Oscilloscope testing beginers guide
I have reciently purchased a Usb picoscope ...
In order to check and align things up I find hard to know the points and expecting measuremnts that I should get.?
Anyone with experience out there?
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Hidehiko-san,
The frequency as shown on the display is always the TX carrier frequency.
In CW mode, the RX frequency is shifted by 800 Hz, not the TX frequency.
73, Allard PE1NWL
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On Wed, June 14, 2017 11:58, qrper72@... wrote: Hi all,
Does anyone try to QRV the CW mode by Raduino_v1.14.1 for BITX40?
Does it really works?
Here in my situation. The TX frequency does not down 800Hz when I select
LSB mode.
Any suggestions welcome.
ja9mat hidehiko.
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CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Hi all,
Does anyone try to QRV the CW mode by Raduino_v1.14.1 for BITX40?
Does it really works?
Here in my situation. The TX frequency does not down 800Hz when I select LSB mode.
Any suggestions welcome.
ja9mat hidehiko.
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Re: BITX QSO Night, Sunday, June 18, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
I have been listening to 7.277 a bit while sweating in the shack. So an anytime BITX40 calling frequency must be a good idea. Now, does anyone have a youtube for dummies video they especially like about qrp spots, and dx summit? I haven't focused my energy that way yet. I guess nows the time.
I heard Mexican activity last night on 7.210. It would have been no problem to work with it I had a regular radio. to be rude and talk over them with.
Do the extras want to have a frequency just for them? it's okay if thay do.
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Re: WANTED VK3YE LED LDR AGC diagram
thank you Phil.
now that makes more sense to me. i can follow that.?
back to a bit of playing at lunchtime with the old soldering gun.
thanks ill post a photo or two once its done.
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Re: BITX QSO Night, Sunday, June 18, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
On Mon, Jun 12, 2017 at 07:24 pm, Al Duncan VE3RRD wrote:
How about using QRPspots? ? to advertise frequencies in use by BITXers?
QRPspots doesn't get very busy so it is easy to see a BITX spot if we put "bitx40" or "bitx40 group" in the comments.
This is also a good idea but it does not need to be limited to Sunday night at 7pm.? Anytime that band conditions seem good would be a good time to post at and . Post in this messageboard as well to see if anyone else is interested.?
Another strategy is to agree on a certain frequency to call CQ, this allows people to monitor a frequency to see if anyone from the group is calling.? At one time, 7285 was designated as a QRP frequency, but I hear a net there (not QRP) quite often. 7277 seems to be in an area that is somewhat unused with low noise if we are lucky.
I would like to see a QRP night and a new QRP frequency but I am reluctant to mix general QRP stations with the BITX group.? We already have a lot of participants in the BITX40 QSO Night in eastern North America and if it gets busier, we will need to go to a net format with a net control operator.? Of course everyone is welcome to participate, but I am not going out and advertising the event to other QRP operators.
Our event is really just an informal gathering on the radio waves.? It is surprising how popular it has become.? This has taught me how effective event organizing can be.? There were a few scheduled nights, and then I thought I should write up an event description based on how I thought it would work best for low power QSOs.? The entire organization of our event is that I copy/paste a text file in this messageboard it with a new date every week.? I try to ask for comments on how to improve things so we can keep learning how to work a QRP net.? Now there are a lot of participants and it is impressive how many people join in and keep the contacts going, sort of a self-organizing net.? All we need is good propagation and we can ragchew just like the kilowatters.
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Just for fun I registered?? ?It just redirects to the Google maps page. ?The other link still works and always will I just figured everyone was tired of the long url.?
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Re: Standoffs for mounting the board
here's a YouTube to review ? ? ? 73 WA9DOH
On Fri, Jun 9, 2017 at 9:37 PM, John Smith via Groups.Io <johnlinux77@...> wrote: I used plastic standoffs with a flat foot, and some double sided foam mounting tape to mount it in a holiday tin. Like the stuff on the back of a breadboard. Here is a link to what I have, and the feet are half inch. I got some bigger ones but the post was too big for the BITX holes.
