Date   

Re: Weinheim 2006

regwoolley@...
 

In a message dated 10/07/2006 16:24:38 GMT Standard Time, geoffg7rmg@... writes:
Weinheim this year is couple of weeks later in September  instead of the normal first weekend..something to do with the school not be available at the normal time.
 Geoff M0RMG
I always was later in Sept. than its has been the past few years Reg G8VHI


Weinheim 2006

geoffg7rmg@...
 

Weinheim this year is couple of weeks later in September  instead of the normal first weekend..something to do with the school not be available at the normal time.
 Geoff M0RMG


Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opport...

Conrad_G0RUZ <conrad@...>
 

Yes read my email again Mike, anything that hits the LNB directly is the relevant part.
 
Conrad


From: ukmicrowaves@... [mailto:ukmicrowaves@...] On Behalf Of mikeg3pfr@...
Sent: 09 July 2006 22:19
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opport...

In a message dated 09/07/2006 18:25:01 GMT Daylight Time, conrad@... writes:
Actually Heath the satellite RX's have pretty good immunity to off channel signals. At work, we routinely test a wanted signal at -60 dBm with a cw and QPSK interferers at +15 dBm at +/- 36 MHz for a 30 Msps signal, provided that the interferer is outside the passband of the SAW filter  and doesn't hit the AGC too hard the Rx's are quite good. Of course this is in the 950-2150 MHz region. Anything that hits the LNB directly will cause a desense or severe degradation of the noise floor due to RM effects. The LNB LOs are not all that good generally, and the dynamic range of a typical LNB is not excellent.
With respect, Conrad,
 
that's hardly the same thing as +55dBW "next door" to the LNB, or, in other terms, oob signals in the Amateur Satellite band (and possibly elsewhere) at +15dBm, to say nothing of spurious mixing products and other non-linear  products due to "overdriven" LNBs (disregarding the 950 - 2150MHz IF).
 
Notwithstanding possible massive "cross-frontier" QRM to other services under "normal" forward troposcatter conditions, let alone under any kind of lift conditions - we, as amateurs, know that power levels seldom above +10dBW cross national frontiers...and don't forget we amateurs are using sota equipment and working with signals at -120/130dBm....
 
Think about it - I'm sure that this has been very poorly researched by Ofcom.
 
As well as which the ITU RRs state +45dBW erp..... +10dBW Tx power and (max) +35dB antenna gain = +45dBW not +55dBW. Not that a mere +10dBW is going to make that much difference!!
 
Food for thought?
 
Regards, Mike G3PFR


Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opport...

mikeg3pfr@...
 

In a message dated 10/07/2006 07:38:15 GMT Daylight Time, conrad@... writes:
Yes read my email again Mike, anything that hits the LNB directly is the relevant part.
OK! Apologies, but you might have made the point a bit more forcefully, as it is, as I see it, a major, major problem waiting in the wings!
 
regards, Mike, G3PFR


Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opportunities

Conrad_G0RUZ <conrad@...>
 

Actually Heath the satellite RX's have pretty good immunity to off channel signals. At work, we routinely test a wanted signal at -60 dBm with a cw and QPSK interferers at +15 dBm at +/- 36 MHz for a 30 Msps signal, provided that the interferer is outside the passband of the SAW filter  and doesn't hit the AGC too hard the Rx's are quite good. Of course this is in the 950-2150 MHz region. Anything that hits the LNB directly will cause a desense or severe degradation of the noise floor due to RM effects. The LNB LOs are not all that good generally, and the dynamic range of a typical LNB is not excellent.
 
73
 
Conrad G0RUZ 


From: ukmicrowaves@... [mailto:ukmicrowaves@...] On Behalf Of Heath, GW3HWR
Sent: 09 July 2006 11:18
To: ukmicrowaves@...
Subject: [ukmicrowaves] Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opportunities

Hi all,
 
I wonder how much thought has been given to possible overloading of domestic satellite receivers by transmission in the 10.475 to 10.575GHz sub-band. ITV has bouquets at 10714 and 10758MHz and the BBC at 10773, 10788 and others; domestic satellite receivers are extremely sensitive and the RF 'front end' is wideband (typically 1.8 to 2.0GHz), I suspect the protection at some 130MHz off-channel is minimal. Provision needs to be made for compensation of viewers who loose their ability to receive satellite television, otherwise this assignment is unsuitable for use in populated areas. Is BREMA still effective?
 
