Help Required - wanted, chaparral c-band scalar ring.

John

John

Enthusiast.
Messages
2,327
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.
As thread title, no feed required, just the scalar ring & must be Chaparral.
Thanks.
 
Feedsat_DXer

Feedsat_DXer

Specialist Contributor
Messages
1,910
My Satellite Setup
See signature
My Location
France
I think I have what you want , but someone else in UK may help you if you need it more quickly.
this one is as "new", never installed
let me know

sc1.JPG sc2.JPG
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
28,018
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
I'll have a look in the shed, though I think the only one I have is with integral S-Band dipole. There was also an influx of fake Chaparral feeds a few years back, I spotted a couple on my last trip to the UAE.

That seller in Cyprus I mentioned on Monday does have a bolt on feed complete with flange.

Superfeed P/N 0081 , CHAPARRAL Feed Horn | eBay
 
John

John

Enthusiast.
Messages
2,327
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 think I have what you want , but someone else in UK may help you if you need it more quickly.
this one is as "new", never installed
let me know

View attachment 121343 View attachment 121344


Thank you Feedsat - yes that's exactly what i'm after.
I'll wait and see if CH has anything lurking in his shed or if anybody else a bit closer to home has one surplus to requirements but if not i'll get back in touch with you.
 
John

John

Enthusiast.
Messages
2,327
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'll have a look in the shed, though I think the only one I have is with integral S-Band dipole. There was also an influx of fake Chaparral feeds a few years back, I spotted a couple on my last trip to the UAE.

That seller in Cyprus I mentioned on Monday does have a bolt on feed complete with flange.

Superfeed P/N 0081 , CHAPARRAL Feed Horn | eBay




Thanks CH, yep saw the feed from Cyprus but isn't exactly what's required.
If you find time to have a rummage in the shed it would be appreciated thanks.
 
Captain Jack

Captain Jack

Модератор
Staff member
Messages
10,787
My Satellite Setup
See signature
My Location
North Somerset
I do have one, which came complete with the corotor thing. I think it's something like this but I won't be down to my garage today as I am totally and utterly hanging from work Xmas do yesterday....

Chaparral C Band Feedhorn [11-6870-62]
 
John

John

Enthusiast.
Messages
2,327
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 do have one, which came complete with the corotor thing. I think it's something like this but I won't be down to my garage today as I am totally and utterly hanging from work Xmas do yesterday....

Chaparral C Band Feedhorn [11-6870-62]

No problem Alex - just need the scalar ring only (as in Feedsat's pic) though for my little project build. Have a look when your fit again lol, happy recovery
 
Captain Jack

Captain Jack

Модератор
Staff member
Messages
10,787
My Satellite Setup
See signature
My Location
North Somerset
Hi John,

Apologies for the delay - I've been lazy :)

Here are the pictures of the Chaparral bundle thing. I've never tested it, I've no idea what works or what doesn't on it.

20181224_124124.jpg 20181224_124134.jpg 20181224_124144.jpg 20181224_124200.jpg

CJ
 
Captain Jack

Captain Jack

Модератор
Staff member
Messages
10,787
My Satellite Setup
See signature
My Location
North Somerset
BTW, what's special about this feedhorn vs any other generic one out there?
 
John

John

Enthusiast.
Messages
2,327
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.
BTW, what's special about this feedhorn vs any other generic one out there?



... long story short Alex - - the design / dimensions of it.
Iv'e got a white paper somewhere from the chap that actually designed it for Chaparral and test data to show how it fairs. Most of the other PF scalar rings out there are just close copies but don't have the pedigree and performance of the Chaparral. I'll dig the paper out and post it on here chap.
 
John

John

Enthusiast.
Messages
2,327
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.
... meant to add - - the other feed / scalar pro stuff from ADL etc will be proper designed kit.
 
Captain Jack

Captain Jack

Модератор
Staff member
Messages
10,787
My Satellite Setup
See signature
My Location
North Somerset
Hm, well I have the AV Comm polariser - will a different feedhorn yield any better results? Pretty sure by current one is a generic copy (might be one that came with Zinwell)...
 
M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
Hm, well I have the AV Comm polariser - will a different feedhorn yield any better results? Pretty sure by current one is a generic copy (might be one that came with Zinwell)...


@Captain Jack


From my personal tests I have found that the polo pipe (AV-COMM) with a Titanium LNB yielded better signal levels that the same polo pipe with a Zinwell LNB. A good example was the ESPN transponder with frequency of 3980 L from 40.5W. With the polo pipe and the Zinwell I was under a lock, changing the LNB to the Titanium gave me a constant lock.

The polo pipe as shipped from Australia did not have enough internal diameter to accept the Titanium LNB. The simplest option to get the Titanium to fit is to rub down the lip on the LNB throat with some emery tape. The other option os to machine out the internal diameter of the polo pipe at the LNB end by a fraction of a millimetre or so.

If "scopus" pops along he will be able to provide his feedback on the Titanium vs Zinwell in the polo pipe. He went down a similar route.
 
John

John

Enthusiast.
Messages
2,327
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.
Hm, well I have the AV Comm polariser - will a different feedhorn yield any better results? Pretty sure by current one is a generic copy (might be one that came with Zinwell)...[/QUO
Hm, well I have the AV Comm polariser - will a different feedhorn yield any better results? Pretty sure by current one is a generic copy (might be one that came with Zinwell)...

The Zinwell ones are better than most of the cheap ones that come with the cheaper variety of lnbf's that get sold. I use a Zinwell one on the 2.2 as well.
** This is a question for you as it's more in your line - - Iv'e got the White paper doc that details the in's and out's of PF scalar rings (Chaparral inc) thats a pdf file, the whole file is worth a read because it contains references to the Chaparral feed in different parts of the file - snag is it's a 1.5 meg pdf file, any idea how i can reduce it so the forum software will accept it ?. Ta.
 
John

John

Enthusiast.
Messages
2,327
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.
@ Moonbase , solution required for my pdf file size problem above :p
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
28,018
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
... long story short Alex - - the design / dimensions of it.
Iv'e got a white paper somewhere from the chap that actually designed it for Chaparral and test data to show how it fairs. Most of the other PF scalar rings out there are just close copies but don't have the pedigree and performance of the Chaparral. I'll dig the paper out and post it on here chap.
If it is a clone then the dimensions will be identical, diameter, depth and scalar ring radii, At such a low frequency there should be no difference if both types of feed share the same focal point and bore alignment.


The only change that might occur would be down to the material used, where transparency to the signal might create a different characteristic over the full band.
 
M

moonbase

Small Dish Man
Messages
2,308
My Satellite Setup
2.0m Precision
My Location
UK
@ Moonbase , solution required for my pdf file size problem above :p

@John

If the pdf file size exceeds the forum limit of approx 1gb per file upload you could try to split the pdf into two or more files with each file being below the 1gb forum limit?
 
John

John

Enthusiast.
Messages
2,327
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.
For Captain Jack and anybody else interested in the content of scalar design, including Chaparral.
Split up into three pdf files. (thanks to Moonbase).
.....................................................................................................................................................................................................................................................................................
 

Attachments

Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
28,018
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
You're going to ask for a golden ring next.
 
John

John

Enthusiast.
Messages
2,327
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.
.. This request has now been fulfilled thanks to Feedsat DXer who kindly donated a brand new one.
Mods - please close if required.
 
Top