Re: Standoffs for mounting the board
Chart shows two rows of thread designations on the left. One row is for NF (National Fine) and the other is for NC (National Coarse). Each screw size has one entry in each column. To the right is a column of standard drill sizes. Drill bits come in large kits that have three overlapping size designations. One set is fractional sizes such as 1/8¡±, or 17/64¡± etc. Another set is in Letters A-Z, and the third is numbered. This chart is using the numbered series.
A search will turn up more detailed charts that indicate proper size hole for clearance (pass the screw through the hole) as well as proper size for tapping and that take into consideration the type of material being tapped. Tapping hole for steel is usually larger than for aluminum to allow deeper threads for strength.
All of this is educational but moot, as this is all an SAE or English size chart. You need the same thing for Metric sizes.
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Thanks for all of the input guys! ?Luckily, I have access to a machine shop where I work. ?
So I am a complete noob when it comes to all this, so the linked chart on tap sizes is greek to me. ?I am not sure how to determine if the tap set I have access to will be appropriate for M3 standoffs. ?Would one of you guys be kind enough to take ?peek and let me know or help me learn how to decipher the chart that was linked here?<IMG_20170609_120249.jpg>
Much appreciated.
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Re: Standoffs for mounting the board
Thanks for all of the input guys! ?Luckily, I have access to a machine shop where I work. ? So I am a complete noob when it comes to all this, so the linked chart on tap sizes is greek to me. ?I am not sure how to determine if the tap set I have access to will be appropriate for M3 standoffs. ?Would one of you guys be kind enough to take ?peek and let me know or help me learn how to decipher the chart that was linked here?  Much appreciated.
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TFT/VFO Code and PCB Update
All:
Attached is an updated assembly manual for the TFT/VFO PCB I talked about at FDIM. Read the manual completely before building the board. I am also attaching the code for the TFT display and the VFO. There are two code files and there are directions for setting up those files for the Arduino IDE in the manual. Hopefully, the code is fairly easy to read. Some things I'm happy about; others I'm not. First, even without calibrating the AD9850, the frequency error is only 0.0000087% at 7MHz. After calibration (as explained in the manual), I cannot measure the error...if there is one. It looks dead-nuts on to me. Second, the keyer is simple, but works. I haven't told how to add the CW message switches yet, but most of you know how to do that. (I will be adding it to the manual, but wanted to get this out there ASAP.) Also, you can add paddles from your keyer and use the rig as a code practice oscillator right now. Dennis is finishing up the CW (and other) mods so I will have to change the code what that gets finished. And that's what I'm not happy about: The AGC, S meter, speech compressor, and CW mode is not implemented yet. You'll have that as soon as we get it done.
Note, the code is NOT a replacement for the work done by Allard. My PCB uses the Arduino MEGA 2560 Pro Mini and the Ad9850 (Type II) board which is vastly different that the Raduino board shipped with the standard BITX40.
I have more PCB's now and can begin shipping those. If you wanted multiple boards, but only got one before, please reorder. On foreign orders, I tried sending two orders as First Class mail in an envelop to get the costs down. One came back; hopefully the other one made it through. But, I'm not going to take the chance. All boards will go Parcel Post from now on. If you are in a foreign country, 4 boards go for the price of 1, so combine orders if you have a friend who wants one. Sorry guys, but foreign orders are $15, period. The additional postage averages about $11 and I have to fill out the export forms, which is a pain in the butt. Trust me, I'm not getting rich on you guys. US orders are still $7.50. Please note:
1. My paypal account is: ? econjack@... ? ? ? ? ? ? ? ?(please don't use any other account)
2. When you pay, there is a place where you can add a note: please write your shipping address in that note.
If you find bugs in the software, let me know as soon as possible and I'll try to correct them as fast as I can.
Jack, W8TEE
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Re: Standoffs for mounting the board
On the use of cutting fluids-? different metals require different cutting fluids.? I use tapmagic brand (USA),? the no#1 tapmatic(yellow) is for ALL ferrous metals. The no#2 tapmatic (red) is for alluminium. It works great for brass and copper as well.....
Work slowly, reversing the direction of turning to release the chips and DON'T TILT the tap...
Your local machine shop may spare you a bit in your own container.
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Re: Yet another Raduino PCB
Sending Photos did not work?
Do it this way.
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This is yet another Raduino PCB designed to add some features.
1) I wanted to be able to plug Nano in and wanted the USB connect next to the side of the cabinet so I can program without
taking the lid off.? I will make a small hole.
2) Added more filtering and conditioning on the power input.
3) Added a dedicated connector for Rotary Encoder.
4) Added an I2C connector.
5) I wanted proper Level Shifting to the Si 3V part.? Added FETs and pullups for that.
6) Added D0 and D1 pins on PCB.
7) Kept power and VFO connector on 5P header so no changes to my present wiring was necessary.
8) Put contrast Pot where you can get to it.
I think I added photos to this post correctly?
Take a look if you are interested.
Mike, WA6ISP
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Re: Amp readings on Bitx40
Hmm. ?Where did I (or somebody) say 35-40ma?
It's possible I did. ?(That's about right for my KD1JV MTR transceiver.)
But if so I would have been wrong.
Jerry
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On Sat, Jun 10, 2017 at 09:18 am, KM4TRT wrote:
You have mentioned something quite lower ( 35-40 ma).
?
