New correct LNBF replacement, odd/even 119

[sunnyvalejim]

I (believe I) have a problem with the LNBF on my Dish 500.

I installed a Dish 500 a few years (5?) ago and it looked just like:
4 cables came from two LNBF's to (2) SW21's.
2 cables from Sat 110 LNBF, and 2 from Sat 119 LNBF, each SW21 got a 119 and a 110 cable. I had a Dishplayer 7200 at the time.
Now I have a 508 and 301.

A couple years later a had Dish install a local channel dish for 148.
Now when I went to look at the installation things at the Dish 500 have
really changed!

It looked like they took the two cables I was using for Sat 110 and used them for Sat 148, and Sat 148 is via Dish 500 with one LNBF on it - I think
one from my original Dish 500 install that has two connectors.
On the Dish 500, there is now only one cable to the 110 side, and one cable to the 119 side (my old 119 cable pair). And the LNBF's only have one
connnector on (each) of them - and it is one assembly.
? Is there a switch built in to this "Quad" (?) LNBF?
I seem to get 110 and 119 on each of the cables coming from the Dish 500.

My problem: I do not get 119 EVEN polarity transponders when it gets cold.
I finally verified this problem with a blow dryer up at the LNBF last night. I minute or two of warm air restored the signal strength on the even 119
transponders. Everything else (odd 119, even/odd 110, and even/odd 148)
all work fine at both receivers.

What is this "Quad" LNBF with two ports that needs replacing? Is it
a DIsh Pro (it just says on the LNBF "Digital LNBF BS1D1UP201M Lot E19"?
(No model # noticed)

Is replacing "Digital LNBF" my best bet (or does going back to the duals, two more cables, and another SW21 work - even if it does it would seem to be more work and probably cost at least as much) ?

Thanks for any help.

 

[Mr Tony]

sounds like they switched the 2 duals on the Dish500 for a Twin which is easier to work with

If you know the LNB goes bad, get a Legacy Twin and replace the existing one you have

 

[Liquidforce88]

Sounds like you have a bad LNB, water getting into the system, or loose connections at the LNB.

Sounds like you have a Legacy Quad on a Dish500 for 119 & 110. Then you have a Legacy Dual on the dish for 148. This would then be combined with an SW-21 to give you 119 + 110 + 148, on each cable to the receivers. Does your check switch say something like SW21-3?

Check the connections on the Quad make sure that they are not rusty or loose. If the are HEX crimp fittings you may want to replace them with compression fittings. Also see if the white part of the cable is up to the lip of the connector. If it is deep inside the connector that could be your problem. It really sounds like a connection problem to me.

 

[sunnyvalejim]

Re: reply 1 and 2
Is a LNBF Legacy Twin the same as a Legacy Quad?

The cable to the 119 LNBF is an original "from the factory", but I do not
know if it is crimped (I would think so) or compression fitting. I checked it
for tightness first, it was a little loose (1/4 turn). Tightening didn't seem to help.

Rain (water) doesn't seem to make much of a difference.

Temperature does for sure. perhaps condensation, but I would have this problem of losing the even transponders around 2am during San Jose, CA summertime.
Not much dew or condensation then.

 

[jkinser]

Dual LNBF: One "eye", sees a single orbital slot, two cables out, no built-in switch
Twin LNBF: Two "eyes", sees two orbital slots, two cables out, built-in switch allows each cable to transmit the signals for both sats.
Quad LNBF: Two "eyes", sees two orbital slots, four cables out, built-in switch allows each cable to transmit the signals for both sats.

Note: The DishPro Plus Twin LNBF also has an input port to connect a dual LNBF to it's internal switch. DPP Twin also allows for a single cable run to a dual tuner receiver when used with a DPP separator.

 

[SimpleSimon]

You have a Legacy TWIN, not a Quad. The equipment changeout was exactly correct.

As has already been mentioned, check ALL your connections for corrosion - it's not necessarily rain "right now", but damage from the past.

You didn't mention whether this problem occurs on both receivers. If so, with your setup, it's likely to be a bad LNBF. If NOT, swap the two feeds or receivers, and see if the problem moves. If so, continue isolating the problem by taking notes as you swap things around - it's standard deductive reasoning.

 

[sunnyvalejim]

OK, thanks, based on that
I had 2 dual LNBF's that Dish had changed to a Twin LNBF.

The twin LNBF is now afraid of the cold on 119 even, so I will
get a repalcement.

Thanks to all!