Posts by PY1SAN

Quote from DD1US

Hello Wolfgang,

Thanks.

I have updated my description about the MHL21336 amplifier at www.dd1us.de

Kind regards

Matthias

http://www.dd1us.de

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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

This topic is about translate 0.8Vpp TCXO output clock to 1.8V CMOS level input :

http://e2e.ti.com/support/logi…985574#2985574?jktype=e2e

But i will try use MMic too.

PY1SAN

GG77SN

Quote from DL3ED

So Mic,

habe die Schaltung etwas verbessert und bekomme hinter den MSA jetzt 1,5 VPP raus und musste noch einen Spannungsteiler dahinter machen. Jetzt habe ich 1,3 VPP.

Hi !

C8 = 100 pF and C10 = 100 nF ?

I thought that C10 the value is too high.

Tnx !

73 PY1SAN

GG77SN

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 !

Quote from VE4SW

I took the old one out and added an IPX connector instead. Allows for external reference input of whatever frequency.

Clean solution.

Quote from dl6dca

Hello together, hello Hans-Michael,

look also at https://dd0yr.de/Bilder/13cm-PA/13cmPowerPa.pdf .

73 Wilhelm

Great !

Quote from ik1hgi Tony

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 !

@SWL - markro92,

Tested with Adalm Pluto the WB Beacon and 90cm dish.

Tnx !

73

Sandro Ribeiro

PY1SAN - GG77SN

Quote from SWL - markro92

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 !

Thanks Matthias for all descriptions !

73!

PY1SAN

Quote from F4HGU

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.

Quote from DB2OS

The latest QO-100 Presentation is available as PDF here;

https://amsat-dl.org/eshail-2-amsat-phase-4-a/

or for direct download:

https://amsat-dl.org/wp-conten…Hail2-AMSAT-DL-latest.pdf

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

Quote from om0aao

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.

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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.

Quote from SV1BDS

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 !

Quote from PA0P

Do you have any indication of the actual output power of the MFR21045??

Cor

OUT: 21W

IN: 2W

24VCC

Quote from dj0abr

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, DJ0ABR

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Great job. I try MRF21030 and MFR21045

Quote from dj0abr

it took some time to get the new PCBs, but they arrived this week.

The first board which is finally released is the 10W amplifier.

10W means, compression begins at 10W output. In SSB we can expect an average power of 2,5 watts and if a speech compressor is used up to 4 watts, which works well with many QO-100 antennas. Gain is 17 dBm. We built a couple of board and no additional tuning was required, all worked immediately, so you usually don't need any measurement equipment except a DC voltage/current meter.

The board has a PTT circuit now. The quiescent current is only ON during TX. The requirements for a cooler are very low (in SSB only), a piece of aluminium or any other cooler is usually sufficient.

The complete development documents are available for everybody for free. Please see here: www.dj0abr.de .

A member of our local club, Ernst, dl1ev@gmx.de, has empty boards available. If you want to get a board, please write an email to Ernst and ask for board number: 10821.

The next step is a 30 watt booster which can be connected between the 10W PA and the antenna. The prototype is already working, currently I wait for the final boards.

vy 73
Kurt, DJ0ABR

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Great ! Nice job !!!

Quote from dj0abr

as promised I give you an overview on the progress for building a low cost PA for es'hail-2 NB transponder.

We have the prototype finished and tested. It is running fine.

The total cost of material of the amplifier is about 20 Eur only.

The performance data are:

at 12V/850mA

output power is 5 watts

with 100mW input (nice fit to the Amsat TX mixer board)

at 24V/680mA

output power is 10 watts
with 200mW at the input.

You can read more detailed information here:

English:

https://www.helitron.de/dj0abr…sh/technik/sat/sat_pa.htm

German:

https://www.helitron.de/dj0abr/german/technik/sat/sat_pa.htm

since this prototype works so well, we will continue with a second version including a PTT circiut and a few other parts. But we keep it simple so everybody can build it easily.

If more gain is required (i.e. for SDR transmitter), simply two of these boards can be chained, giving a total gain of up to 34 dB. I have used two boards in series for the power tests because my generator has only 10mW max output.

All parts are available worldwide from digikey or mouser.

I have 4 PCBs left, if anyone wants to build it, just write me a forum-message.

The part list, circuit and gerber data will be published on above web pages during the next days.

vy 73
Kurt, DJ0ABR

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Congratulations Kurt.

Last month i tested two PA without sucess ( Counterfeit parts and re tuning 2100 mhz LDMOS) . I will try to buy MHT1008N for test.

73 !

PY1SAN

Sandro

Other comment.

My arduino is 5v. The ADF4351 is 3v3.

I used some resistors the pins Clock, Le and Data.

PY1SAN

73 !

Quote from DL1ARS

PY1SAN

Do you have the code for the Arduino Nano for me?

DL1ARS .

I used the code below:

ADF4351

After, I determined only one frequency ( my LO is 1127 MHz) and removed the LCD.

PY1SAN

73 !