Posts by iw5bsf

    Hi Roberto,

    Schematic is very simple. As per datasheet do not drive more than 5 mW at the input (50 ohm), put 12 to 28 Volts on pins 2 and 3 depending on the output you want and output is at pin 4 (50 Ohm).

    See the photograph for the decoupling of the powerlines. Take several values of capacitors, I did 22pf, 5000pf and 100nf. Any series inductor from the junkbox will do.

    Take attention to get a good ground connection, remember it is 2.4GHz...

    Hi I received the mhl21336 from ebay sorry, am I going to know the two large capacitors you see in the value of the photo? and the small ones I think are 22 pf, and the two value inductor?

    tnx Roberto

    Thanks and a cable that I had at the station yes, I do not like the optimal bnc are definitely N the size I made with a directional coupler and an hp436a bolometer and a hp8673d signal generator these are my means of availability

    thanks again for the advice

    for amp I am experimenting with rf126 1 watts followed by draiver vna25 with input +10 dbm I have to print the pcb

    With all due respect, I doubt this value as no datasheet of the various H155 variants suggests an attenuation of <0.1dB/m @2400 MHz. BNC is not optimal as well on 13cm, but this is another issue. My point is that the H155 cable is a 5-6mm OD cable and even a 1/2 inch cellflex coaxial cable (LCF12-50) only reaches 0.11dB/m.

    That said, 1dB difference is barely noticable in daily life unless you have QRO amplifiers or cable in front of the LNA :)

    Thanks and a cable that I had at the station yes, I do not like the optimal bnc are definitely N the size I made with a directional coupler and an hp436a bolometer and a hp8673d signal generator these are my means of availability

    thanks again for the advice

    also as "RYRYRY DE QO4FUN" with 50 baudot on 620,

    uplink QRG not stable, is constantly corrected irregularly ...



    hello Peter, I'm preparing the station, in fact I had noticed these phenonemes in the past while I was listening I agree with what you say

    Roberto

    hello everybody I tried 3.5 m of h155 cable with two bnc that I loss 0.37 @2400

    I use Airborne-10, it has 0,19dB/m loss on 2G4


    https://messi.it/dati/immagini/AIRBORNE10-All2_EN.pdf


    73

    Roberto

    I just got delivered today 1.5m of Ultraflex 7 from http://www.kabel-kusch.de made to order including 2x N. measured loss 0.55 dB @2405 MHz, including connectors.

    hello test 3.5 m of h155 cable with two bnc that I loss 0.37 @2400

    Roberto

    thank

    yes interesting thanks I take note of it

    Roberto


    iw5bsf look at this..may be this will fit for you as well..

    https://www.wlan-shop24.de/Koa…Loss-Wetterfest-Meterware

    :)


    Good morning to all the cables 2.4 ghz that I can use at low loss, I looked lmr600 but it seems to me a very high price and in Europe it seems to me that maybe you don't find an alternative?

    Roberto

    web site link

    h-155 0,49 db/m @ 2400 MHz

    rf-240 0.42 super low loss

    Good morning to all the cables 2.4 ghz that I can use at low loss, I looked lmr600 but it seems to me a very high price and in Europe it seems to me that maybe you don't find an alternative?

    Roberto

    thank you when I modified LNB OCTAGON with external reference. I use a 27 mhz crystal oscillator ex PH with a very stable low noise -149dbc made at home, now I have to start thinking about the transmission

    Hi Roberto,

    Schematic is very simple. As per datasheet do not drive more than 5 mW at the input (50 ohm), put 12 to 28 Volts on pins 2 and 3 depending on the output you want and output is at pin 4 (50 Ohm).

    See the photograph for the decoupling of the powerlines. Take several values of capacitors, I did 22pf, 5000pf and 100nf. Any series inductor from the junkbox will do.

    Take attention to get a good ground connection, remember it is 2.4GHz...

    ok have you tried in ssb how it works?

    Hi Roberto,

    Schematic is very simple. As per datasheet do not drive more than 5 mW at the input (50 ohm), put 12 to 28 Volts on pins 2 and 3 depending on the output you want and output is at pin 4 (50 Ohm).

    See the photograph for the decoupling of the powerlines. Take several values of capacitors, I did 22pf, 5000pf and 100nf. Any series inductor from the junkbox will do.

    Take attention to get a good ground connection, remember it is 2.4GHz...

    thank

    Roberto

    interesting PA 3 WATT I am preparing I wanted to know from Cor PA0P if possible have the schematic I wanted to do it and how much power should the module insert?

    73 de iw5bsf Roberto