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Re: Homebrew spectral analyzer
Looks great! Not using the modules allows much more layout flexibility. Did you find a 30MHz TCXO? Looking forward to hearing how it performs. Nice you have an oven for soldering, that attenuator was
By m0wid · #1887 ·
Re: Homebrew spectral analyzer
Fortunately, all materials arrived before the New Year, and I successfully completed the welding work today
By blackberryer · #1886 ·
Re: SimpleSA component selection
Hi I was looking at the parameter calculation of this LPF recently, and I found the results of your initial design parameters.(https://rf-tools.com/lc-filter/) However, as mentioned above, the
By blackberryer · #1885 ·
Re: Homebrew spectral analyzer
I think that because there is a DC isolation capacitor inside the module, the external capacitor can be omitted
By blackberryer · #1884 ·
Re: Homebrew spectral analyzer
You can see also i have made some modifications because no standard values of capacitors and inductances? and add a solder jumper on the DNF of the filter
By Gerard · #1883 ·
Re: Homebrew spectral analyzer
Hello M0wid, you wrote:???At some point very early on I has a problem with a mixer that did not work properly unless DC isolated, so I added dc isolating caps on all mixer ports. *So need to add
By Gerard · #1882 ·
Re: Homebrew spectral analyzer
Well,I see. It seems that C40 cannot be used to replace the additional DC isolation capacitor you mentioned, because there are 3db components in the middle, and the DC component may cause abnormal
By blackberryer · #1881 ·
Re: Homebrew spectral analyzer
Hi. A response to various posts in multiple threads, which might confuse! The RF switch must not have a DC path on any of its ports, hence the need for the additional capacitor.? At some point very
By m0wid · #1880 ·
Re: Homebrew spectral analyzer
I hope to see your results as soon as possible. It is worth mentioning that when I measured some other modules in WIFI, I found that the current peak value was only 200~400mA. Therefore, I do not plan
By blackberryer · #1879 ·
Re: Homebrew spectral analyzer
Hello Blackberryer You may be right. Would that make a duplicate capacitor with C40? Wait for the response of the creator of the project before modification (and / or deletion. I had included it) cdt
By Gerard · #1878 ·
Re: Homebrew spectral analyzer
Be aware that there is a mistake in my schematic, which I really must fix.? The RF switch U9 needs to have a capacitor between the output RF2 on pin 3 and R36.? I used 100nF but its is not at all
By blackberryer · #1877 ·
Re: SimpleSA component selection
JLC recommends 0.3424mm (7826-CPWG) with accurate line width. I have added some important network labels for easy identification to the schematic diagram, as well as 50R text label, as shown below. I
By blackberryer · #1876 ·
Re: SimpleSA component selection
Hello Blackberryer, If you are in China, you will have no problem getting your components, because for me, everything comes from China regardless of the reseller. Can you tell me which part of the
By Gerard · #1875 ·
Re: SimpleSA component selection
Another problem is TinySA. It seems that the output of GPIO2 is connected to the output of RF switch and connected to HF-INOUT. I guess that it connects the_ OUT and HF_ INOUT shares a SMA interface.
By blackberryer · #1874 ·
Re: SimpleSA component selection
Thank you for your answer. In fact, I first noticed SimpleSA when I found your article. Looking at the dialogue in the article, it seems that you are almost finished? In addition, I understand that
By blackberryer · #1873 ·
Re: SimpleSA component selection
TinySA and the latest TinySA Ultra are not open source. Like you, I like to make things and learn something on the way. In fact, complete replication has no fun and no useful knowledge. Indeed, as you
By blackberryer · #1872 ·
Re: SimpleSA component selection
All very good observations. First of all the credit for the original design goes to Erik Kaashoek.? He developed it much further and much more polished than this project, producing the TinySA and
By m0wid · #1871 ·
Re: SimpleSA component selection
Hello, For the components, I found it on E...Y, except the transistor, capacitor and resistor. (Ali....s) I switched everything in 1206 (Easier to weld) except the inductors that can only be found in
By Gerard · #1870 ·
SimpleSA component selection
Recently, I saw the open source design of SimpleSA, and I thought it was great.Thank you very much for such an excellent design, which benefits most people. I wanted to make one at home, but after
By blackberryer · #1869 ·
Re: What does Reference Generator Out do #tinysa
/g/HBTE/files/WA2FZW%20-%20M0WID%20ESP32%20-%20ILI9341%20Version%20of%20the%20TinySA/Tiny%20SA%20Operator%27s%20Manual%20%28V2.8%29.pdf
By blackberryer · #1868 ·