what brand and model of band pass filter is required after the pluto sdr?
also is there any suggestion for bias-t?
any tested models for buck converters as I am afraid of high noise or is that something not concern?
Some SAW BPF:
73 ! PY1SAN
Posts by PY1SAN
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Hi Bert,
I use Airspy R2 SDR, SSB SP-200 Preamp and ANjo Eggbeater.
It's only a very simple setup at the moment to run the SatNogs software, but it works very well to see what's going on in the 2m satellite band.
73s Peter
The signals recorded on your station's SATNOGS are strong. Impressive for a simple Eggbeater. Very good signals.
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Tnx Marcel !
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Unfortunately here dont have fleamarket with SSPA! I thinks in the future is possible. I buy some things of others countries.
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Great !
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I recorded a movie how my TRV works !!!!
Video unavailable.
This video is private.
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Hello Wolfgang,
Thanks.I have updated my description about the MHL21336 amplifier at www.dd1us.de
Kind regards
Matthias
Hi Matthias DD1US .
I made this amplifier using your schematic. I bought the module in september 2019 (Ebay) but i assembly this week. My module isnt counterfait. I supply with 28v in both pins and i have approximately 2 until 3 watts ( sorry, but i dont have how calibrate measurement equipment ).
73!
PY1SAN
GG77SN
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Some info:
"These modules in turn utilise detectors such as the D8318 device from Analog Devices....
http://wiki.villagetelco.org/RF_Power_Meter ( RF_Power_Meter )
73 !
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Hello together, hello Hans-Michael,
look also at https://dd0yr.de/Bilder/13cm-PA/13cmPowerPa.pdf .
73 Wilhelm
Great !
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sorry I don't understand 000,000 frequency ???
Yes.
If I tune WB Beacon 742.600 mhz and restart dvb-s gui and start over, the screen will display 000.000, but I tune the last frequency (742.600). Why ? I dont know !
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Tested with Adalm Pluto the WB Beacon and 90cm dish.
Tnx !
73
Sandro Ribeiro
PY1SAN - GG77SN
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G0MJW: 8PSK modcodes are not supported in version 2.0.10. They were first introduced in version 2.0.12
But you are right about the UI Design. Many Laptops have 1366x768 as a resolution, but the window is about 947 pixels high. I'll try to move some stuff around and clean things up. Never thought about high DPI displays. I'll also address this problem soon.
I'll release a new version (2.0.13) today with a few fixes. In summary these are: 8PSK short frame support, GUI cleanups (and new tooltips), and support for offset tuning by clicking the right mouse button. There is also an overlay showing transponder bandwidth requested by DB8TF.
There is also a 100% performance update for FIR filtering (atleast on my CPU). These two changes will be useful for future extensions like multi transponder decoding.
Tnx SWL - markro92 !
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Thanks Matthias for all descriptions !
73!
PY1SAN
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Hi Jerry,
Thank you for your comment. I think my inputs are correct in LOTW. By the SAT mod is very optional and not taken into account in LOTW. I have more confirmation on eQSL. That would be so nice to have a common system instead of multiple services !
When subscribing to LOTW I thought that would be the more efficient. And it is for HF QSO...LOTW & Sat´s: QO-100 QSO Confirmation eQSL, LoTW, DARC, etc.
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The latest QO-100 Presentation is available as PDF here;
https://amsat-dl.org/eshail-2-amsat-phase-4-a/
or for direct download:
Hi Peter.
Congratulation to AMSAT-DL and QARS for the great satellite.
Yesterday, more one new brazilian station started to work on NB TP.
73 !
PY1SAN
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Hi Sandro,
Is that right, please? What's the Idq please? If I know, it is needed around 0,3 to 0,5A idq at least. So there is max. 0,6A of active current as photo shows.
24V x 0,6A x 50% eff. = 7,2W out
I am running 28V with Idq 0,5A. The output is modified by idea DK5DN
and input is my idea - make PCB line (add wire and solder) thick as I can. I am reaching 28V/2,2A in key down. There is 2W input (or less!) from LZ5HP transverter. I dont know the output. No power meter SRI.
Hi Viliam.
I used idq around 0,33 amp.
My wattimeter have a slow rate measurement and i dont have how accuracy calibrate.
My tests i used 18 to 32 vdd. To 30 vdd, the current was 1,75 amp.
Some months ago i quited this project and started other LDMOS.
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The 10 MHz to 25 MHz converter is now in a box. A 74HC390 dividing by 2, the xtal ladder and a MAV11 MMIC. An another MAV11 is required to drive the LNB.
Great !
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Do you have any indication of the actual output power of the MFR21045??
Cor
OUT: 21W
IN: 2W
24VCC
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today we built the full PA equipped with all boards,
the board in the middle is the (already released) 10W-PA. Right of it is the prototype 30W booster and at the left is a small universal board with an attenuator to fit the input to the 50mW of the Amsat TX mixer.
All boards can simply be screwed to a cooler, but we did an aluminium box, just for fun. The red plug is the 24V supply (2A max) and the black plug is the PTT input.
The 10W-PA followed by the booster has these data:
Output: 26 watts Peak
Input: 10mW (for full output, nice to be used with an SDR)
Gain: 34 dB
Efficiency: 48%
in my case I have put an 10dB attenuator in front of the PA, so I need 100mW for full output.
This small board (in the picture on the left) has pads for up to 5 SMD components (0603 or 0805). It can be used as attenuator, filter or whatever is needed.
The RF lines of all boards are at the same position, so all boards can be easly stacked together with a solder bridge. Alternatively SMA connectors can be soldered to each board's input and output.
I have ordered a couple of these filter boards and also the booster, should arrive end of this week, as usual you may contact Ernst (dl1ev@gmx.de) if you need empty boards.
Best 73
Kurt, DJ0ABRGreat job. I try MRF21030 and MFR21045
