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Re: Yet another magnetic loop antenna
¿ªÔÆÌåÓýThese Stepper Drivers are used a lot for 3D printers.? I got spares, but never have blow one up. They are real inexpensive on eBay. The is a lot bigger problem driving a Vacuum Variable on the Loop Ant than a Capacitor. I am wondering how to come up with some "end stops" for turning the shaft.? They take about 18 or so turns end to end. In fact mine feels like is is coming apart at the end in one direction, gets loose feeling. And this stuff is near the RF field of the loop.?
You sure don't want a bunch of metal stuff there. Right now I just have to reach over and peak it for noise during receive since I have it near the BitX. I turn the volume up and peak it.? I am going to
put a piece of wood dowel on it temporarily. Maybe it is not a real problem since if it stays tuned it never goes near the ends. I am just worried about the stepper taking off and hitting the ends. I wish it had a clutch arrangement built into it, but it feel like it is coming apart when I get near one end. I have thought about a small belt to a 10 Turn pot,
then it could be like a Servo and be driven to a pot position? This is the first Vac Variable I have had in over
50 years of Hamming.? Its Cool! Mike, WA6ISP
On 10/3/2017 6:24 AM, Jack Purdum via
Groups.Io wrote:
-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@... |
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Re: W8TEE Software Release 1.07-09
Jack Purdum
In the Files section of the group home is the assembly manual. I posted this on Sept 30. Look for my call. Jack, W8TEE From: Rodger <rodger_hanson@...> To: [email protected] Sent: Tuesday, October 3, 2017 12:38 AM Subject: Re: [BITX20] W8TEE Software Release 1.07-09 Hello, where can I get the build document(s) for this display please?
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Re: W8TEE Software Release 1.07-10 to Remove digitalWriteFast library
Jack Purdum
Mike: This is a kludge, but try this (new lines in yellow): at line 1574 add: ?? static int passCounter = 0; add these lines between 1593-1594: ??? 1593????? if (encoderDirection) { ??????????????????? passCounter++;??????????????????????? // Got a speedbump ??????????????????? if (passCounter < 2) {????????????????// Double-speedbump yet? ??????????????????????? break;????????????????????????????????????// Nope... ??????????????????? } else { ??????????????????????? passCounter = 0;????????????????? // Yep... ??????????????????? } ??? 1594 ?????? if ((unsigned long) (fasttuneStart - fasttuneEnd) < DEFAULTTRIGGER) {??? // They're spinning fast... I can't test this right now, but give it a shot and see what happens. Jack, W8TEE From: Mike Bryce <prosolar@...> To: [email protected] Sent: Tuesday, October 3, 2017 12:47 AM Subject: Re: [BITX20] W8TEE Software Release 1.07-10 to Remove digitalWriteFast library Jack, put in a new encoder and no joy. I feel two 'clicks' and with every two clicks, the display moves on digit. 7.021.6 turn two clicks 7.021.5 push the switch button, and I can step though the menus, change keyer speed (it's jumpy, too) and back to freq display mike, wb8vge |
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Re: Yet another magnetic loop antenna
Vince Vielhaber
I found the Polulu to be the least dependable. This is the one I use - I
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bought the last ones from someone other than Banggood tho: Vince. I've used both the EasyDriver and this one from Polulu: --
Michigan VHF Corp. |
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Re: W8TEE pending software release and port(?)
#w8tee
Jack Purdum
I used to have a cabin in Canada and I mailed a package to myself in the States. Even the Canadians make fun of their postal service, saying that 90% of their relatively high postal rates is for storage. Still, after several weeks it had not shown up. It finally did show up, 9 months later! The envelop was covered in "floor oil", like you had slid it across the floor of a Jiffylube garage. I'm sure that when it was being sorted someone missed a bag and it slid across the floor and under a desk or something. Jack, W8TEE From: "paul@..." <paul@...> To: [email protected] Sent: Tuesday, October 3, 2017 5:18 AM Subject: Re: [BITX20] W8TEE pending software release and port(?) #w8tee I inquired at two post offices and at the second discovered that the package had arrived there about 1.5 hrs before I got there! I couldn't pick it up as it had already been sorted for delivery. I should get it later today if this info is correct. If so, that would be 38 days since it left Mumbai. I would love to know where it passed though along the way but USPS doesn't seem keen to reveal that information for some reason.? Paul KG6QGE |
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Re: Yet another magnetic loop antenna
Jack Purdum
I've used both the EasyDriver and this one from Polulu: I found the Polulu to be a more robust driver. Jack, W8TEE From: "paul@..." <paul@...> To: [email protected] Sent: Tuesday, October 3, 2017 5:40 AM Subject: Re: [BITX20] Yet another magnetic loop antenna Excellent write up. I've recently finished building an air variable cap and the next project is integrating the stepper and building a controller.? Could you use relays to control your driver micro stepping with the Arduino? Also, you might want to look at the Sparkfun EasyDriver. It has logic pins broken out that can set the stepping from full to 1/8 and also an enable/disable pin. I also have a Chinese EasyDriver clone which was a fraction of the price of the original but I haven't tested either yet.? Regards, Paul KG6QGE |
