BSC621 Ku S+Q improvement

[minimo]

hi

Last week i find by myself a simple solution to improve the ku side .

Remove the tree screw holding the ku lnb and pull it out between 1/2 " 5/8" .

i put 3 stand off 1/2" with longer screw and my signal and quality rise from 40% to 90% . wow amazing!

More info coming this week with picture .

Nick

 

[pro96]

You put what?

 

[minimo]

standoff, spacer

Sorry for my english, i'm native french.

Nick

 

[turbosat]

I think he's saying he removed three screws, and, or , replaced them with half-inch longer ones. Don't have one of those lnbfs so it makes no sense to me.

edit: His English is better than my French would be!

 

[Anole]

Sounds like a useful fix for a disappointing device.
Thanks for sharing your info.
Looking forward to some before and after signal levels, and a few pictures.
I'm anxious to know how you keep out the bugs and rain.

Edit: Oh, come on guys!
Picture the hardware... the Ku bolts onto the back end of the C-band LNBF.
So, he removed the screws and used spacers and longer screws to move the Ku away from the dish.
Sounds all wrong to me, but I didn't try it! - :up

 

[pro96]

I have one and ama see if I can try this.. But for sure a detailed picture will help oui oui

 

[14karat]

Ok... I'm sitting here looking at mine, and that is making sense now because to get mine tuned between C & Ku, I had to adjust the focal length...
So... 1/2 - 5/8" out??
Are you weatherproofing somehow?

 

[14karat]

If we could determine the exact length needed, it shouldn't be too difficult to cut out a rubber bushing (maybe from an old car tire?) just right to act as a spacer and keep it weatherproof...

Or a stack of tar paper...? Maybe there's hope for this piece of crap after all...

 

[electrosat]

Wow, I'm really interested in this solution! If you use the spacers (stand-offs) between the KU and the C-band, what about using weather-proof tape to wrap around the gap? I know that Home Depot sells these spacers in the drawers over in the Hardware Department. Maybe not elegant, but it would work long enough to try it out.

 

[Lak7]

Also try removing the supplied Feed Cap, see if signal improves.
I use the bottom of a plastic water bottle for a Cap.

 

[1ADAM12]

Also try removing the supplied Feed Cap, see if signal improves.
I use the bottom of a plastic water bottle for a Cap.

AAAAAH-HA secrets revealed!

Very interesting thread.

In both the BSC621 and DMX741 manual they have a graphic that shows the disparity of focal points. This may be a way of correcting that.

 

[14karat]

Several of us use the water bottle trick. It helped mine pick up 5 or 10 Q points, but this spacer deal may actually make me WANT to use it again...
I'm just bummed I didn't think of it... gaaaa....

 

[Babadem]

This coulld be the answer that everyone is looking for!!!

 

[Babadem]

hi

Last week i find by myself a simple solution to improve the ku side .

Remove the tree screw holding the ku lnb and pull it out between 1/2 " 5/8" .

i put 3 stand off 1/2" with longer screw and my signal and quality rise from 40% to 90% . wow amazing!

More info coming this week with picture .

Nick

Nice info! BTW, what size dish did you use for this test?

 

[1ADAM12]

Welcome to Satelliteguys!

hi

Last week i find by myself a simple solution to improve the ku side .

Remove the tree screw holding the ku lnb and pull it out between 1/2 " 5/8" .

i put 3 stand off 1/2" with longer screw and my signal and quality rise from 40% to 90% . wow amazing!

More info coming this week with picture .

Nick

Let me be the first!

Please check your private messages.

Is this on a Prime Focus dish?

 

[madd]

Great idea.!!!!! Has anyone had success with this? I will try it this afternoon if the weather permits. I was thinking of using a custom routed ring out of 1/2"or 3/4" polycarbonate and sealing the edges with GE adhesvie silicone to protect from the elements. I hope it works.

 

[pro96]

Wonder if this makes any difference in a mini bud .. 1.2m dish

 

[madd]

I am testing a mini Bud. Testing BCS621-2 on 1.2m with sg2100. So, we will see.

 

[madd]

Sorry, I meant BSC621-2

 

[1ADAM12]

Wonder if this makes any difference in a mini bud .. 1.2m dish

Some are getting good results with flat scalar on 1.2 m offset so this may work there too.

Smaller offset may require a change in focal distance delta.

Be great if Walrus1957 would check this out on his setup.