Thread: What's the proper DC Block to buy?

I need to get one since I think I already messed up my LNBF so I wanted to know which one is the proper one to use if I want to connect to the RF input of my Uniden analog receiver and slave it to the Coolsat?

a store down here offers this one =





Steren

description says it goes from 5mhz to 1 ghz


Is this ok?

Thanks!

Originally Posted by John Popper

I need to get one since I think I already messed up my LNBF so I wanted to know which one is the proper one to use if I want to connect to the RF input of my Uniden analog receiver and slave it to the Coolsat?

a store down here offers this one =......
....
Is this ok?

Thanks!

That looks like it might be an attenuator, not a DC-block, although my spanish is poor. It "looks" like a DC-block, but attenuators look similar. (although most attenuators that I have are BNC, not F connectors). Can you translate the description? It looks to me like it's saying that it's a 3 Db attenuator with DC PASS, not DC-block, but again, it's been about 50 years since I did poorly in a Spanish class.
BTW, it's pretty hard to mess up an LNBF by mixing receivers without a DC block. I think the main danger is to one of the receivers.

You will need something that will pass at least 1450 mhz, 1000 mhz (1 ghz) is not sufficient for satellite signals.

Thats a 3 db attenuator that passes DC voltage. No good.

Try this:


DC Voltage Block Connector Adapter 75 Ohm F-Type Winegard VB-1000 Voltage Block Female to Male 1 Pack Coaxial Coupler for IR Over Coax Cable Systems Audio Video AC/DC Volt Blocking Adapter Connector, Part # VB1000: Oak Entertainment Centers and Home

Would you explain the issue, please? Slaving a Coolsat receiver to a Uniden analog receiver should not be a problem. Could that be a problem?

How is the LNBF messed up?

to the folks asking about my LNBF situation, here's what I asked in the c band section but got no answer!

someone suggested that my problem might have been due to sending twice the voltage by using the uniden analog receiver and the coolsat at the same time

Originally Posted by John Popper

I think that is what happened because I have tested every which way possible and this LNBF simply does not change polarity and now isn't even tuning TELEFUTURA which was the one channel I was able to catch.
I replaced the LNBF with my old Chaparral Feedhorn and LNB (without servomotor) and I have been adding channels first horizontal polarity and then I manually rotate the thing where the servomotor is supposed to be and I do the vertical pol channels. I am now getting many of the channels on the Skyvision list. I guess I can just buy a servomotor and use it on the old Chaparral feedhorn, but I spent almost 80 bucks on the LNBF and wanna also grab the KU band feeds.

As you can all gather by now I am a neophyte when it comes to voltage and electrical stuff but is there a way of knowing if indeed I blew the LNBF like can I take it to a electrician and ask him to test the voltage?

now if the LNBF is ok could the other possibility be that my used Coolsat is not regulating voltage therefore the LNBF doesn't work properly? have you guys heard of such scenario?

John, I haven't read through that entire thread. But, I would be surprised if you have blown the LNBF by slaving the receiver and having LNB power turned on. Yes, it is unnecessary to have LNB power on for the slave, but don't receivers have DC blocks on their slave connections?

You can test your Coolsat with a DC volt meter to see if it produces voltage for the LNBF. Measure the center of the coax to the shield. Do this for a horizontal TP and a vertical TP.

My guess is that the LNBF needs to be polarity aligned for the dish. If so, you need to rotate the LNBF in the scalar ring so that it will pick up both polarities.

I will try to find instructions for the BSC621-2 LNBF and post them.

EDIT:

Here you go:

BSC621-2 install guide

One more thing...

Is that stuff in the picture exactly what you have? It looks like an old style BSC621-2 (without an integrated DiSEqC switch) and a 22khz switch.

Universal LNBFS don't work with 22khz switches.

Originally Posted by guapoharry

One more thing...

Is that stuff in the picture exactly what you have? It looks like an old style BSC621-2 (without an integrated DiSEqC switch) and a 22khz switch.

Universal LNBFS don't work with 22khz switches.

yeah that is exactly what I have, I took that pic

but im not even using the 22k switch at this moment, I haven't even tried KU band yet and I tinkered so much with the LNBF that I am now getting wrong polarity even on analog channels, I think I made it unusable.

looks like Im gonna have to buy a new LNBF