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Re: uBITX - A reboot of the old BITX
Vince Vielhaber
I thought I saw the values somewhere but can't find them now. Take note,
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however, C243 has a different value on the schematic than in the construction notes. Vince. Has anyone figured out the values of C241 and C245? I can't read the value --
Michigan VHF Corp. |
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Re: Yet another magnetic loop antenna
John P
On Tue, Oct 3, 2017 at 02:40 am, <paul@...> wrote:
Could you use relays to control your driver micro stepping with the Arduino?Thanks for the comments! You could probably use relays, but they would have to operate really fast and operate a lot. I would suspect they would fail after a while. There's also the potential problem of contact bounce. The EasyDriver looks like a great?one for? a loop tuner. I wish the one I'm using had the ability to program the step size on the fly. That would make it possible to do large moves of the capacitor?faster, then one could reduce the step size for fine tuning. I'll be interested in hearing about your project.?Feel free to email at my callsign at?ARRL.org. ? -- John - WA2FZW |
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Re: Yet another magnetic loop antenna
Excellent write up. I've recently finished building an air variable cap and the next project is integrating the stepper and building a controller.?
Could you use relays to control your driver micro stepping with the Arduino? Also, you might want to look at the Sparkfun EasyDriver. It has logic pins broken out that can set the stepping from full to 1/8 and also an enable/disable pin. I also have a Chinese EasyDriver clone which was a fraction of the price of the original but I haven't tested either yet.? Regards, Paul KG6QGE |
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Re: W8TEE pending software release and port(?)
#w8tee
I inquired at two post offices and at the second discovered that the package had arrived there about 1.5 hrs before I got there! I couldn't pick it up as it had already been sorted for delivery. I should get it later today if this info is correct. If so, that would be 38 days since it left Mumbai. I would love to know where it passed though along the way but USPS doesn't seem keen to reveal that information for some reason.?
Paul KG6QGE |
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Re: preview: Raduino v1.25 with capacitive touch CW keyer
Yes this function is included too.
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73 Allard PE1NWL On Tue, October 3, 2017 03:38, Al Duncan VE3RRD wrote:
Maybe a straight key functionality could be added, so touching either |
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Re: Multiband bitX40 questions
Has this code , a facility for usser defined crystal filter frequrency? and suitable for dual conversion too> regards Sarma ? On Tue, Oct 3, 2017 at 4:47 AM, vk3xl via Groups.Io <vk3xl@...> wrote: In another thread I got the following response. |
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Re: W8TEE Software Release 1.07-10 to Remove digitalWriteFast library
Mike Bryce
Jack,
put in a new encoder and no joy. I feel two 'clicks' and with every two clicks, the display moves on digit. 7.021.6 turn two clicks 7.021.5 push the switch button, and I can step though the menus, change keyer speed (it's jumpy, too) and back to freq display mike, wb8vge |
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Re: W8TEE Software Release 1.07-10 to Remove digitalWriteFast library
Jack Purdum
That worries me, as I'm using the cheap KY-040 encoder myself but it performs flawlessly for me. Anyone else having issues? Jack, W8TEE From: Mike Bryce <prosolar@...> To: [email protected] Sent: Monday, October 2, 2017 10:45 PM Subject: Re: [BITX20] W8TEE Software Release 1.07-10 to Remove digitalWriteFast library It¡¯s one of those cheap encoders off eBay. It simply won¡¯t tune correctly. It¡¯s like the digits change only with 2 or 3 clicks. Or jumps from 7.012 to 7.290 with a few clicks I¡¯ve installed the .01 caps If I push the switch, I can step through the various menus and select what I need.? I¡¯ve got some other encoders, haven¡¯t tried them yet. I¡¯m suspecting it¡¯s a fubar encoder
Mike, WB8VGE
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Re: W8TEE Software Release 1.07-10 to Remove digitalWriteFast library
Mike Bryce
¿ªÔÆÌåÓýIt¡¯s one of those cheap encoders off eBay.It simply won¡¯t tune correctly. It¡¯s like the digits change only with 2 or 3 clicks. Or jumps from 7.012 to 7.290 with a few clicks I¡¯ve installed the .01 caps If I push the switch, I can step through the various menus and select what I need.? I¡¯ve got some other encoders, haven¡¯t tried them yet. I¡¯m suspecting it¡¯s a fubar encoder
Mike, WB8VGE
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Arthur Bryant
Allard PE1NWL
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