Very cool, only active up to 23cm for the time being, but looking to at least get a transvertor for 13cm this summer !! Thanks for sharing the video........73
When I was a kid in MI back in the 1960's I would listen to CHU for hours on my shortwave. I was a country kid living between a corn field and a wheat field with a pig pen across the road from the driveway. CHU (and all of SW) was a reminder that there was a whole different world out there somewhere beyond those fields and that pig pen, a world with technology, transistors, paved roads, remote controls, air conditioning, and magic. BTW, CHU sounds almost exactly as I remember it from 60 years ago, (I'm certain they haven't changed the English voice recording,) although I think they added the French announcement. When you're in your mid 70's some things fade.
They indeed have kept the same English announcement. When he was young, a good friend of mine used to sleep his entire nights with WWV or CHU in the background!
Я работал на 1296мгц и там бывают прохождения. И я удивился когда принял сигнал маяка 189км, когда нет никакой прямой видимости. Все говорили что связи не будет, а она была.
@@VE2ZAZ merci, dommage que vous n'ayez pas accès à QO100, peu être un jour on se rencontrera sur l'air, j'attends de recevoir le résultat de l'examen de radioamateur pour faire ma demande d'indicatif
Use one of the Mini-Circuits double balanced mixers. Available in many forms and specs. The ADF4351 synthesizer is a good local oscillator. But nothing is simple, so not for beginners.
@@VE2ZAZ I have make my own it's working !!!!! and yes i use ADF4351 ,thanks you. you can check my project i have make one video about it on my channel
I had one that got +6dbm output but 4 that were much less. I think its the losses in the pipe cap filters. Still its a good transverter board for the price.
I made 5 of these W1GHZ 10ghz transverter boards and none of them output the specified output power. I think from memory the best one had about +6dbm and the others less.. I see from your video that yours didn't achieve 10 mw either. I really like your video style. Clear and informative.
Gr8 job! Looks that microwaves are the area that some DIY is mandatory. HF, VHF, UHF is available now by quite cheap TRXes so there is no impuls to build DIY staff... But even DIY TRX for HF and then do QSO by that - give me more pleasure than use ready to use device. Just started play with microwaves too this year and it's a lot of experiments and learning on front of me. I think the worst is avability or/and price of measurement devices for such high frequencies. Greetings from Poland /SP6JAP/
That distance is not a function of frequency. The focal point position is a function of dish geometry. Simple measurements of the dish and parabola calculations will yield the exact the focal point distance from the bottom of the dish. Here is one calculator: www.calctown.com/calculators/parabolic-dish-antenna
Interesting subject. Last time I get Kuhne 10GHz transverter but up to now I had no chance to do any QSO... Not so many crazy people are around. Here in Europe I have access to QO 100 satellite (2.4Ghz uplink, 10GHz downlink) so I decided to build upconverter by myself starting microwave journey.. very interesting. I think we need more satellites to make microwave activities more popular.
There are already 22 videos on this project! And there are at least three more to come. See the playlist: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cHVOxPAIHcA.html
C'est manifique! Beaucoup de choses réunies en une seule entité. Ce gain sur l'antenne parabolique m'a fait rire comme un enfant devant votre réussite !
Awesome series , I'm as new to this as anyone can be and still trying to understand not just know and the details you focused on definitely helped. Oh and the use of scrap is just the way to go :) merci
awesome! what coupling cap did you use at the input exactly? also why no coupling cap on the output? it is DC coupled and can influence the bias of the second stage. and how did you measure the input VSWR? thanks
5 pf or so. Not critical since it does not take much capacitance to offer a low impedance path at 10GHz. The transverter has an input coupling cap, so no need for an output cap on the LNA. Howver, I did later add a coupling cap on the output as well, so I could add an external attenuator for testing purpose. I tested the VSWR with a generator and directional coupler, same technique as with the WR-90 to SMA transition.
The BW of the loop filter and also combination of integer and fractional ratios also have a big impact on phase noise. you may want to look into those as well
all chinese made synthesizer boards use the same regulator for AVdd and DVdd just by adding a simple filter. Consequently the layout is also poor and couples the digital to analog path. even some of their cheap bench top signal gens use the same design which is very wrong. DVdd and AVdd must use separate regulators and the layout for DGND and AGND (even though they are electrically connected) must be carefully separated to minimize coupling. of course all of that adds to the cost. AVdd also needs a lot better filtering of course.
Absolutely. Now here in my application I am quite sure it is going to be fine. If this becomes an issue, I will consider redesigning, following Analog Devices recommendations. Thanks!
You'll hear the US time signal station WWV from Ft. Collins, CO on 2.5/5/10/15/20 MHz. Most times of the day you will be able to hear the transmission on at least one of those frequencies.
Aurait-il été envisageable d'installer un dispositif d'accord rondelle/boulon à l’arrière du guide d'onde pour obtenir un réglage plus pratique ? 73's de FO4MM tahiti
Oui, bien sûr. Un bouchon de cuivre avec friction métallique pourrait bien fonctionner aussi. Par contre, la partie du guide d'onde à l'arrière de la sonde a été coupé assez court pour raison d'espacement dans le compartiment de la parabolique. Cela ne laisse pas beaucoup d'espace pour y coulisser une paroi. Merci!