Or am I talking nonsense again?
 
73, Heath.


Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opport...

mikeg3pfr@...
 

In a message dated 09/07/2006 18:25:01 GMT Daylight Time, conrad@... writes:
Actually Heath the satellite RX's have pretty good immunity to off channel signals. At work, we routinely test a wanted signal at -60 dBm with a cw and QPSK interferers at +15 dBm at +/- 36 MHz for a 30 Msps signal, provided that the interferer is outside the passband of the SAW filter  and doesn't hit the AGC too hard the Rx's are quite good. Of course this is in the 950-2150 MHz region. Anything that hits the LNB directly will cause a desense or severe degradation of the noise floor due to RM effects. The LNB LOs are not all that good generally, and the dynamic range of a typical LNB is not excellent.
With respect, Conrad,
 
that's hardly the same thing as +55dBW "next door" to the LNB, or, in other terms, oob signals in the Amateur Satellite band (and possibly elsewhere) at +15dBm, to say nothing of spurious mixing products and other non-linear  products due to "overdriven" LNBs (disregarding the 950 - 2150MHz IF).
 
Notwithstanding possible massive "cross-frontier" QRM to other services under "normal" forward troposcatter conditions, let alone under any kind of lift conditions - we, as amateurs, know that power levels seldom above +10dBW cross national frontiers...and don't forget we amateurs are using sota equipment and working with signals at -120/130dBm....
 
Think about it - I'm sure that this has been very poorly researched by Ofcom.
 
As well as which the ITU RRs state +45dBW erp..... +10dBW Tx power and (max) +35dB antenna gain = +45dBW not +55dBW. Not that a mere +10dBW is going to make that much difference!!
 
Food for thought?
 
Regards, Mike G3PFR


Re: 1.5m dish at maplins

Mike Willis <m.j.willis@...>
 

Understood Brian, but as this Maplin dish appears to be prime focus I think we can assume the VE4MA feed will work. I do wonder why bother though as it appears to come with a range of matched feed options and even OMTs which should cover the band of interest.

g4nns wrote:


Re-reading my last posting perhaps I should have made it clear that
my comments were in response to the statement to the effect that
most Sat TV antennas have an f/D 0f ~ .38. Which is of course true.
But most TV antenae are offset not prime focus. The VE4MA feed
should work well with the Maplin dish but the Septum feed may need a
choke.


Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opportunities

Mike Willis <m.j.willis@...>
 

Hi Heath,

Nonsense it is I am afraid, as in it has always been the case that deploying poor quality receiving equipment does not give you a right to veto another radio band user.

Just imagine what would happen to the amateur service if it was! In practice, most satellite reception in the UK by domestic systems is at a relatively high elevation, so to get a signal strong enough to cause disruption needs a close co-location of equipment. Putting the broadband trx and satellite dish on the same pole might be a problem, but installing one across the street will probably not be.

In fact, it is an ideal band to share as both systems should be able to co-exist without interfering. The alternative would be to find 100MHz in another band. The amateur sections of 13cms and 9cms seem pretty quiet most of the time.

Mike

Heath, GW3HWR wrote:


Hi all,
I wonder how much thought has been given to possible overloading of domestic satellite receivers by transmission in the 10.475 to 10.575GHz sub-band. ITV has bouquets at 10714 and 10758MHz and the BBC at 10773, 10788 and others; domestic satellite receivers are extremely sensitive and the RF 'front end' is wideband (typically 1.8 to 2.0GHz), I suspect the protection at some 130MHz off-channel is minimal. Provision needs to be made for compensation of viewers who loose their ability to receive satellite television, otherwise this assignment is unsuitable for use in populated areas. Is BREMA still effective?
Or am I talking nonsense again?


Re: Ofcoms Auctions off 10GHz Amsat Band and mmWave Opportunities

Heath, GW3HWR <gw3hwr_2@...>
 

Hi all,
 
I wonder how much thought has been given to possible overloading of domestic satellite receivers by transmission in the 10.475 to 10.575GHz sub-band. ITV has bouquets at 10714 and 10758MHz and the BBC at 10773, 10788 and others; domestic satellite receivers are extremely sensitive and the RF 'front end' is wideband (typically 1.8 to 2.0GHz), I suspect the protection at some 130MHz off-channel is minimal. Provision needs to be made for compensation of viewers who loose their ability to receive satellite television, otherwise this assignment is unsuitable for use in populated areas. Is BREMA still effective?
 
