Read the post upstairs.Suddenly I felt that these problems do not exist for me...Ha haI will introduce my experience to ham in China after the business trip in May.Let them show up more at qo100
Posts by BG0AUB
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It looks like you build scriber V2.0 do you have the right software V2.0 in use??
I was built with v1.0...Maybe e I'm not quite sure how it works.In addition.How do I change my BBS username to a call sign?Can you help me revise it?
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I made a SCRIBER -- Hellschreiber on a humble PIC
http://g8haj.uk/?Page_id = 288
But it didn't work.I don't know why...SCRIBER can send longer text and enable chat mode
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I have always believed that equipment debugging beyond GHz is a metaphysical art.Seemingly random stacks of solder joints and burrs are part of the tuning loop.But there must be a theory that can explain it. I just don't know.
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实践是检验真理的唯一标准
The copper looks like a capacitor, maybe showing more inductance...For lack of standard measuring equipment and more theoretical knowledge support, practice is the best method.I like that, maybe one day there will be an opportunity to have a measure or a theoretical analysis of the results.You will say.Oh, I see.
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Hi Achim,
thanks for the hint. SDR-Console supports an USB-Relay meanwhile, so switching the supply is simple but not very elegant. The LimeSDR Mini gives approx. 0 dBm, the total current to the amp. is about 2 Amps.
At present, I use all the equipment in a portable way, the dissipation is limited. But for longer standby a switch off of the idle current is useful. The picture shows the "Radio" below the laptop.Beautiful design.Does the limesdr mini work properly on the usb hub?
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Hi OMs,
because nearly every day a couple of emails arrive here about the modification of the small Andrew MRF21045 amplifier i digged mine out of the pile of "old" amplifiers and took some pictures.
vy73 DB8TF
What is the purpose of adding copper sheet?How does the dimension of copper sheet work out?I am curious and want to learn this reason.The pa design work I used is between 1900 and 2100. I also need such modification.
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https://github.com/ok1cdj/ADF4351-basic-LO
Here are all the references.Circuit and program based on ok1cdj
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@DO1CTI
[附= 1257] [/附加]
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To find your location on Google earth, draw a line with a ruler and drag the endpoint.You can get the Angle relative to the starting point.If the Angle is true north, it is very accurate...
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I'm interested in how you did it.
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Tell me what you think.I'll check the PDF carefully to see if it has anything to do with it.
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I found two cavity filters, the original parameters: 2400-2500. I adjusted them.The larger white final insertion loss is small - about 1db.The black one is about -2db
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Now we can be sure that the signal is not strong enough... Maybe I need a 3M antenna to receive the WB TV signal, now I use 1.2m
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I tried to receive WB beacon again today, but still failed. My position antenna elevation Angle is 18 degrees.S/N MER is 1-2 at its highest. I really missed it.But you can have a pleasant QSO in NB mode.The uplink WB mode was tested.The 250k code rate can be seen on websd-wb that my signal is only 2-3db.
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Yesterday I "umbrella" the RX antenna test.Aim at the satellite, NB signal 20 db higher than noise.WB clearly did not see any bumps on the spectrum.I am the right way to set the polarization.But I still didn't receive the WB eshail2 with minitioune beacon.I really miss...
Who can give me a minitioune. Ini configuration file?