This next one is the ones that are too big.
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QSO night next 7178 & 7277
I agree that Spanish speaking stations operating on 7175 would suggest that we go up a bit.
7178 is better, going higher gets interference from group operating on 7181.
A couple of weeks ago, I had a high power station tuning up on top of us. I cranked up the power
a little and cleared the frequency alerting other stations that QRP is being used on frequency.
Willy heard me and I guess the guy tuning up did too. I know that a lot of us don't have the power
to fight back the QRM. I can go from 5 to 1000 watts. If we need to clear the frequency
we will. I'm in Iowa maybe an East Coast station could do the same.
Ed
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Re: Standoffs for mounting the board
By bolts, do you mean screws from the bottom up through the enclosure and into the standoffs?
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Re: someone just deleted the entire BITX operators map - almost fixed
Yes, the address search bar comes up now. TKS
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Re: Standoffs for mounting the board
I recommend you to assemble the standoffs with loctite 242.
I think the best option is to use the bolts instead of tapping the ?enclosure?
72!!
El 13 jun. 2017 3:55 PM, < davidzdeb@...> escribi¨®: Excellent! They have a M3 0.5 tap!
Is 0.5 a standard thread spacing?? I see a lot of M3 standoff kits on amazon, and none seem to specify thread spacing.
Also, ?would taping the enclosure be preferable to simply drilling a whole and using a standoff secured with a screw or nut?? I would like something that I can toss in a back pack over and over again without worrying about the standoffs coming loose.
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Hi Ken:
Yes, it would be under the OS License Agreements. As I said before, my goal is to get as many of you messing around with microcontrollers and the associated code as I can, and this board brings out a bunch of I/O pins that you can easily play with. With 54 I/O pins and 256K of memory, some of you are going to come up with some really neat stuff that we hope you'll share with us.
Jack, W8TEE
From: Ken KM4NFQ <km4nfq@...>
To: [email protected]
Sent: Tuesday, June 13, 2017 4:05 PM
Subject: Re: [BITX20] W8TEE VFO Board
Greetings Dr. Purdum,
Don't just release your idea and trust that everyone will adhere
to the Open Source model. Release it under an Open Source license.
A license gives you and others specific rights.
You may be interested in this Open Source Hardware FAQ: Personally, I am not a big fan of a light gray font on a white background. It is very difficult for me to read.
I had to copy paste the content of the wed page into a text editor to read it. In any case, no matter what kind of license you put on the design, you will have to defend the license in a court of law to make it valid. Very few individuals have the resources to defend every infraction of a license. A few electronics designers/distributors release their designs as Open Source Hardware and Software; Adafruit and SparkFun are a couple. Both of them seem to be thriving? The worst-case scenario is that the Chinese will produce the board for less than what you are asking for it, and offer free shipping to boot. I think you have a great idea, and I wish you All The Best. Ken, KM4NFQ
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Re: someone just deleted the entire BITX operators map - almost fixed
On Tue, Jun 13, 2017 at 01:37 pm, Al Duncan VE3RRD wrote:
Has the map now been locked? Looks like no one can add their location at this time.
?Try it again.? I was right in the middle of trying something.? It should work fine now.
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Re: someone just deleted the entire BITX operators map - almost fixed
Has the map now been locked? Looks like no one can add their location at this time.
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Re: WANTED VK3YE LED LDR AGC diagram
Try this, may help. tracks run left to right, breaks are where the blue dashed lines are. Did try photographing the tracks, but it does not help.
Pot for S meter, depends on the meter.
