Date   
SSNA

glenn percy
 

I took a look at the design of the SSNA and was wondering if the 2N5109 could be replaced with a suitable MMIC device, as an alternative footprint on the PCB?.

 

Perhaps in the USA, parts are easy to find, but the 2N5109 is virtually unobtanium here.

 

Similar with some of the resistor values used in the pads. Many of the axial  resistor values are not available here in VK. We only have 2 "hobby" type electronic stores here where you can buy basic components. Alternatives like Mouser, Digikey etc have very high shipping costs to us and also minimum purchase order costs.

 

Glenn

vk3pe

.

Re: AD-8307 Power Meter

Jerry Haigwood
 

If you want to build the original meter circuit, you should be aware that the Radio Shack 1 mA meter is no longer available.  However, you can get a 1 mA meter labeled 0-15V and also 0-3V from allelectronics.com for $3.50 CAT# PM-376.   A box can be purchased from Radio Shack for $3.50.  The meter can be built “ugly style” on a piece of copper clad board.  See my meter in the overview of the Simple SNA on the PHSNA yahoo group web site.

Jerry W5JH

"building something without experimenting is just solder practice"

 

From: PHSNA@... [mailto:PHSNA@...] On Behalf Of n5ib@...
Sent: Wednesday, September 18, 2013 4:38 PM
To: PHSNA@...
Subject: [PHSNA] AD-8307 Power Meter

 

 

Looking at the poll results it seems there will be a fair number of folks who will need to build an rf power meter to go with their SSNA. I think Analog Devices is still willing to send out a sample AD-8307 if asked.

Remember that the article in June 2001 QST by Wes (W7ZOI) and Bob (W7PUA) sets out all the needed information to built one.

I invite those of you who already have built or bought one to share with us how you built it or whom you bought from. Post photos or other info if you wish.

It is NOT my intention to offer a circuit board or a kit for the power meter, since that design is someone else's intellectual property.

Jim, N5IB

Re: Printed Circuit Boards for SSNA

glenn percy
 

 4Z4ME's photos on this group show a version using a keypad and display. While the PHSNA is a nice cheap simple project, it's usefullness for tuning a filter is limited by the need to use a PC and Xcel to plot the response each time. Do the authors of this project expect to expand the capabilities of the PHSNA in the future, to something like that of 4ZME's version?  If so, does the new PCB have this capability (conenctors etc) in the design?

 

There is an in between possibilty also maybe, that the PHSNA has a display but no keypad, the sweep rates etc being downloaded from a PC initially. In many cases this would be OK as the item to be measured is already known in terms of frequency etc.

 

Glenn

 

 

 


--- In PHSNA@..., <phsna@...> wrote:

 I've made a trial order to ITEAD Studio for some small SMT boards for another project.. This is a test of their procedures and quality, as well as the scheme of translating ExpressPCB to gerber files.


Probably be about two weeks or so before I have a verdict. Then I will ask for a hard count of number of boards requested, and I can set a price point. At this point it looks line we'll certainly be under $10 including the CONUS postage. Could be well under if this board house works out. So think about if you want more than one board, since it's not likely I'll do a second run.


I'd encourage DX ops, if you wish, to organize some sort of group drop-ship if there are several folks in an area. It will probably reduce costs. If anyone wants to volunteer to be a drop ship target, please let me know.


Jim, N5IB





--- In phsna@..., <w5jh@...> wrote:

Well actually, you have plenty of time to order a PCB.  Jim has not yet placed an order because he is trying to get a reasonable count as to how many people want boards.  If you look on yahoo, there is a poll asking for you input on PCBs.  I think he plans to place the order within a week or two.  You can work out a group buy with Jim.

Jerry W5JH

"building something without experimenting is just solder practice"

 

From: PHSNA@... [mailto:PHSNA@...] On Behalf Of Garry
Sent: Tuesday, September 17, 2013 5:42 PM
To: PHSNA@...
Subject: [PHSNA] Re: Printed Circuit Boards for SSNA

 

 


Is it still possible to order a PCB? Also, in a number of other groups where these group buys are held, if there is a "critical mass" to one region (such as Australia) then some kind sole may offer to take all boards and on ship locally. This often helps reduce the cost to ship from the US.

Regards
Garry VK3XYX

Re: Printed Circuit Boards for SSNA

Jerry Haigwood
 

Glenn,

    The current version of the Simple SNA also has a generator function built into it.  You can use the generator function and a scope to tune an LC filter.  The use of the Arduino will not allow sweeps to be made in real time.  You would need to redesign the unit using a different, faster processor and probably switch to assembly language.  Right now, I do not know of any plans to change processors, displays, input device, etc.  However, the this is an open system and anyone can take a try at it.

