Date   

100W 2.4 GHz PA for QO-100 available on eBay

Dave G8GKQ
 

Hi All

 

There is a silent key sale of one of the Axis-NT dual 100W-capable 2.4 GHz PAs on eBay that closes today.  Ideal for TV (or SSB with a very small dish) on QO-100.

 

As I understand it, the PA is fully modified for “low power” operation (I get >60W of DATV from mine in this configuration) and just needs 0 dBm drive and 48v at about 6A. 

 

It would need the internal power supply replacing with an external 28v unit to achieve the full 100W each side.

 

https://www.ebay.co.uk/itm/Oscar100-DATV-2-4GHz-Polish-100-watt-power-amplifier-Eshail2/223648393954

 

Dave, G8GKQ


Items for Sale

john.telegraph
 

I have the following items for sale which may be of interest before going on Ebay:

 

1.3GHz System comprising of DB6NT G2 MK2 Transverter

W6PQL power amp 30w – 40w output

12v – 24v voltage doubler

Mounted in diecast box size approx. 10inches by 10 inches and 4 inches deep

Heatsink

 

Separate moulded box containing relay and pre-amp connections via N-type and bayonet connectors

Cable for IF connections supplied

Cable for power connections between the two units supplied

(Photos available)

Heavy item – collection preferred

Price: £450

 

Wimo 44 element 23cm antenna in excellent condition - £70 – photo if required - collection

 

Coaxial Relay CZX 3500 boxed new. Cost £150 – offers please (photos available)

 

Ionica 15w – 17w 3.4 Ghz amp £20 (photo available)

 

GW4DGU feed horn for use with TV satellite dishes f/D ratio range .55 - .75 – boxed – unused as new. Offers please (photos available)

 

New TV Satellite Dish 1 metre dia brand new with fittings in box  – cost £69 accept £30 – collection only

 

New TV Satellite dish 75cm £7 – collect only

 

Thanks – please respond off site

 

John M0XIG

 

 

 


Re: CQ Test

G8DQX list
 

59 here. Perhaps we're all contemplating the infinite?

On 08/09/2019 20:46, Andy G4JNT wrote:
It's been quiet on all the groups today

'jnt


CQ Test

Andy G4JNT
 

It's been quiet on all the groups today

'jnt


Re: Anyone recognise this

Wilko
 

Beryllium is likely the substrate used in load resistor for the isolator part. Magnets are used for both the isolator and circulator.

73 Wilko


Still looking

steve G1PPA
 

missed out on a full system sale so now left with a dish and a empty box HI . Looking for 10ghz equipment to fill it please e mail qrz.com
many thanks steve 


Re: Anyone recognise this

Mike Willis
 

Indeed. It amuses me that many hams don't realise the value in picking these things up just for the parts. Even worse those who do but then won't break it up because it would be a shame to damage it...

Why have complete items in your junk box that you will never use when instead you can have lots of nice components in your junk box that you will never use?

--
Mike G0MJW


Re: Anyone recognise this

Dave Brown
 

Yeah- will have to take it somewhere and do just that-no VNA here- but normally I could sweep it, just not right now, unfortunately. I too suspect it’s ex cellular but we shall see. The guy I got it from (he has many more) is convinced its microwave related but…!!. Regardless, it looks like a good source of stainless type N’s with gold centre conductor.

Dave, ZL3FJ

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Mike Willis
Sent: Saturday, September 07, 2019 20:13
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Anyone recognise this

 

The beryllium could be part of the load, there was a time of panic when that warning label went on everything. Perhaps it is all three. Why don't you put it on a VNA and find out?
--
Mike G0MJW


Re: Modded LNB

Mike Willis
 

You don't have to use an LNB for QO-100. A 10 GHz transverter will work just as well if not better with the appropriate LO. 
--
Mike G0MJW


Re: Anyone recognise this

Mike Willis
 

The beryllium could be part of the load, there was a time of panic when that warning label went on everything. Perhaps it is all three. Why don't you put it on a VNA and find out?
--
Mike G0MJW


Re: Anyone recognise this

f1ghb
 

Hello,

I saw similar units from others manufacturers at the output of GSM / DCS 1800 equipments

You are right it is a combined circulator isolator

73s Eric

Le 07/09/2019 09:42, Dave Brown a écrit :
No luck looking for info in the usual places although found photos of
similar looking devices-but not the same. Suspect it's a combined
circulator isolator but open to suggestions-and any idea of frequency range-
my sweep gear is out of action just now. Large connectors are type N- small
one on the end looks like SMB-not checked as yet.
Dave, ZL3FJ


Re: Anyone recognise this

Dave Brown
 

Yes- it does look like one - BUT- it contains both magnetic materials and beryllium…………….?

So I think not..

73

Dave, ZL3FJ

 

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Mike Willis
Sent: Saturday, September 07, 2019 19:50
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Anyone recognise this

 

Looks like a directional coupler
--
Mike G0MJW


Re: Anyone recognise this

Andy G4JNT
 

With the small SMB or SMC perhaps being a power or temperature monitor on the load part.  The bit that uses Berylium. 


