Advice Needed Uniden UST-771 positioner

John

John

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North Nottinghamshire.
Help! ....
I picked up one of these a few months ago mainly for nostalgia reasons and was now thinking about using it to drive a 1224 HH motor for my Ka 1.25 Gibby installation but have a niggling doubt about the sensor connection on the 771.
I seem to recall that there was some sort of interface box needed between the 771 and the reed switch in the 1224 ??... can't really remember it was that long ago.
Any help greatly appreciated.


Uniden USD 771 positioner....reduced...jpg
 
Vipersan

Vipersan

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From what I remember ...they worked fine with reed pulses ...but were a bit limited insofar as they are not diseqc capable ...but should work ok ..
Dont quote me on this but dont you also need a receiver to store settings ...otherwise it is just a manual positioner.
Does it have its own remote control ...
Maybe it does have internal memory store ...in which case ...with a remote ..you're good to go .
??
 
John

John

Enthusiast.
Messages
2,368
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
Thanks VS, will only use it as a manual positioner and diseqc not required. It's been 25yrs or so when i had one of these and as you know info on these things are very rare & scarce.
I was just a bit unsure which two terminals to go across with the reed sensor connection ?.


Uniden UST 771 positioner circuit ....reduced...jpg
 
Vipersan

Vipersan

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My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
I suspect Sen and Gnd (G) ...
The + 5v ...may have been either for a potentiometer type sensor or led interupted beam (optical)...or 5v for a corotor (skew) ...but again ..dont quote me on this ..
Hopefully you will get more replies to confirm ..

rgds
VS
 
Channel Hopper

Channel Hopper

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From what I remember ...they worked fine with reed pulses ...but were a bit limited insofar as they are not diseqc capable ...but should work ok ..
Dont quote me on this but dont you also need a receiver to store settings ...otherwise it is just a manual positioner.
Does it have its own remote control ...
Maybe it does have internal memory store ...in which case ...with a remote ..you're good to go .
??
The 771 has buttons under the front flap to programme limits and around 30 positions . Then there is a dedicated remote, or one that also operates the 7007 receiver.
 
John

John

Enthusiast.
Messages
2,368
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
The 771 has buttons under the front flap to programme limits and around 30 positions . Then there is a dedicated remote, or one that also operates the 7007 receiver.
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Thanks @CH & @VS, think i had the 7007 as well but it was soooo long ago. This UST-771 came with the remote and both are in pristine condition for their age, no scratches dinks, nowt. Had to grab it for old times sake. It's only going to be shifting between 19 / 16 / 7 & 4.9 deg East for Ka use on the newly aquired 1.25 Gibby for the time being.
BTW @VS, Sens-Gnd was fine for the reed sensor on the 1224 & 771. Ta.
 
S

s-band

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I'm still using one with a standard reed Superjack. If anyone wants to sell a UST771, I'm in the market.
The manual is too big to post here so I'll e-mail it. If anyone else want it, PM me.
VS & CH both correct
You may have to replace the back-up battery. Mine only lasted 24 years.
 
Last edited:
John

John

Enthusiast.
Messages
2,368
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
I'm still using one with a standard reed Superjack. If anyone wants to sell a UST771, I'm in the market.
The manual is too big to post here so I'll e-mail it. If anyone else want it, PM me.
VS & CH both correct
You may have to do is to replace the back-up battery. Mine only lasted 24 years.
........................................................................................................................................................................................................................................................................................................................................

Didn't know you were a fan G ...... this really is a blast from the past for me. Battery seems ok on this one.
Iv'e got a circuit diagram of a sort for it but it's not got much else, would love to gain more info if you don't mind sending it to me please.
Done any more on the 1.8 ?.
 
Vipersan

Vipersan

Emmett Browns Ghost
Staff member
Messages
10,918
My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
The only stand alone positioner I still have (complete that is) ...from the analogue days
Anyone remember the NEC 2025 mkII ?
 
Lazarus

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Vipersan

Vipersan

Emmett Browns Ghost
Staff member
Messages
10,918
My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
Vipersan

Vipersan

Emmett Browns Ghost
Staff member
Messages
10,918
My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
Just had to go up in loft for this photo ..
underneath was the 2025 mkI ...which still worked until I robbed a transformer from it ..
the mkII was a much more pleasing box to look at ..
and somewhere I still have the accompanying receiver ..which if I remeber rightly was the 2022 ..
but now buried somewhere up there ..
lolDSCF0003.JPG

It's a miracle the ceiling hasn't collapsed ..there is so much vintage crap up there ..
Like ...My strong STR1500 receiver postioner combo ...and a Discus Elipse combo plus a nice Echostar ...that did both analogue ..and digital If I remember correctly..
 
Last edited:
John

John

Enthusiast.
Messages
2,368
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
Just had to go up in loft for this photo ..
underneath was the 2025 mkI ...which still worked until I robbed a transformer from it ..
the mkII was a much more pleasing box to look at ..
and somewhere I still have the accompanying receiver ..which if I remeber rightly was the 2022 ..
but now buried somewhere up there ..
lolView attachment 96475

It's a miracle the ceiling hasn't collapsed ..there is so much vintage crap up there ..
Like ...My strong STR1500 receiver postioner combo ...and a Discus Elipse combo plus a nice Echostar ...that did both analogue ..and digital If I remember correctly..
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I'm glad you went in the loft for that pic , i googled for it but didn't come up with anything ;)
 
S

s-band

Specialist Contributor
Messages
833
My Satellite Setup
1.5m IRTE PF, Octagon OSLO external Ref., TBS6983,
Various L, S, C, X & Ka bits. 1.2m S/X/Ku/Ka Prodelin on Az-El
My Location
SE UK
Didn't know you were a fan G ...... this really is a blast from the past for me. Battery seems ok on this one.
Iv'e got a circuit diagram of a sort for it but it's not got much else, would love to gain more info if you don't mind sending it to me please.
Done any more on the 1.8 ?.
I can't remember how I got it in around 1988. I didn't use it at the time as I had Echostar 4500/5500s in analogue days. It has been used since about 2004 when I go t a Dreambox.

I found the flyer (attached) and noticed that the ust771 only stores 20 positions. There's so much slack in the positioner that I use a spec an or the counter to find sats either side of main positions.

CM 1.8 update posted Channel Master 1.8 Restoration
 

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