Re: 3D Printed Case for tinySA
#tinysa
I may have incorrectly replied before (direct to Paul)...
Would this be what you are referring to:
Or is there something different you had in mind?? I can model this up (that link includes dimensions, which is very helpful to me), and see if I can make clearance for them.
My google search revealed a few other options but no dimensions for them.? The first link below looks longer than the others...
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Re: tinySA 4.3" or larger screen
In theory (I have not had time to try it yet), it can be upgraded to a 3.2¡± screen, in the same way as an iriginal Nanovna was upgraded (a year and a half ago, in the forum and on the nanovna wiki, I think).
You will have the same resolution but a 40% larger viewing area. No firmware should need changing although power consumption may be higher and a few more spurs may be displayed. It is a similar upgrade as the V2 vna was with the Hugen ¡°black and gold¡± v2 version.
However you have to get the appropriate 3.2¡± screen (I already have several) and need some desoldering and soldering skills, verging on on that required for smaller smd components ( to unsolder the flexible connector on the sa board and resolder the 3.2¡± screen back on. ?The 4.2¡± screen would need a firmware recompile and Eric is not minded to do this. The vnas were more open source so many people could do it and publish the modified firmware.?
Steve L
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The frequency stability of the tinySA is better than the resolution of the resolution filters. It is sufficient to calibrate the frequency once --
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For more info on the tinySA go to https://tinysa.org/wiki/
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Re: 3D Printed Case for tinySA
#tinysa
Thank you for doing this. It looks great. I will sure print one.
Chris
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Re: 3D Printed Case for tinySA
#tinysa
It¡¯s a nice solution. ?One small request, would it be possible to allow for SMA connector savers fitted to the TinySA? ? A couple of slots would do it. ?
73
Paul
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Re: 3D Printed Case for tinySA
#tinysa
Oops -? premature post! Materials used:
- V1 - Prusament PETG (Urban Gray)
- V2 - Prusament PETG (Galaxy Black)? - This is my favorite material and color
Approximate print times: Lower Case:? 9 hours Upper Case: 5.5 hours Obviously the images here have the logo printing, so this will be a one-off just for me.? I may paint in the recessed lettering and logo with white paint to make it stand out from the black material background.
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Re: 3D Printed Case for tinySA
#tinysa
OK - I am reasonably satisfied with this now.?? I will get something posted on Thingiverse (STL files) by end of day tomorrow for those who want to print their own.?? Details:
- Based on the comments above, I will omit the logos completely, including the text.? If I can add a separate file for the logo version if anyone wants it and the devs are OK with it.
- I doubt that it would work for the NanoVNA without some adjustments.? I don't have one so I can't create one.? The section where the tinySA nests into is specifically shaped for its housing .
- I had some 1mm thick rubber-like material and some 3.25mm thick foam (pretty stiff stuff) and placed them on the bottom and top cases as can be seen in the images.??
- I made some adjustments to ribs around the perimeter to improve fit with this second version
- I decided a good place for the guitar pick to reside is tucked under the attenuator support "bridge" in the left compartment near the bends of the 2 cables.? That bridge has some space below it that allows the cables to slide underneath, and the guitar pick seemed like a natural fit for that area
- To help manage the guitar pick lanyard, I added a couple of notches to the dividers to allow pass-through
- Added three ribs across the underside of the top to increase the stiffness of the top
- After assembly, I realized that the back rib interfered with the antenna connector, which needs to tilt upward to let it fit in its compartment.? I trimmed this away in the offending area with a utility knife.
- I will updated the model to fix the interference with the antenna connector before I post the files
- Added a bit more engagement in the latch features
- I found that by just sanding the features of the mating parts that slide past each other during engagement greatly improved the feel of the snap.? The layers of the print would rub together and it wasn't smooth (photos of the sanded surface are attached)
My printer is a Prusa i3 MK3S (with an MMU2S). Material used:
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tinySA 4.3" or larger screen
Looks like this is not? going to become a new product. Has anyone modified the tinySA for a larger screen? I'll mill my own cabinet.
Tnx,
Dale W4OP
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Here is my 3rd tinySA, same setup as before.
I'm quite amazed. Also a little puzzled as to why I can't get 1 Hz RBW on my 8560A as I have the feature.
