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OT: 2 port 50 ohm RX splitters

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alsopb

OT: 2 port 50 ohm RX splitters

A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use.

Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal.

Of course the K3 has one built in to route the main RX antenna to both the main and sub rx.

73 de Brian/K3KO

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Alan Bloom

Re: OT: 2 port 50 ohm RX splitters

More information is needed: Do you want a packaged device with
connectors? What type of connectors? Do you want a simple resistive
splitter or a hybrid with good port isolation? What frequency range?

Mini-Circuits has a broad range of different types of splitters and they
are happy to sell in single quantities:

http://www.minicircuits.com

Alan N1AL

On 12/31/2013 09:04 PM, [hidden email] wrote:

> A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use.
>
> Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal.
>
> Of course the K3 has one built in to route the main RX antenna to both the main and sub rx.
>
> 73 de Brian/K3KO
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

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Arie Kleingeld PA3A-2

Re: OT: 2 port 50 ohm RX splitters

HNY all,

A receive-splitter is a thing that is easily built guys.

Look on W8JI's site and search for combiner or splitter.
I constructed a few magic T splitters myself and they work just fine.

73

Arie PA3A

>
> On 12/31/2013 09:04 PM, [hidden email] wrote:
>> A while back there were some postings on recommended commercial 50
>> ohm two port splitters for receiver use.
>>
>>
>> 73 de Brian/K3KO
>>

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alsopb

Re: OT: 2 port 50 ohm RX splitters ---TNX

In reply to this post by alsopb

Thanks guys. Looks like the W8JI design is easiest to build.
Mouser has the binocular cores needed.

73 de Brian/K3KO
---- [hidden email] wrote:
> A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use.
>
> Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal.
>
> Of course the K3 has one built in to route the main RX antenna to both the main and sub rx.
>
> 73 de Brian/K3KO

______________________________________________________________
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Joe Subich, W4TV-4

Re: OT: 2 port 50 ohm RX splitters ---TNX

Jack Smith has a kit - everything except case and connectors:
http://cliftonlaboratories.com/z10050a_3_db_hybrid.htm

73,

... Joe, W4TV

On 1/1/2014 9:15 AM, [hidden email] wrote:

> Thanks guys. Looks like the W8JI design is easiest to build.
> Mouser has the binocular cores needed.
>
> 73 de Brian/K3KO
> ---- [hidden email] wrote:
>> A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use.
>>
>> Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal.
>>
>> Of course the K3 has one built in to route the main RX antenna to both the main and sub rx.
>>
>> 73 de Brian/K3KO
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Jack Smith-6

Re: OT: 2 port 50 ohm RX splitters ---TNX

I would note that if you intend to use combiners with signal generators
for intermodulation measurements care has to be taken with core
selection if high performance amplifiers are to be evaluated.

After a great deal of experimentation, the limit of my 2nd and 3rd order
IMD measurement capability is > +100 dBm (2nd order) and > +55 dBm (3rd
order) but that required evaluating a half dozen or more 3 dB combiners
and quite a few other components as well. The best of my Norton
amplifiers press against these limits.

Some discussion and measured data for various 3 and 6 dB combiners at my
web site:
http://www.cliftonlaboratories.com/6_db_hybrid_combiner.htm
http://www.cliftonlaboratories.com/Documents/Notes%20on%20Building%20a%20Z10050A.pdf

I've modified my test equipment setup since the first page link was
written - presently use a pair of HP 8657A signal generators and an HP
8568B spectrum analyzer. But the ZHL-3A amplifiers remain in use and
are essential.

Jack K8ZOA

On 1/1/2014 9:35 AM, Joe Subich, W4TV wrote:

>
> Jack Smith has a kit - everything except case and connectors:
> http://cliftonlaboratories.com/z10050a_3_db_hybrid.htm
>
> 73,
>
> ... Joe, W4TV
>
>
> On 1/1/2014 9:15 AM, [hidden email] wrote:
>> Thanks guys. Looks like the W8JI design is easiest to build.
>> Mouser has the binocular cores needed.
>>
>> 73 de Brian/K3KO
>> ---- [hidden email] wrote:
>>> A while back there were some postings on recommended commercial 50
>>> ohm two port splitters for receiver use.
>>>
>>> Can't find the postings. Cheaper is better. Loss for my
>>> application is relatively unimportant since they will be signal
>>> generator driven and followed by step attenuators. Simple HB designs
>>> may also be of interest. Kits would be ideal.
>>>
>>> Of course the K3 has one built in to route the main RX antenna to
>>> both the main and sub rx.
>>>
>>> 73 de Brian/K3KO
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

David Anderson-2

Re: OT: 2 port 50 ohm RX splitters ---TNX

In reply to this post by alsopb

I Purchased 5 used Mini Circuits 3dB splitters from China for about $28 on eBay including shipping from half way round the world.
5-500 MHZ with SMA connectors
Model ZFSC-2-1

Lots of uses for them, splitting 10MHz standards, dual receivers on single antenna etc.

I did previously build a 3dB hybrid from a design in an ARRL handbook many years ago when I wanted to do some 2 tone testing on a receive converter, but with the availability of good quality surplus nowadays it isn't worth the time and effort!

David Anderson GM4JJJ

> On 1 Jan 2014, at 14:15, <[hidden email]> wrote:
>
> Thanks guys. Looks like the W8JI design is easiest to build.
> Mouser has the binocular cores needed.
>
> 73 de Brian/K3KO
> ---- [hidden email] wrote:
>> A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use.
>>
>> Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal.
>>
>> Of course the K3 has one built in to route the main RX antenna to both the main and sub rx.
>>
>> 73 de Brian/K3KO
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html