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Jerry and all, I've read all the answers that you sent me and others about the power usage for setup. My question is: Farans instruction (part 8 second bullet) say::
- "Switch on the transceiver. There should be a soft hiss from the speaker. The transceiver should draw 150-140 mA in receive mode."
This is approximately my current draw at receive. ?You have mentioned something quite lower ( 35-40 ma). ?What am I missing.
Thanks, Andy
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Re: UBitx LSB to USB change
In addition to a function switch, probably want to also remove C91 and C92 as mentioned in Allard's operating instructions.
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On Sat, Jun 10, 2017 at 08:33 am, Jerry Gaffke wrote:
Allard's sketch flips between LSB and USB by moving the VFO from low side (5mhz) to high side (19mhz) of the 12mhz intermediate frequency. ?That seems to work fine and is the easiest to implement (just update the code on your Nano and add a Function button). ?There are at least three ways to flip between LSB and USB operation.
?
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Re: add yourself to the new BITX operators map
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Re: add yourself to the new BITX operators map
I noticed that to enter my data, my Firefox didn't work, but Chrome worked very well. So if you are having problems entering yourself on the map, try Chrome.
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Re: add yourself to the new BITX operators map
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Re: UBitx LSB to USB change
There are at least three ways to flip between LSB and USB operation. Could drive the BFO from CLK0 of the Si5351 as mentioned here by Allard (but not yet implemented in his sketch): ? /g/BITX20/message/27021This gives several advantages: Calibration can be more accurate, BFO can be easily placed properly with respect to the IF filter passband, and provides a way to implement various diagnostic aids. Could add capacitance at C103 to move the current analog BFO ?to the other sideband. Allard's sketch flips between LSB and USB by moving the VFO from low side (5mhz) to high side (19mhz) of the 12mhz intermediate frequency. ?That seems to work fine and is the easiest to implement (just update the code on your Nano and add a Function button). ?In this case the BFO frequency does not move, the sideband inversion occurs because we are now subtracting the RF signal from the VFO, not adding the RF signal to the VFO, when creating the IF signal. Jerry, KE7ER
On Sat, Jun 10, 2017 at 07:44 am, JuanCarlos Berberena Gonzalez wrote:
Hi Colleagues, the best for all.
Farham a question for you.
What is the best option to change the side band from LSB to USB and vice versa if I want to use my rig in PSK or other mode I need.
I understand it can do for itself do when you change the band, but I want to do for myself if I need it.
I am working with the Raduino using the 3 output in Rx with the ANGARA and the performance is ok
I have changed the side band changing one of each oscillator and no problem with it, but I consider the VFO configuration is not the best one.
?
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Thanks Raj. You reminded me that I also used to do the same. I also used to wire a small lamp with a 4.5V battery (flat battery pack with 3 cells. who remembers them) and used to read the morse from the lamp. Regards Lawrence
On Thu, Jun 8, 2017 at 4:55 AM, Raj vu2zap <rajendrakumargg@...> wrote: Good advice from everyone!
When I was learning, while driving I used to read boards in my mind in morse "did dah dah" sounds!
As Dan said practice till you hear all the birds and squirrels in morse!
Raj
At 07-06-2017, you wrote:
>Hey Terry,
>
>
>Keep it up Terry and PRACTICE,PRACTICE, practice, practice, .......
>
>73
>Dan
>HK4DEI
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Re: add yourself to the new BITX operators map
Great idea! I'm added.
KK6RPX
On 6/9/2017 1:53 PM, Doug W wrote:
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Seeing the topics
for regional operator lists got me thinking.? If words are good,
pictures are better.? I set up a google map that you can add
yourself too to help visualize where everyone is located.? I was
going to add people that responded to the other topics but out of
respect for privacy (and my laziness) this should be entirely opt
in only.? The map is only accessible with the link below.? The
interface is reasonably intuitive but I will do my best to explain
how to add yourself.
go to type your address in the search bar on the top of the map (the
box with the magnifying glass to the right)
hit enter or click the magnifying glass
verify the location displayed
click add to map at the bottom of the box that pops up
now click the pencil/edit icon at the bottom right of the box
change the highlighted address to your call sign and click save at
the bottom left of the box
you can also add more information to your spot if you choose to
bookmark the link and check back as more people add themselves
I am making this sound much more complicated than it is.? If
anyone can describe the process better please do.
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Hi Colleagues, the best for all.
Farham a question for you.
What is the best option to change the side band from LSB to USB and vice versa if I want to use my rig in PSK or other mode I need.
I understand it can do for itself do when you change the band, but I want to do for myself if I need it.
I am working with the Raduino using the 3 output in Rx with the ANGARA and the performance is ok
I have changed the side band changing one of each oscillator and no problem with it, but I consider the VFO configuration is not the best one.
Qrv's 73's Jc
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Re: Regarding the future of BITX... (off with his head)
Don't forget that the Teensy also has internal audio processing which makes an ideal candidate to drive the bitx for digital modes as well or even custom audio filtering. I might just replace the nano with a teensy 3.6.
greetz
Leo
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Re: add yourself to the new BITX operators map
Jim, Switch to topic view and make things easier on yourself /g/BITX20/topicsthe map is at Sat, Jun 10, 2017 at 07:18 am, Jim Schliestett wrote:
Would someone please provide the link to the map again. Thanks
?
?
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JuanCarlos Berberena Gonzalez