DL2FP , you may be NEW on the transponder. F-stns are operating since the very beginning just out of the guard band. So no confusion about this +
Dear Colleagues, please help - how to Log In chat room on QO-100 WB monitor web-site? I have tried to type '/RK3DJW_Andrey', but nothing happens - it doesn't register me..
could it be possible to add two vertical lines with the selected BW in the waterfall?
This could help to guess the right BW and centering of a DATV Signal.
Similar to "Show FFT after filtering" but without blanking the upper and lower frequencies.
Have a look at my attached picture to clarify what i mean.
iw5bsf : the power meter is a usual "Daiwa NS-660P" cross-needle power/swr meter. This goes to max 150Mhz.
But i use a external (and very rare!) measuring head "Daiwa U-66S2" which works from 1,2 to 2,5GHz with 1,5/15/150W power ranges.
73s DB8TF
Hi Roberto,
i don't understand your question
Just finished modifying another UMTS PA (BLF8G22LS-160BV) this time for OM DM4DS Sandor.
Max power easy over 100W but as my power attenuator gets very hot i stopped @ 100W (320mW drive).
Signal looks clean on spectrum analyzer.
I attached some pictures from the testbench and part of the used equipment.
73s DB8TF
Werden die Themen/Vorträge auch für OMs die nicht dabei sein können über DATV übertragen?
73 DB8TF
DK5FA : die Ergebnisse sind doch meinen Messungen vor über einem Monat sehr ähnlich.
Link > What TX amplifier do you plan to use?
73
R1CAU : the new freedv mode 2020
Still noise from TP
Look for copper foil with conductive adhesive, that makes snowflaking easier.
73s
Aus dem Modul aus deinem ersten Beitrag im Thread hatte ich letztens 60W herausgeholt, ohne Snowflaking oder sonstige Modifikation. Da geht wahrscheinlich noch mehr. Gain war etwa 10dB.
Mit zwei solchen Modulen zusammengeschaltet erreichst du das Legal Limit in DL problemlos.
Genauere Untersuchungen hatte ich an der PA nicht vorgenommen da ein befreundeter OM das Teil kurzfristig ausgeliehen hat.
Wirkungsgrad würde ich aus Erfahrungswerten mit ähnlichen LDMOS für 2,14GHz bei etwa 20% ansetzen.
73 DB8TF
Sadly still no "scan" function
It would be great if this feature would be added .
73s
I know one of the seven
PA3FYM
: sorry but you are on my 100% ignore list, i don't read your posts since many weeks
It would be nice if this VHF>13cm transponder could be activated with a DTMF code on 2m VHF FM and then stays activated for a few minutes.
A always running transponder only causes QRM and confusion.
And some kind of identification is surely needed.
Still unnecessary QRM around 740
Is this QRM from that transponder?
My new BU500 is well within the regulations used with 70cm IF.
Measured already some time ago shortly after the Hamradio.
I just wondered where DK1ML got the info about the automatic LO switching.
