Date   
Re: RFI sources finding

John Bucsek
 

You would want an antenna tuned for the frequency you want to examine.  Basically its the same process as transmitter hunting.  Typically a yagi is a good choice for VHF and above.  
Do a little research on Transmitter hunting if you need to get up to speed on the process.
I would think that using some variety of an SDR receiver along with software that lets you see the waterfall for an extended period (up to hours in some cases) would be an easier way to figure out what is causing the noise and then use the Antuino to find the actual source.
HDSDR is a good program for this application as you can change the waterfall duration to monitor the frequency span all day.  Seeing when a noise source appears and disappears can give one a good idea what the noise source is.

Re: Antuino use to place an FM - DAB roof antenna? - Gerber file available?

Ashhar Farhan
 

Geert,
Antuino is a great sniffer. you can use it, of course! The PCB layouts are unfortunately not publicly available. However, the layout is quite simple. just take care around the outputs of the Si5351. keep those leads very short between the various resistor pads and the RF connectors.

73, f

On Tue, Dec 10, 2019 at 4:20 AM <Geert.VandeWiele@...> wrote:
Can Antuino also be used to find the best possible location and orientation for an FM - DAB+ roof antenna (VHF band II and band III)?
If so, how? The idea is that my hifi tuner is down on the ground floor, could i just connect the Antuino to the antenna while i'm on the roof installing the antenna, tune it to a specific frequency and see which orientation gives me the best possible signal?
Or is this all overkill and are there simpler ways to achieve the goal of finding the best spot/direction for the antenna?

Also, is the gerber file available for the PCB since this looks like a nice project to build with my kid that loves electronics?
Or is the PCB not open source and is buying the ready made Antuino the only optiion?

Thanks for any answers.

Tip: Better Antuino powering

Martin Kratoska
 

I replaced the battery holder for 6x AA cells with
a holder for 2x 18650 Li-Ion cells and using two 3.7V/9900 mAh units. The Antuino holds for long hours, actually I never get the batteries discharged. The use of 2x 18650 is also significantly cheaper compared to 6x non-rechargeable 1.5 cells. Another good side effect is that the internal 78L05 regulator does produce much less heat...

73,
Martin, OK1RR

RFI sources finding

Martin Kratoska
 

I plan to use my Antuino for RFI sources finding. My QTH is very noisy, full of LEDs with dimmers, switching PS etc. like another mid-city location. What will be the appropriate sensing antenna, do I need any additional attenuation/amplification etc.? Any experience?

73,
Martin, OK1RR

Antuino use to place an FM - DAB roof antenna? - Gerber file available?

Geert.VandeWiele@...
 

Can Antuino also be used to find the best possible location and orientation for an FM - DAB+ roof antenna (VHF band II and band III)?
If so, how? The idea is that my hifi tuner is down on the ground floor, could i just connect the Antuino to the antenna while i'm on the roof installing the antenna, tune it to a specific frequency and see which orientation gives me the best possible signal?
Or is this all overkill and are there simpler ways to achieve the goal of finding the best spot/direction for the antenna?

Also, is the gerber file available for the PCB since this looks like a nice project to build with my kid that loves electronics?
Or is the PCB not open source and is buying the ready made Antuino the only optiion?

Thanks for any answers.

Re: Initial startup challenge/solution

Christopher J. Shaker, KJ7BLE
 

Ashhar:

Thank you for designing and producing the Antuino for us.

The problem preventing my Antuino from running off the battery pack was due to bad solder joints around the DC power jack. I resoldered the joints, and now it is also working off the battery pack.

Chris Shaker

On 12/4/2019 10:42 PM, Ashhar Farhan wrote:
it is unfortunate that you are facing this problem. i have added testing of the battery case on the check list. 
very often the battery cases are packed badly as they arrive and we have to discard some away. thanks for the tip.

On Thu, Dec 5, 2019 at 3:47 AM Pat Cahill <w0bm@...> wrote:

                Good evening all,

                I recently received my Antuino.  I installed NEW batteries, but the unit did not power up.  I then plugged a powered USB cable into the Antuino and it cam up and worked perfectly.  I then started to investigate the battery problem, and found that the battery holder was not allowing one of the batteries to connect at both ends. The plastic battery holder was stiff.  If you looked closely, you could see one battery did not connect at both ends.  By repositioning the battery, the problem was solved.

 

This is not a complaint, rather hopefully a short cut if you are having problems after installing batteries.

Happy customer!

73,

Pat W0BM

Re: Initial startup challenge/solution

Dave_G0WBX
 

From: Ashhar Farhan
Date: Wed, 04 Dec 2019 22:42:45 PST

it is unfortunate that you are facing this problem. i have added testing of the battery case on the check list. 
very often the battery cases are packed badly as they arrive and we have to discard some away. thanks for the tip.

Hi.

I had the exact same problem at first.  I just poked each cell in turn to make sure they were pushed towards the +ve end, to make contact..

The "problem" seems to be, that the material the battery holder is made from, is unusually "thick/heavy" between the individual cell's, so gripping them so tight, that the spring contact at the -ve end, can't move them to make reliable contact at the +ve end.

Other multi-cell AA battery holders are available of course, but ...

73 to All.

Dave G8KBV
(Still learning my way around the firmware...)

-- 
Created on and sent from a Unix like PC running and using free and open source software:

Re: Initial startup challenge/solution

Ashhar Farhan
 

it is unfortunate that you are facing this problem. i have added testing of the battery case on the check list. 
very often the battery cases are packed badly as they arrive and we have to discard some away. thanks for the tip.