Reg
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Here is the average of 100 sweeps with an 8560A at 10 Hz RBW for the default 10 MHz output from the tinySA.
I've been quite amazed at what I can do with a 3rd order Cauer. Fits the same footprint as a Butterworth if you parallel the devices before insertion.
I plan to design a suite of filters using Elsie for all the bands and common LO and IF frequencies which take into account the differing levels of the harmonics.
This is quite exceptional. Thank you!
Reg
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Re: New video: tinySA versus SIglent SSA3021X+
Ted,
This IS very impressive, what a wonder machine Erik has brought us lucky hams and experimenters.
Thanks very much, Erik and supporting folks.
John VE7KKQ
Erik, Your latest video on the comparison of a Siglent and Tiny SA is most interesting and informative. It is truly amazing that such a low cost instrument can perform as well, or exceed the performance of a much more expensive one. You might be interested in the following test:
Much of my work is in the Cable Television industry (75 ohm systems) with broadband data carriers, namely 256QAM, 6MHz wide. For field work the typical instrument is the Signal Level Meter which measures at a single voltage level point within? the data band and corrects for bandwidth etc. to arrive at the carrier level (in dBmV) for the broadband data signal. Obviously, The measurement point, automatically set by the meter programming, can have some total power error depending on carrier flatness, rolloff etc. The most accurate method to measure these carriers is using the channel power function on an SA as it accounts for the power over the occupied carrier band.. I did a quick comparison of three spectrum analyzers measuring channel power of? a broadband 495MHz data carrier on an HP 8593A; Rigol 815, and the Tiny SA using identical settings (except for slight RBW differences in the auto set up of the SA). As you can see from the attached document, the comparisons are very close, I suspect differing do to Channel Power algorithms used for the calculations.? It is even more amazing that, for the price of the TinySA, accuracy can be so close on more sophisticated measurements such as these. Also, on a -30dBm calibrated CW 100MHz carrier, the three instruments measured: HP 8593 E = -30.51 dBm; Rigol = -30.5 dBm, and Tiny SA = -30.4 dBm.?
As others have said: GREAT JOB!! Now all we need are some further improvements (i.e. larger screen, wider bandwidth etc.) to make this an even better instrument and value!
Ted (KD7AQO)
--------------------------------------- From: "Erik Kaashoek" To: [email protected]Cc: Sent: Saturday July 24 2021 5:28:27AM Subject: [tinysa] New video: tinySA versus SIglent SSA3021X+
A direct comparison of a tinySA and a Siglent SSA3021X+ while
measuring signal levels and harmonics.
Various aspects of level measurements are explained and
demonstrated------------------------------------------
For more info on the tinySA go to
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Re: New video: tinySA versus SIglent SSA3021X+
One quibble:
You should use a splitter rather than a tee. Your 50 ohm source is seeing a 25 ohm load.
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Re: New video: tinySA versus SIglent SSA3021X+
Great video!
I also got 2 more tinySAs from R&L today :-)
Now I have to make a bunch of output filters.
Have Fun!
Reg
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Re: New video: tinySA versus SIglent SSA3021X+
Erik, Your latest video on the comparison of a Siglent and Tiny SA is most interesting and informative. It is truly amazing that such a low cost instrument can perform as well, or exceed the performance of a much more expensive one. You might be interested in the following test:
Much of my work is in the Cable Television industry (75 ohm systems) with broadband data carriers, namely 256QAM, 6MHz wide. For field work the typical instrument is the Signal Level Meter which measures at a single voltage level point within? the data band and corrects for bandwidth etc. to arrive at the carrier level (in dBmV) for the broadband data signal. Obviously, The measurement point, automatically set by the meter programming, can have some total power error depending on carrier flatness, rolloff etc. The most accurate method to measure these carriers is using the channel power function on an SA as it accounts for the power over the occupied carrier band.. I did a quick comparison of three spectrum analyzers measuring channel power of? a broadband 495MHz data carrier on an HP 8593A; Rigol 815, and the Tiny SA using identical settings (except for slight RBW differences in the auto set up of the SA). As you can see from the attached document, the comparisons are very close, I suspect differing do to Channel Power algorithms used for the calculations.? It is even more amazing that, for the price of the TinySA, accuracy can be so close on more sophisticated measurements such as these. Also, on a -30dBm calibrated CW 100MHz carrier, the three instruments measured: HP 8593 E = -30.51 dBm; Rigol = -30.5 dBm, and Tiny SA = -30.4 dBm.?
