mar 5, 2018 7:07 PM, "James Tate" <kw4sz@...> wrote:
Exactly 60 days! Mine shipped today! Another 3 to 4 weeks and I can get started on it! LOL!
?
J
73
KW4SZ
Corbett
?
?
From:
[email protected] [mailto:[email protected]]
On Behalf Of Jason Schlager
Sent: Monday, March 05, 2018 3:10 PM
To: [email protected]
Subject: Re: [BITX20] ubitx order
?
My uBitx took about 60 days from order to delivered by DHL to USA.?
--
Jason Schlager
KM6AUS
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Re: uBitX - Replacement microphone
Problem is the mikes have a 2.5 and 3.5mm jack. I ordered some 2.5mm females, but didn't pay attention and I received the SMD type. The barrel from that is even shorter than the 3.5mm ones that came with the kit.
Have been browsing but so far haven't found a solution yet.
Unfortunate the Baofengs are not that cheap to harvest parts off it. ;)
John
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Re: RD16HHF1 power curve flattening...some
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David
It seems that there is a communication problem with uBITX that communication error occurred in both reading and writing.
If you have another computer, would you try it again there?
The top setting is 38400, None, 8, One.
Can you test one more?
uBITX Firmware CEC Version is compatible with most software.?
If you have a CAT control program that you are using, please Communication test with it
You can also use programs such as Ham Radio Deluxe, FLDIGI, Wsjt-x, and JT-65HF.
Please refer to the blog below for CAT program setting.
Ian KD8CEC
Thanks for the reply.? I'm using 1.04 and indeed the error occurs when reading.
error message
error receive length = 1/1027
73,
David
K0PD
-- Best 73 KD8CEC / Ph.D ian lee kd8cec@...
(my blog)
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Re: uBitX - Replacement microphone
You could mount the jacks from the kit into 2mm thick sheet of plastic.?
--
Jason Schlager
KM6AUS
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Re: Raduino oscilators. 33mhz and 57mhz " . Documentation says one thing, but this is what I measured.
Correction:
File name is ubitx_20.ino
? and
You can manually choose the wrong sideband (ie, choose USB for digital modes on 40m).
But it will jump to the "correct" sideband whenever you tune through 10mhz.
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On Wed, Mar 7, 2018 at 04:36 pm, Jerry Gaffke wrote:
Bands below 10mhz are traditionally LSB.? Bands above are USB.
At line 420 inside Farhan's original ubitx_20.iso we have this scrap of code:
? ? if (prev_freq < 10000000l && frequency > 10000000l)
? ? ? isUSB = true;
? ? if (prev_freq > 10000000l && frequency < 10000000l)
? ? ? isUSB = false;
So anytime you tune across 10mhz, the second local oscillator clk1
will flip to the other side of the 45mhz 1'st IF.
As it should.
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Re: Dirt cheap uBitx case
#ubitx
That switch selector is hilarious. Imagine wiring that up to the uB. We¡¯re gonna need more Arduino pins for that bad boy lol?
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On Mar 7, 2018, at 7:09 PM, KB1JPW < a.fairaizl@...> wrote: I wish I could remember which post covered using switch boxes for cases but this one was perfect and only $4 from an electronic surplus store. My radio literally just arrived this afternoon so I quickly ran out to find a "case." I will add a plate on the back to cover the former cutouts for centronics connectors. The original center switch hole is where the display naturally sits when plugged directly into the board. I will end up popping the front plate onto the mill to get a clean and square hole. This case is steel so I might end up going for something down the road that's lighter. For the price along with a massive selector switch, wire, and a decent set of knurled machine screws, I cannot complain. I bought a larger case for $6 when I need to start looking at upgrades.?  
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Re: Raduino oscilators. 33mhz and 57mhz " . Documentation says one thing, but this is what I measured.
Use the source, Luke! Bands below 10mhz are traditionally LSB.? Bands above are USB. At line 420 inside Farhan's original ubitx_20.iso we have this scrap of code:
? ? if (prev_freq < 10000000l && frequency > 10000000l)
? ? ? isUSB = true;
? ? if (prev_freq > 10000000l && frequency < 10000000l)
? ? ? isUSB = false;
So anytime you tune across 10mhz, the second local oscillator clk1
will flip to the other side of the 45mhz 1'st IF.
As it should.
No idea what that hex file is.
If you have suspicions, I suggest you compile from source
using what's in Farhan's github account for the uBitx:
? ??https://github.com/afarhan/ubitx
And I am still obstinately not following any links to videos.
Jerry, KE7ER
On Wed, Mar 7, 2018 at 03:34 pm, Michael Shreeve wrote:
And not sure why, but I cannot find the original message posted. It had a link to this video? So I'm posting the links to both of my Si5351 uBITX measurement video.? Direct measurement Clocks 0, 1, 2? ?
Why are they reversed ? ...? Shows how the clock frequency changes as you drop from above 10 to below 10 using the original software. Measures it.?
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Re: RD16HHF1 to replace 510's in Micro BITX
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Is this a linear or logarithmic pot.? I think probably linear but I need to get the right replacement.? Having trouble getting a knob to fit want to go with the knurled shaft instead
--
73, W9KJO
Walter
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Re: RD16HHF1 power curve flattening...some
You are doing what I would¡ ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? Moderator ¨C North American QRO Yahoo Group. ? email:? bill@... ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Nik VK4PLN
Sent: Wednesday, March 7, 2018 6:17 PM
To: [email protected]
Subject: Re: [BITX20] RD16HHF1 power curve flattening...some ? Hi Group.
Anymore updates on this? I have received my components and plan to do the following:
RD16, BN43-3312 (4:1) with 330pf mica, 820ohm feedback, 330pf on R87/88, Re-bias 250-500ma?, 13.8v and play with RV1....
Thoughts?
73 VK4PLN
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Re: RD16HHF1 power curve flattening...some
Hi Group.
Anymore updates on this? I have received my components and plan to do the following:
RD16, BN43-3312 (4:1) with 330pf mica, 820ohm feedback, 330pf on R87/88, Re-bias 250-500ma?, 13.8v and play with RV1....
Thoughts?
73 VK4PLN
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I wish I could remember which post covered using switch boxes for cases but this one was perfect and only $4 from an electronic surplus store. My radio literally just arrived this afternoon so I quickly ran out to find a "case." I will add a plate on the back to cover the former cutouts for centronics connectors. The original center switch hole is where the display naturally sits when plugged directly into the board. I will end up popping the front plate onto the mill to get a clean and square hole. This case is steel so I might end up going for something down the road that's lighter. For the price along with a massive selector switch, wire, and a decent set of knurled machine screws, I cannot complain. I bought a larger case for $6 when I need to start looking at upgrades.?  
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Jason Schlager
Michael Shreeve
Nick VK4PP
K9HZ
N1AFF - formerly KB1JPW