Jerry W5JH

"building something without experimenting is just solder practice"

 

From: PHSNA@... [mailto:PHSNA@...] On Behalf Of vk3pe@...
Sent: Wednesday, September 18, 2013 5:59 PM
To: PHSNA@...
Subject: [PHSNA] RE: RE: Printed Circuit Boards for SSNA

 

 

 4Z4ME's photos on this group show a version using a keypad and display. While the PHSNA is a nice cheap simple project, it's usefullness for tuning a filter is limited by the need to use a PC and Xcel to plot the response each time. Do the authors of this project expect to expand the capabilities of the PHSNA in the future, to something like that of 4ZME's version?  If so, does the new PCB have this capability (conenctors etc) in the design?

 

There is an in between possibilty also maybe, that the PHSNA has a display but no keypad, the sweep rates etc being downloaded from a PC initially. In many cases this would be OK as the item to be measured is already known in terms of frequency etc.

 

Glenn

 

 

 



--- In PHSNA@..., <phsna@...> wrote:

 I've made a trial order to ITEAD Studio for some small SMT boards for another project.. This is a test of their procedures and quality, as well as the scheme of translating ExpressPCB to gerber files.

 

Probably be about two weeks or so before I have a verdict. Then I will ask for a hard count of number of boards requested, and I can set a price point. At this point it looks line we'll certainly be under $10 including the CONUS postage. Could be well under if this board house works out. So think about if you want more than one board, since it's not likely I'll do a second run.

 

I'd encourage DX ops, if you wish, to organize some sort of group drop-ship if there are several folks in an area. It will probably reduce costs. If anyone wants to volunteer to be a drop ship target, please let me know.

 

Jim, N5IB

 

 

 


--- In phsna@..., <w5jh@...> wrote:

Well actually, you have plenty of time to order a PCB.  Jim has not yet placed an order because he is trying to get a reasonable count as to how many people want boards.  If you look on yahoo, there is a poll asking for you input on PCBs.  I think he plans to place the order within a week or two.  You can work out a group buy with Jim.

Jerry W5JH

"building something without experimenting is just solder practice"

 

From: PHSNA@... [mailto:PHSNA@...] On Behalf Of Garry
Sent: Tuesday, September 17, 2013 5:42 PM
To: PHSNA@...
Subject: [PHSNA] Re: Printed Circuit Boards for SSNA

 

 


Is it still possible to order a PCB? Also, in a number of other groups where these group buys are held, if there is a "critical mass" to one region (such as Australia) then some kind sole may offer to take all boards and on ship locally. This often helps reduce the cost to ship from the US.

Regards
Garry VK3XYX

Re: Ordered the stuff ...

Jerry Haigwood
 

Nick,

    Was there some reason you didn’t like the Funduino? ;-)

Jerry W5JH

"building something without experimenting is just solder practice"

 

From: PHSNA@... [mailto:PHSNA@...] On Behalf Of kennnick@...
Sent: Wednesday, September 18, 2013 9:27 PM
To: PHSNA@...
Subject: [PHSNA] Ordered the stuff ...

 

 

I got on eBay last night and today and ordered an AD9850 board (about $6 ppd) and a Freeduino (about $12.50 ppd).  I compared pictures on the Excel BOM to those on eBay. 

 

So maybe they'll arrive on the slow boat before the boards are ready.  I'm hoping I have the stuff to populate the board already.

 

I have something similar already working with a PIC and Raspberry Pi, but this will be a lot neater.

 

Ready to make some measurements.

 

73-

 

Nick, WA5BDU

 

Re: Ordered the stuff ...

Nick Kennedy
 

Haha ... I can't keep all these variants straight.  I had to go back and make sure I did order the Funduino.  I got this one


I got the AD9850 from Chipworld, one of the recommended vendors.


I do have a "real" Arduino Decimilla that my son gave me for my birthday five years ago.  I've used it to run an Si570, implement a barometer / altimeter (SOTA?), a compass / magnetic heading sensor, etc. The Arduino is a fun little doo-dad.



73-

Nick, WA5BDU


Jerry said-

Nick,

Was there some reason you didn’t like the Funduino? ;-)

Jerry W5JH

Re: AD-8307 Power Meter

Nick Kennedy
 

I posted a couple pictures of my log power meter in the Photos section under my call (WA5BDU).  I built it manhattan style.  


I had a meter movement fetish for a few years and picked every nice one  I saw cheap at hamfests.  So I had this giant 1 mA movement available.  I used someone's shareware software to make a scale.  I wish I'd accented the intermediate '5' tick mark, since it's hard to count them by eye. Despite the size of the meter, I'm often reading it with a magnifying glass.  But I'm generally using the voltage output anyway, the meter is mostly for ballpark.


I put a voltage divider on the output to the banana jacks so I would have 5.00 VDC at +17 dBm, to keep from over-ranging the ADC input to the PIC I currently plug into the thing.


Also shown is the 40 dB tap from the original article.  It's just lying there, for show - not mounted in the box.


My push-together sheet metal box is perhaps a little wimpy when it comes to shielding, but it's much better than nothing.


73-


Nick, WA5BDU 


 

From: PHSNA@... [mailto:PHSNA@...] On Behalf Of n5ib@...
Sent: Wednesday, September 18, 2013 4:38 PM
To: PHSNA@...
Subject: [PHSNA] AD-8307 Power Meter

 

 I invite those of you who already have built or bought one to share with us how you built it or whom you bought from. Post photos or other info if you wish.