Or am I talking nonsense again?
 
73, Heath.


Re: 1.5m dish at maplins

g4nns <brian-coleman@...>
 

Re-reading my last posting perhaps I should have made it clear that
my comments were in response to the statement to the effect that
most Sat TV antennas have an f/D 0f ~ .38. Which is of course true.
But most TV antenae are offset not prime focus. The VE4MA feed
should work well with the Maplin dish but the Septum feed may need a
choke.

73 Brian G4NNS

--- In ukmicrowaves@yahoogroups.com, "g4nns" <brian-coleman@...>
wrote:

BEWARE of f/D... The Quoted f/D is for the full parabola from
which
the offset dish is a small segment. For the purposes of feed
design
the offset dish will have an equivalent f/D typically in the range
0.7 to 0.9 the higher figure being more typical. The Offset dish
calculator in HDLant shows you how to calculate this. VE4MA feeds
will not be suitable and a septum feed even worse. I found the
septum feed at 3.4GHz on my 0.43f/D dish over illuminated it.
Addition of the a choke greatly improved matters but I ran out of
time to check by how much. Also there is no telling what the choke
does to circularity. For a picture See
http://myweb.tiscali.co.uk/g4nns/G4NNSEME34G.html

73 Brian G4NNS

--- In ukmicrowaves@yahoogroups.com, Mike Willis <m.j.willis@>
wrote:

This sort of dish, with a 0.4 F/D is ideal for a VE4MA feed,
which
is
easy to make for most bands up to 6cms using tin cans, and at
3cms
and
above using end mills. Efficiency should be good if you follow
the
W1GHZ
design notes and with 1.8m the feed blockage should not be too
bad
at
13cms. I would not use it at 23cms. Longer F/D offset dishes
designed
for satellite TV are also excellent but need more directional
(larger)
feed horns, which is not a problem at 6cms and above. They are
more
efficient as there is no feed blockage.

Never ever underestimate the strength of the wind on a large
dish.
If
you want to mount this dish on a tower, consider that in a storm
there
could be a sideways force of about the about the same as the
weight of a
small car.

Mike

M5FRA wrote:

On 8 Jul 2006 at 19:05, JOHN RANDALL wrote:

I am not sure which one it is as it was a quick visit to
maplins....
I did notice however, that it had a mounting ring approx 18"
dia on
the back.
The depth of the disk looked to be around 300mm.
Just looked on their web site and found this

180cm Satellite Dish Specifications:
Type Prime
Diameter 180 cm
Panels (sections) 6
Aperture Efficiency 70% min.
C - Band Gain @4.0 GHz 35.89 dB
KU - Band Gain @12.5 GHz 45.54 dB
F/D Ratio 0.38
Focus Length 682 mm
Material Steel
Finish Polyester Powder Coating
Colour Grey / Cool Grey

Price is £99

73 Colin M5FRA -- GQRP 848


Re: 1.5m dish at maplins

JOHN RANDALL <m0els@...>
 

Hallo Brian,
What type of feed will work on this maplins dish for 23cm and 3 cm ????
I wonder if they do a deeper version as well.
I am looking for a "lite" version....one which the xyl can cart way to the tips...when I am in the dog box..hi
 
73
John


g4nns wrote:
BEWARE of f/D... The Quoted f/D is for the full parabola from which
the offset dish is a small segment. For the purposes of feed design
the offset dish will have an equivalent f/D typically in the range
0.7 to 0.9 the higher figure being more typical. The Offset dish
calculator in HDLant shows you how to calculate this. VE4MA feeds
will not be suitable and a septum feed even worse. I found the
septum feed at 3.4GHz on my 0.43f/D dish over illuminated it.
Addition of the a choke greatly improved matters but I ran out of
time to check by how much. Also there is no telling what the choke
does to circularity. For a picture See
http://myweb.tiscali.co.uk/g4nns/G4NNSEME34G.html

