Trying LNBF tolerance for its supply voltage drop

polgyver

Creative Tinkerer

Original poster

Pub Member / Supporter

Sep 21, 2010

487

368

Toronto

• Jun 6, 2015

• #1

I tried it only for vertical polarization, where voltage fed to LNBF is about 13 V.
With horizontal, the reception would end probably around 15 Volt.
Overall, LNBF is very tolerant for its supply deficiency...

 

Reactions: lost_mesa

N6BY

Geek

Lifetime Supporter

Mar 1, 2006

3,184

3,068

Roseville, CA 121W

• Jun 6, 2015

• #2

The LNBF works with vertical at a much lower voltage than I would have thought. What brand/model of LNBF was used here?

I am now curious to know at what voltage it actually switches from H to v.

 

Titanium

AI6US

Lifetime Supporter

May 23, 2013

7,648

9,064

Meadow Vista, Northern California

• Jun 6, 2015

• #3

Typically the polarity switch point is between 15-16Vdc.

 

Reactions: polgyver

Corrado

SatelliteGuys Pro

Apr 2, 2007

2,428

303

Hudson Valley Region, NY

• Jun 9, 2015

• #4

I always look forward to your experiments. I wish I had the time.

I notice that you are performing your testing with one of the inexpensive Far East receivers and the screen gives the audio with Dolby D displayed. Did you ever get the sound to work?

 

polgyver

Creative Tinkerer

Original poster

Pub Member / Supporter

Sep 21, 2010

487

368

Toronto

• Jun 9, 2015

• #5

The LNBF is a cheapo Seesat. When time allows, other brands will be tried for amperage.
All receivers powered with separate 12 V power supply can play Dolby. Other receivers powered directly with cord from 120 AC, do not play Dolby.
What upsets me the most with them, is their update of transponders without being prompted to do so.