On Thu, Dec 5, 2019 at 3:47 AM Pat Cahill <w0bm@...> wrote:

                Good evening all,

                I recently received my Antuino.  I installed NEW batteries, but the unit did not power up.  I then plugged a powered USB cable into the Antuino and it cam up and worked perfectly.  I then started to investigate the battery problem, and found that the battery holder was not allowing one of the batteries to connect at both ends. The plastic battery holder was stiff.  If you looked closely, you could see one battery did not connect at both ends.  By repositioning the battery, the problem was solved.

 

This is not a complaint, rather hopefully a short cut if you are having problems after installing batteries.

Happy customer!

73,

Pat W0BM

Initial startup challenge/solution

Pat Cahill
 

                Good evening all,

                I recently received my Antuino.  I installed NEW batteries, but the unit did not power up.  I then plugged a powered USB cable into the Antuino and it cam up and worked perfectly.  I then started to investigate the battery problem, and found that the battery holder was not allowing one of the batteries to connect at both ends. The plastic battery holder was stiff.  If you looked closely, you could see one battery did not connect at both ends.  By repositioning the battery, the problem was solved.

 

This is not a complaint, rather hopefully a short cut if you are having problems after installing batteries.

Happy customer!

73,

Pat W0BM

Re: SWR Accuracy without mods

KN4SMO
 

Thanks Raj,

So no big deal for me at this point.  

Thanks so Much,  Scott

Re: SWR Accuracy without mods

 

Scott,

It does not affect the accuracy of the SWR reading. The SNA readings will be inaccurate at the high levels only!

Raj

At 21-11-19, you wrote:
Hi,

I have a Antuino that I have determined is -17 db with a coax running from the in to out. Does this issue affect the accuracy of every function ? And has someone posted photos of where R20 is and what part is needed for someone who has little electronic skills but wants to learn. This seems like a simple fix I can attempt.

Thanks Scott

SWR Accuracy without mods

KN4SMO
 

Hi,

I have a Antuino that I have determined is -17 db with a coax running from the in to out. Does this issue affect the accuracy of every function ? And has someone posted photos of where R20 is and what part is needed for someone who has little electronic skills but wants to learn.  This seems like a simple fix I can attempt.

Thanks Scott

Re: I bought an Antuino, but can't figure it out

radiodoc43
 

Either a video or a nice pdf with setup and examples would be great.


On Nov 18, 2019, at 2:23 PM, Jim Miller <stljim@...> wrote:


I bought one as well, I sure wish someone would create a YouTube video doing a deep dive into using it.  What's available is very limited and assumes as lot of existing knowledge.

Just my $0.02
--Jim


On Sat, Nov 16, 2019 at 3:32 PM <bstanaway@...> wrote:
Hello, 

I bought an Antuino, but I am not that tech savy and should have went with something a little easier to work.  I can't even figure out how to do a simple SWR measurement.  So My loss is your gain.  Asking $100 paypal and you pay the fees.  I'll cover shipping to you.

Thanks

Re: I bought an Antuino, but can't figure it out

Joshua Wood
 

I'm not sure if anyone was aware of this, but they did a good intro for it.  It's for the original firmware, but I doubt there were major changes to it's operation (still have to upgrade / swap parts on mine) to check.


-Josh
W0ODJ 

On Mon, Nov 18, 2019, 16:39 Joel Caulkins/N6ALT <caulktel@...> wrote:
I agree with Jim. I know how to check my SWR with the Antuino, but I would like a video or a manual that shows how to sweep a filter and some of the other things that it will do. I guess I just have enough imagination to figure it out.

Joel
N6ALT

Re: I bought an Antuino, but can't figure it out

 

I agree with Jim. I know how to check my SWR with the Antuino, but I would like a video or a manual that shows how to sweep a filter and some of the other things that it will do. I guess I just have enough imagination to figure it out.

Joel
N6ALT

Re: I bought an Antuino, but can't figure it out

Jim Miller
 

I bought one as well, I sure wish someone would create a YouTube video doing a deep dive into using it.  What's available is very limited and assumes as lot of existing knowledge.

Just my $0.02
--Jim


On Sat, Nov 16, 2019 at 3:32 PM <bstanaway@...> wrote:
Hello, 

I bought an Antuino, but I am not that tech savy and should have went with something a little easier to work.  I can't even figure out how to do a simple SWR measurement.  So My loss is your gain.  Asking $100 paypal and you pay the fees.  I'll cover shipping to you.

Thanks

Re: I bought an Antuino, but can't figure it out

bstanaway@...
 

That helps a little, but I already bought it's replacement.  So this has got to go.

Thanks!

Re: I bought an Antuino, but can't figure it out

Ted
 


It was a little "interesting" to get used to. First, dial in a frequency on the display. If your antenna is cut for 40 meters, input 6.5000 and pick a step range of a few MHz.  Go to the graph view and you will get a slope of SWR across the range chosen, starting at the freq chosen.  You can eventually get better resolution by choosing a frequency closer to the slope you see on this first run, choosing a narrower range, and picking a start frequency that's closer to that slope as well. A sharp blip becomes a bell.

I'm not in front of mine just now, so, please adjust for my terminology from memory.  

Best of luck,


Ted
K3RTA

I bought an Antuino, but can't figure it out

bstanaway@...
 

Hello, 

I bought an Antuino, but I am not that tech savy and should have went with something a little easier to work.  I can't even figure out how to do a simple SWR measurement.  So My loss is your gain.  Asking $100 paypal and you pay the fees.  I'll cover shipping to you.

Thanks

Re: SNA mods

zr6dx@...
 

On checking the SNA by shorting the output and input, I found my Antuino to give -16dBm.  I did the same as Joel  with two stacked 2K2 resistors and now it reads -19dBm.  Graph is perfectly aligned with the -20dBm line.

73
Noel
ZR6DX