73 Brian G4NNS

--- In ukmicrowaves@yahoogroups.com, Mike Willis ...>
wrote:
>
> This sort of dish, with a 0.4 F/D is ideal for a VE4MA feed, which
is
> easy to make for most bands up to 6cms using tin cans, and at 3cms
and
> above using end mills. Efficiency should be good if you follow the
W1GHZ
> design notes and with 1.8m the feed blockage should not be too bad
at
> 13cms. I would not use it at 23cms. Longer F/D offset dishes
designed
> for satellite TV are also excellent but need more directional
(larger)
> feed horns, which is not a problem at 6cms and above. They are
more
> efficient as there is no feed blockage.
>
> Never ever underestimate the strength of the wind on a large dish.
If
> you want to mount this dish on a tower, consider that in a storm
there
> could be a sideways force of about the about the same as the
weight of a
> small car.
>
> Mike
>
> M5FRA wrote:
> >
> > On 8 Jul 2006 at 19:05, JOHN RANDALL wrote:
> >
> > > I am not sure which one it is as it was a quick visit to
maplins....
> > > I did notice however, that it had a mounting ring approx 18"
dia on
> > the back.
> > > The depth of the disk looked to be around 300mm.
> >
> > Just looked on their web site and found this
> >
> > 180cm Satellite Dish Specifications:
> > Type Prime
> > Diameter 180 cm
> > Panels (sections) 6
> > Aperture Efficiency 70% min.
> > C - Band Gain @4.0 GHz 35.89 dB
> > KU - Band Gain @12.5 GHz 45.54 dB
> > F/D Ratio 0.38
> > Focus Length 682 mm
> > Material Steel
> > Finish Polyester Powder Coating
> > Colour Grey / Cool Grey
> >
> > Price is 99
> >
> > 73 Colin M5FRA -- GQRP 848
> >
> >
>



The all-new Yahoo! Mail goes wherever you go - free your email address from your Internet provider.


Re: 1.5m dish at maplins

g4nns <brian-coleman@...>
 

BEWARE of f/D... The Quoted f/D is for the full parabola from which
the offset dish is a small segment. For the purposes of feed design
the offset dish will have an equivalent f/D typically in the range
0.7 to 0.9 the higher figure being more typical. The Offset dish
calculator in HDLant shows you how to calculate this. VE4MA feeds
will not be suitable and a septum feed even worse. I found the
septum feed at 3.4GHz on my 0.43f/D dish over illuminated it.
Addition of the a choke greatly improved matters but I ran out of
time to check by how much. Also there is no telling what the choke
does to circularity. For a picture See
http://myweb.tiscali.co.uk/g4nns/G4NNSEME34G.html

73 Brian G4NNS

--- In ukmicrowaves@yahoogroups.com, Mike Willis <m.j.willis@...>
wrote:

This sort of dish, with a 0.4 F/D is ideal for a VE4MA feed, which
is
easy to make for most bands up to 6cms using tin cans, and at 3cms
and
above using end mills. Efficiency should be good if you follow the
W1GHZ
design notes and with 1.8m the feed blockage should not be too bad
at
13cms. I would not use it at 23cms. Longer F/D offset dishes
designed
for satellite TV are also excellent but need more directional
(larger)
feed horns, which is not a problem at 6cms and above. They are
more
efficient as there is no feed blockage.

Never ever underestimate the strength of the wind on a large dish.
If
you want to mount this dish on a tower, consider that in a storm
there
could be a sideways force of about the about the same as the
weight of a
small car.

Mike

M5FRA wrote:

On 8 Jul 2006 at 19:05, JOHN RANDALL wrote:

I am not sure which one it is as it was a quick visit to
maplins....
I did notice however, that it had a mounting ring approx 18"
dia on
the back.
The depth of the disk looked to be around 300mm.
Just looked on their web site and found this

180cm Satellite Dish Specifications:
Type Prime
Diameter 180 cm
Panels (sections) 6
Aperture Efficiency 70% min.
C - Band Gain @4.0 GHz 35.89 dB
KU - Band Gain @12.5 GHz 45.54 dB
F/D Ratio 0.38
Focus Length 682 mm
Material Steel
Finish Polyester Powder Coating
Colour Grey / Cool Grey

Price is £99

73 Colin M5FRA -- GQRP 848


Re: 1.5m dish at maplins

Mike Willis <m.j.willis@...>
 

This sort of dish, with a 0.4 F/D is ideal for a VE4MA feed, which is easy to make for most bands up to 6cms using tin cans, and at 3cms and above using end mills. Efficiency should be good if you follow the W1GHZ design notes and with 1.8m the feed blockage should not be too bad at 13cms. I would not use it at 23cms. Longer F/D offset dishes designed for satellite TV are also excellent but need more directional (larger) feed horns, which is not a problem at 6cms and above. They are more efficient as there is no feed blockage.