Virus-free. www.avg.com


On Sat, 7 Sep 2019 at 08:50, Mike Willis <willis.mj@...> wrote:
Looks like a directional coupler
--
Mike G0MJW


Re: Anyone recognise this

Mike Willis
 

Looks like a directional coupler
--
Mike G0MJW


Anyone recognise this

Dave Brown
 

No luck looking for info in the usual places although found photos of
similar looking devices-but not the same. Suspect it's a combined
circulator isolator but open to suggestions-and any idea of frequency range-
my sweep gear is out of action just now. Large connectors are type N- small
one on the end looks like SMB-not checked as yet.
Dave, ZL3FJ


Re: Just a thought ....................

Murray Niman
 

I certainly agree with Mike - true Circular guide will lead to major instabilities in the internal mode alignment and its design is really 3D field solver territory such as by HFSS. 
Any minor distortion in the section can start twisting the mode within

That is why Eliiptic guide which effectively is deliberately distorted, but conistent, was developed (mainly for long feeder runs) - but rectangular is just so much easier

73

 Murray

PS Choked flanges (and/or O-ring groves) are an option for avoiding corrosion at sensitive joints, dissimilar metasl etc...


Re: Just a thought ....................

G3PHO - Peter
 

Sorry Ken ... my mistake...old age etc!

Peter

On 05/09/2019 08:58, Ken G3YKI wrote:
Peter, my unconventional antenna used WG16 but instead of slots had round holes, and so could be made without using machine tools.
Ken
I believe Ken, G3YKI, published a design for a copper pipe antenna for 10GHz some years ago in Scatterpoint. I can't lay my hands on it at the moment but Ken might be reading this and reply.
 


Re: Modded LNB

Paul G8KFW
 

Hi Ben all understood  yes the soldering iron needs to be smaller than when working on valve equipment and it waves about to much

Presently working on a Racal Rubidium larger than surface mount

Regards Paul


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of militaryoperator via Groups.Io
Sent: 06 September 2019 11:25
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Modded LNB

 

Hi Ben

 

My statement is for using a SDR  and software for SSB  receive on Oscar 100 as the SDR looks at the Oscar 100 bacon and calculates the offset and applies it to the receiver frequency

Lots are using injection locking for the LNB as it requires less modification

Locking The LNB  dues not necessarily mean changing the local oscillator frequency as converters are available to move 739 mhz to 2 mt

 

Any way best of luck with microwave  Regards Paul

 

 

Yes, I know Paul, I am using SDRConsole at the moment, locking it to the beacon!. 

 

My point was that if you want to use a ham rig the LNB needs locking. I have already tried twice to mod an LNB but unfortunately, my electronics skill with SMD and tiny tiny parts is lacking. I did have an offer of help that never materialised so as I said in my original posting, I have now bought one already modded and am awaiting delivery. 

 

I have the down converter waiting to be built but I am operational on O100 with the SGLab setup and pc.

 

Cheers, Ben. 

 

 

 

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK


Re: Modded LNB

militaryoperator
 

Hi Ben
 
My statement is for using a SDR  and software for SSB  receive on Oscar 100 as the SDR looks at the Oscar 100 bacon and calculates the offset and applies it to the receiver frequency
Lots are using injection locking for the LNB as it requires less modification
Locking The LNB  dues not necessarily mean changing the local oscillator frequency as converters are available to move 739 mhz to 2 mt
 
Any way best of luck with microwave  Regards Paul


Yes, I know Paul, I am using SDRConsole at the moment, locking it to the beacon!. 

My point was that if you want to use a ham rig the LNB needs locking. I have already tried twice to mod an LNB but unfortunately, my electronics skill with SMD and tiny tiny parts is lacking. I did have an offer of help that never materialised so as I said in my original posting, I have now bought one already modded and am awaiting delivery. 

I have the down converter waiting to be built but I am operational on O100 with the SGLab setup and pc.

Cheers, Ben. 
 



Re: Modded LNB

Paul G8KFW
 

Hi Ben

 

My statement is for using a SDR  and software for SSB  receive on Oscar 100 as the SDR looks at the Oscar 100 bacon and calculates the offset and applies it to the receiver frequency

Lots are using injection locking for the LNB as it requires less modification

Locking The LNB  dues not necessarily mean changing the local oscillator frequency as converters are available to move 739 mhz to 2 mt

 

Any way best of luck with microwave  Regards Paul

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of militaryoperator via Groups.Io
Sent: 06 September 2019 10:59
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Modded LNB

 

 

If you are just using it for Oscar 100 SSB  then you do not need to modify the LNB as it can all be dun by the receiver software that uses the bacon

I personally have decided to make mixers to get it onto 23 or 70 Cm

 

Regards Paul G8KFW

 

That will only lock the sdr, not the LNB. If you want to send the 739 to 2 or 70 you still need to lock the LNB.

 

Regarding my original use of this header I'm still waiting for the modded lnb to arrive. After making the downconverter I'll see if its stable enough to make a system transceive, using my FT847 probably. 

 

Ben G4BXD

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.


--
Paul Bicknell G8KFW   South Coast UK

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