Transverter PE1CMO and KUHNE Down-Konverter

HB9RYZ

Hello,

how do you solve the problem of only one RX-plane in the BAMA-Tech 10GHz horn ?

You just can have one plane (H or V) with this feed. For the change of polarisation you have to turn it 90° in its mounting bracket.

Or do I miss something ?

73 de Johannes

HB9RYZ

Hello Wolfgang,

the converter can not switch between polarities, when there is no physical antenna for this polarity. The "Hardware" (BAMATECH-Feed) has only one "antenna" for 10GHz for one polarisation plane. There is no second "antenna" in the horn for the other plane (you consecquently would have also two Output sockets for the two planes, but there is just one SMA-10GHz-output. (When you open a LNB you see two "antennas" (i.e. pieces of wire) orientated 90 degree to each other. Thus you can switch between horizontal and vertical).

With the KUNE converter you can switch between the frequencies where the Signal is convertd to, but not the polarity of the antenna.

Sorry - but I am just the bringer of the "bad" news.

73 de Johannes

Hallo Kuhne converter user,

on request BaMatech delivers the antenna with two antennas for the two planes. What you need is a high quality coaxial relay to switsch between the two planes. The relay can be suppled via switch Output of the converter.

73 Hans-Jochen DK1MG

HB9RYZ
Hallo Wolfgang.
Telemeter Electronic bietet solche Relais an (Koaxialrelais Serie TR02).

73 Hans-Jochen DK1MG

HB9RYZ

Hallo Wolfgang,

im Telemeter-Shop wir ein SMA Koaxrelais Typ: F12S164 für 114,00€ + MwSt angeboten. (12V Betriebsspannung SMA-Buchsen bis 18GHz geeignet)

73 Hans-Jochen DK1MG

Hallo,

vielen Dank für die Info mit dem neuen BAMATECH-FEED und der Relais-Umschaltung. Das sollte klappen - Viel Erfolg !

Servus Johannes

P.s. Ich bleibe lieber bei meinen GPSDO-modifizierten 3 Euro LNB, welches schon in einem wasserfesten Gehäuse ist und nur eine Lötstelle zwischen den Antenne und dem "Konverter" hat - und das ganze an einem POTY - da geht SSB und DATV

Hallo Johannes,

ein Kompromiss: Wenn du den Feed unter 45 Grad montierst, kannst du beide Polarisationen empfangen. Du solltest es probieren ...

73, Martin

Quote from HB9RYZ

This is now the solution to avoid any future LNB issues

BaMaTech special Dual-Feed with two SMAs and a relay to switch from H to V via the KUHNE Down-Konverter.

73 de HB9RYZ

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Is the special Dual Feed available? I cannot see it on the Bamatech site? How would you connect it to the Kuhne downconverter?

David G4NRT

G4NRT

Hallo David,

write a E-Mail to info@bamatech.de. They offerd me the antenna for 97,00€ incl MWst.

73 Hans-Jochen DK1MG

Thank you! Email sent!

I already have the previous model with the Kuhne down-converter attached. I will need to look at the mounting of that together with the SMA relay.

David G4NRT

HB9RYZ

Hello Wolfgang,

I modified this LNB (and many others of different typs) myself for external referenze input. In the moment I use a megasat Diavolo dual LNB. I use one F-connector for ZF and feed the LO (from Leo Bodnar GPSDO) via the other F-connector. I can Change the LO so that I can have a ZF from at least 400-1500 MHz - )70cm or 23 cm Amateur band included).

dl9sad

Thank you for the hint - i knew already. But you loose remarkable signal strength. For NB it is not so important (I have a 1,2m dish). But even with this dish weak WB-transmittions can not be decoded, which can be seen with a right alligned LNB.

BTW: Thank you again for the program you gave me !!!!

73 de Johannes