Never ever underestimate the strength of the wind on a large dish. If you want to mount this dish on a tower, consider that in a storm there could be a sideways force of about the about the same as the weight of a small car.

Mike

M5FRA wrote:


On 8 Jul 2006 at 19:05, JOHN RANDALL wrote:

I am not sure which one it is as it was a quick visit to maplins....
I did notice however, that it had a mounting ring approx 18" dia on
the back.
The depth of the disk looked to be around 300mm.
Just looked on their web site and found this

180cm Satellite Dish Specifications:
Type Prime
Diameter 180 cm
Panels (sections) 6
Aperture Efficiency 70% min.
C - Band Gain @4.0 GHz 35.89 dB
KU - Band Gain @12.5 GHz 45.54 dB
F/D Ratio 0.38
Focus Length 682 mm
Material Steel
Finish Polyester Powder Coating
Colour Grey / Cool Grey

Price is 99

73 Colin M5FRA -- GQRP 848


Re: 1.5m dish at maplins

M5FRA <m5fra@...>
 

On 8 Jul 2006 at 19:05, JOHN RANDALL wrote:

I am not sure which one it is as it was a quick visit to maplins....
I did notice however, that it had a mounting ring approx 18" dia on the back.
The depth of the disk looked to be around 300mm.
Just looked on their web site and found this

180cm Satellite Dish Specifications:
Type Prime
Diameter 180 cm
Panels (sections) 6
Aperture Efficiency 70% min.
C - Band Gain @4.0 GHz 35.89 dB
KU - Band Gain @12.5 GHz 45.54 dB
F/D Ratio 0.38
Focus Length 682 mm
Material Steel
Finish Polyester Powder Coating
Colour Grey / Cool Grey

Price is £99



73 Colin M5FRA -- GQRP 848


Re: sat disk at maplins

GM4OGI <gm4ogi@...>
 

John,
Being a sattv dish it is likely to have an f/D ration between 0.35 and 0.4 which seems to be the standard adopted by the Sat TV community. The OkeyDokey aka OK1DFC septum  feed is designed for such an  f//D ratio and therefore can be assumed to work satisfactorily albeit with a slight variation on efficiency of 66%. It is a moot point as to whether a variation of a few per cent is actually noticeable.
 
Any dish with an acceptable profile can be made to work with different levels of efficiency - one just needs to understand the mathematics behind dish illumination (look at the W1GHZ web site for clues), or have access to simulation tools HSS etc(sigh) - there is no substitution for actually understanding the problem in the first place. Remember that the tools will only tell you what they want.
 
The more searching question is surely whether you can point a solid dish safely in the directions your are interested in. For that you will need to understand mechanical loading properties on your mounting system under a variety of circumstances. A dish is no good if it spends 90% of its time in the Bird Path position due to high winds (although Sparrows might appreciate it). Only this risk can be assessed by an individual station...and of course there are software tools that allow you to understand the general problem.
 
 
Regards,
 
Nick - GM4OGI
 
 
 
 


Re: 1.5m dish at maplins

JOHN RANDALL <m0els@...>
 

Hi,
I am not sure which one it is as it was a quick visit to maplins....
I did notice however, that it had a mounting ring approx 18" dia on the back.
The depth of the disk looked to be around 300mm.
 
I must get a closer look next time.
Tnks Peter, yes I have all the files etc from that source.
I have a 23cm septum feed which i was going to use on my 3m solid alu dish, but its too heavy for me to move around and I am unable to find an engineering coy, who will make me a mount for it.
 