Jim, N5IB

Re: AD-8307 Power Meter

N5IB
 

Speaking of shielded boxes... Jerry cited a radio shack box for the SSNA in the B.O.M. It was the same one he used for his power meter, I think.

And I'll add this link to some steel slip-top tins - rather like Altoids, but available in bigger sizes. Bright steel finish that takes paint well, and easy to punch or drill. The overlapping lid makes for good shielding. And the metal can be soldered to.

<http://www.papermart.com/rectangular-tin-cans/id=20952#20952>

Look on page 7 of the overview. That's my 8307 power meter in the "medium" tin. I bought a case of 24 of them for the price of two cast aluminum boxes. I've used mine for several projects.

Jim, N5IB


Arduino UNO digital I/O

N5IB
 

I've been puzzling over how to configure the SSNA so at least it doesn't **prevent** the addition of a display. Better Arduino heads than mine may be needed for advice and counsel here.

I'm going under the presumption that the UNO has 14 digital I/O lines available. The DDS interface uses 4 (D8 - D11 at this time, but that can change).

Most LCD displays (parallel interface) need 8 data lines, an enable, a read/write line, and a clock. That adds up to 15. That may preclude the addition of a parallel display on the UNO. Of course a (more costly)  serial LCD would solve that problem. And the serial TX and RX lines are not used by the SSNA.

Jim, N5IB

Re: Arduino UNO digital I/O

glenn percy
 

 

--- In PHSNA@..., <phsna@...> wrote:

Re: Arduino UNO digital I/O

glenn percy
 

 

Re: Arduino UNO digital I/O

glenn percy
 

 

Arduino SSNA display

glenn percy
 

Re: Arduino UNO digital I/O

Nick Kennedy
 

Not sure what replies you have have already had since the Yahoo interface is acting a bit weird as to showing other messages in the thread.


I usually use the 4-bit version of the LCD interface.  Then an E and and RS line are needed.  You can tie the R/W line to "write only" usually.  So six lines are needed.


I've also been known to multiplex or share lines for multiple purposes.  If a line on the LCD is an input and the LCD will ignore it except when it gets a command to readthe data lines, you can use it for other purposes in the same project.


73, 


Nick, WA5BDU


Re: Arduino UNO digital I/O

N5IB
 

Thanks, Nick,

There certainly are 6 lines available. bits 0 and 1 are used up when the serial interface (even just the USB) is enabled. But the rest of the low 8 buts is uncommitted. So you send the data as a pair of nybbles?

Could you perhaps post a bit of info to help me and others. Suggest a display model that works in that mode (would need to be operable in a graphic mode) and if d2 - d7 would be appropriate to use.  If you have a circuit sketched that would be great. My only experience with LCDs has been ready-to-go kits, and programming the RS-232 interfaced ones.

Jerry did point out that the A/D lines can be used as digital. But the concern is introducing switching noise when reading adjacent pins as analog.

Jim, N5IB

Re: Arduino SSNA display

N5IB
 

Hi Glenn,

For some reason the body of you messages was blank. Looks like Yahoo is partially FUBAR.

If you want, send to <n5ib@...> direct

Re: Arduino UNO digital I/O

Nick Kennedy
 

Oops, well I'm talking beyond my knowledge level here.  I was thinking of the standard LCD Hitachi interface.  I guess we'd be thinking TFT or something for the graphical screen.  Not sure what the standards are there for I/O.


I took a quick look at Adafruit and I see one that requires 14 (!) lines, but another that uses SPI says it just needs 4 or 5 digital pins to send data to the display.


Regarding multiplexing pins, I'm looking at my PIC log power board and I see that I have one pin that's used for data out to the LCD and for UART transmit, while another has three uses:  data to LCD, UART receive, and DDS clock.


73-


Nick, WA5BDU

Need MMIC

Jerry Haigwood
 

Hello All,

     I have a need for a couple of Mini-Circuits MMICs specifically the ERA-3.  If you have a couple of these that you can spare, Please contact me with price and shipping cost.

Jerry W5JH

"building something without experimenting is just solder practice"

 

Re: Count me in!

Larry Przyborowski
 

Me too. Please count me in for a pcb.

Tnx in advance.

73, Larry

Re: Arduino SSNA display

William R Maxwell
 

I do hope we manage to find a way to keep the option of on-board display and keyboard alive, as I think that would really make the project something special. Sorry if this sounds a little like a VK conspiracy but most of we VKs now appearing on this group have a long association and history of co-operation on other projects. We now probably tend to all think alike :)

Bill, VK7MX

On 20/09/2013 11:59 AM, vk3pe@... wrote:
 
JIm, you might like to look at this project (kit) which sells for about $100 all up with display for inspiration. It can be bought with PC interface only for half that or add the seperate display driven serially.  Or, a bluetooth pcb that displays on an Android phone. Schematics are available on the page also.
 
I hope this gets through, i seem to have trouble replying to posts