As others have said: GREAT JOB!! Now all we need are some further improvements (i.e. larger screen, wider bandwidth etc.) to make this an even better instrument and value!
Ted (KD7AQO)
--------------------------------------- From: "Erik Kaashoek" To: [email protected]Cc: Sent: Saturday July 24 2021 5:28:27AM Subject: [tinysa] New video: tinySA versus SIglent SSA3021X+
A direct comparison of a tinySA and a Siglent SSA3021X+ while
measuring signal levels and harmonics.
Various aspects of level measurements are explained and
demonstrated------------------------------------------
For more info on the tinySA go to
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Re: 3D Printed Case for tinySA
#tinysa
Isn't 3-D printing plastic?
73,
Bill KU8H
bark less - wag more
toggle quoted message
Show quoted text
On 7/24/21 3:52 PM, Rebel Thompson wrote: Lettering looks real sharp, but sounds like a slippery slope. And without it the same case would be appropriate for the smaller 2.8" NanoVNA(s), including clones. I'd rather print my own generic labels than have a clone stored in a misidentified case. I'd buy a couple. BTW how long does it take to print?
Remember in "The Graduate", the future was in "plastics"? Today, I'd say 3D printing.
-30-
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Re: 3D Printed Case for tinySA
#tinysa
Lettering looks real sharp, but sounds like a slippery slope. And without it the same case would be appropriate for the smaller 2.8" NanoVNA(s), including clones. I'd rather print my own generic labels than have a clone stored in a misidentified case. I'd buy a couple. BTW how long does it take to print?
Remember in "The Graduate", the future was in "plastics"? Today, I'd say 3D printing.
-30-
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I am assembling a portable RF bench setup with a nanaoVNA and 3 tinySAs among other things. I would very much like to be able to use a GPSDO (e.g. RFzero) to synchronize all of them.
With sufficient flash space, a one second tick sent over USB would probably be "good enough" in consideration of the other limitations.
Please consider this.
Thanks,
Reg
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Re: 3D Printed Case for tinySA
#tinysa
I have made my adjustments and finished printing the lower half overnight.? Once the upper half is complete I will update with some new images and thoughts/conclusions.? If I am happy with this one, I will post it on Thingiverse sometime this weekend, but before I do so, I will wait until I get confirmation from the Devs about my question on the use of the logo on the lid.
Thanks!
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New video: tinySA versus SIglent SSA3021X+
A direct comparison of a tinySA and a Siglent SSA3021X+ while measuring signal levels and harmonics.
Various aspects of level measurements are explained and demonstrated
------------------------------------------
For more info on the tinySA go to https://tinysa.org/wiki/
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Re: 3D Printed Case for tinySA
#tinysa
Very nice!
If you were to sell one of these, I¡¯d buy one.
Thanks for sharing.
Hey all,
Just wanted to share a 3D printed case I designed around the tinySA.? It is still a work in progress, but I am attaching a few photos of the first print trial, as well as some screen grabs from my CAD.? The CAD shows some adjustments that I have already made (added tinySA logo on the top, and adjusted size of text, added some chamfers around the perimeter to soften the edges, etc).
Once I get something I am happy with I can share the STL files here and/or on Thingiverse.com.
The additional tweaks I intend to work on yet are:
- Refinement of the latch.? It works, but could be better/more robust
- I will likely remove the feature that holds the USB cable.? This was mostly an afterthought, and doesn't work well.? I will probably just wrap a velcro strap around the USB cable and toss it into that area.
- Add a notch in the divider near the top right corner of the tinySA to let the lanyard for the guitar pick pass more neatly into the space where the antenna and USB cable reside
I also wanted to ask the devs if they had any objection to including the tinySA logo on the case as pictured in the screen shot.? I wasn't sure if that would be problematic - I can remove it if I hear any objections or concerns.
Thanks!
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Chris Shaker, KJ7BLE