They must have some phobia about dishes I think!!!! ...hi
 
73
John

peter blair wrote:
I wonder if you and others are aware of this very useful source of info on
parabolic dishes and their feeding ...etc
http://www.w1ghz.org/antbook/contents.htm
Vy 73 Peter G3LTF
----- Original Message -----
From: "mm0kos" <mm0kos@yahoo.co.uk>
To: <ukmicrowaves@yahoogroups.com>
Sent: Saturday, July 08, 2006 6:30 PM
Subject: [ukmicrowaves] Re: 1.5m dish at maplins

Just wondering if it is the A12FB 180cm Dish from Maplin

As far as i have been told (im a rookie on 23cm also) it is best to
have the dish at least 10 times the wavelenght of the band you are
going to work or you will under illuminate the dish, i have at the
moment a 1.8m dish with a 23cm OK1DFC septum (easy to build) and to be
fitted to it.

i found a 2.4m dish at http://www.freesatuk.com/240cmdish this was the
lowest UK price i could find for them, and seems quite reasonable, if
anyone can find one cheaper please let me know as this will be my next
purchase

--- In ukmicrowaves@yahoogroups.com, "John Randall" wrote:
>
> Hallo ALL, Has anyone any comments on this disk at 99.00 each , as
to
> whether its suitable for 23cm, 3cm and if an ok1fdfc 23cm septum,
will
> illuminate it ok ??
>
> thanks
>
> John
>

Yahoo! Groups Links



Try the all-new Yahoo! Mail . "The New Version is radically easier to use" The Wall Street Journal


Re: 1.5m dish at maplins

peter blair <g3ltf@...>
 

I wonder if you and others are aware of this very useful source of info on parabolic dishes and their feeding ...etc http://www.w1ghz.org/antbook/contents.htm
Vy 73 Peter G3LTF

----- Original Message -----
From: "mm0kos" <mm0kos@yahoo.co.uk>
To: <ukmicrowaves@yahoogroups.com>
Sent: Saturday, July 08, 2006 6:30 PM
Subject: [ukmicrowaves] Re: 1.5m dish at maplins


Just wondering if it is the A12FB 180cm Dish from Maplin

As far as i have been told (im a rookie on 23cm also) it is best to
have the dish at least 10 times the wavelenght of the band you are
going to work or you will under illuminate the dish, i have at the
moment a 1.8m dish with a 23cm OK1DFC septum (easy to build) and to be
fitted to it.

i found a 2.4m dish at http://www.freesatuk.com/240cmdish this was the
lowest UK price i could find for them, and seems quite reasonable, if
anyone can find one cheaper please let me know as this will be my next
purchase

--- In ukmicrowaves@yahoogroups.com, "John Randall" <m0els@...> wrote:

Hallo ALL, Has anyone any comments on this disk at 99.00 each , as
to
whether its suitable for 23cm, 3cm and if an ok1fdfc 23cm septum,
will
illuminate it ok ??

thanks

John







Yahoo! Groups Links


Re: 1.5m dish at maplins

Chris Ruddy MM0KOS
 

Just wondering if it is the A12FB 180cm Dish from Maplin

As far as i have been told (im a rookie on 23cm also) it is best to
have the dish at least 10 times the wavelenght of the band you are
going to work or you will under illuminate the dish, i have at the
moment a 1.8m dish with a 23cm OK1DFC septum (easy to build) and to be
fitted to it.

i found a 2.4m dish at http://www.freesatuk.com/240cmdish this was the
lowest UK price i could find for them, and seems quite reasonable, if
anyone can find one cheaper please let me know as this will be my next
purchase

--- In ukmicrowaves@yahoogroups.com, "John Randall" <m0els@...> wrote:

Hallo ALL, Has anyone any comments on this disk at £99.00 each , as
to
whether its suitable for 23cm, 3cm and if an ok1fdfc 23cm septum,
will
illuminate it ok ??

thanks

John


1.5m dish at maplins

John Randall <m0els@...>
 

Hallo ALL, Has anyone any comments on this disk at £99.00 each , as to
whether its suitable for 23cm, 3cm and if an ok1fdfc 23cm septum, will
illuminate it ok ??

thanks

John


sat disk at maplins

John Randall <m0els@...>
 

Has anyone seen the 1.3m dish at maplins and have any comments on
whether I could use a ok1dfc 23cm septum feed on it.