Phil - G7BZD
On Tue, Jun 13, 2017 at 8:22 PM, philip yates <phil@...> wrote: Have a photo, it is laid out left to right as per the diagram, other side of the vero board is a mess, as its being used for the umpteenth time, but can describe whats there.Wire connections Green, Orange(wiper) Blue 10K pot for AGC, red above is +12v, black below is +12v, top red is audio in, thats the wire connected to the resistor. preset with red and black is the feed across the LED to the S meter, and yellow/red is audio out. Breaks on rear of pcb are under all electrolytics, resistors flat on pcb and the diode. and between the transistor stages. I have tried to photograph the rear but is a mess, I strip build following the circuit left to right, hoping to get some pads shortly and do a manhatten style build.
Hope it helps.
Phil - G7BZD
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Greetings Dr. Purdum,
Don't just release your idea and trust that everyone will adhere
to the Open Source model. Release it under an Open Source license.
A license gives you and others specific rights.
You may be interested in this Open Source Hardware FAQ: Personally, I am not a big fan of a light gray font on a white background. It is very difficult for me to read.
I had to copy paste the content of the wed page into a text editor to read it. In any case, no matter what kind of license you put on the design, you will have to defend the license in a court of law to make it valid. Very few individuals have the resources to defend every infraction of a license. A few electronics designers/distributors release their designs as Open Source Hardware and Software; Adafruit and SparkFun are a couple. Both of them seem to be thriving? The worst-case scenario is that the Chinese will produce the board for less than what you are asking for it, and offer free shipping to boot. I think you have a great idea, and I wish you All The Best. Ken, KM4NFQ
On Tue, Jun 13, 2017 at 11:59 AM, Jack Purdum via Groups.Io <econjack@...> wrote: I had the same thought. I am in the process of redoing the board because K2ZIA did the initial layout of the board, but he's so busy right now he doesn't have time to mess with it. When the new board is done, I'll post the Gerber files on the group site. I do hope anyone who uses those files does so in the spirit of Open Source.
Jack, W8TEE
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Re: Standoffs for mounting the board
M3 x 0.5, M3 being the thread and 0.5 being the pitch of the thread.
Phil - G7BZD
On Tue, Jun 13, 2017 at 7:55 PM, <davidzdeb@...> wrote: Excellent! They have a M3 0.5 tap!
Is 0.5 a standard thread spacing?? I see a lot of M3 standoff kits on amazon, and none seem to specify thread spacing.
Also, ?would taping the enclosure be preferable to simply drilling a whole and using a standoff secured with a screw or nut?? I would like something that I can toss in a back pack over and over again without worrying about the standoffs coming loose.
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Re: WANTED VK3YE LED LDR AGC diagram
Have a photo, it is laid out left to right as per the diagram, other side of the vero board is a mess, as its being used for the umpteenth time, but can describe whats there. Wire connections Green, Orange(wiper) Blue 10K pot for AGC, red above is +12v, black below is +12v, top red is audio in, thats the wire connected to the resistor. preset with red and black is the feed across the LED to the S meter, and yellow/red is audio out. Breaks on rear of pcb are under all electrolytics, resistors flat on pcb and the diode. and between the transistor stages. I have tried to photograph the rear but is a mess, I strip build following the circuit left to right, hoping to get some pads shortly and do a manhatten style build.
Hope it helps.
Phil - G7BZD
On Mon, Jun 12, 2017 at 10:52 PM, M0LHT <m0lht.huw@...> wrote: so my son took a screen shot of the video for me so i can print off and read
now to find these parts on the board. and work out how to attach them to the new board.?
i like the idea of an adjustable pot for the agc. can you show me a picture of your board Phill so i can see what both sides of the board look like.
?
Huw
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Re: Standoffs for mounting the board
Excellent! They have a M3 0.5 tap!
Is 0.5 a standard thread spacing? ?I see a lot of M3 standoff kits on amazon, and none seem to specify thread spacing.
Also, ?would taping the enclosure be preferable to simply drilling a whole and using a standoff secured with a screw or nut? ?I would like something that I can toss in a back pack over and over again without worrying about the standoffs coming loose.
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Allard PE1NWL
Hidehiko Komachi - JA9MAT
ekelley
Fede
