[R-390] R-390 Digest, Vol 105, Issue 9

Sun Jan 13 14:53:55 EST 2013

The obvious reason not to use passive is the degradation in Noise Figure due
to the splitting loss. In situations where ambient noise is significantly
above the receivers front end noise(NF), then passives would be practical.
It clearly is difficult to build a wideband amplifier that is superior to
the TRF front of the 390s, in terms of IM/Distortion performance.

Lester B Veenstra  MØYCM K1YCM W8YCM
lester at veenstras.com

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-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Bill - KK4XO
Sent: Sunday, January 13, 2013 2:33 PM
To: 'Edward'; r-390 at mailman.qth.net
Subject: Re: [R-390] R-390 Digest, Vol 105, Issue 9

Ed brings up a good subject.
I've always been under the impression that passive multi-couplers were
better in order to maintain a good signal-to-noise ratio.  Can anyone on the
list who has compared both types side-by-side provide some input on
performance of active vs passive?
Thanks,
Bill- KK4XO

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Edward
Sent: Saturday, January 12, 2013 1:27 AM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] R-390 Digest, Vol 105, Issue 9

Why passive?  I have the active Stridsberg 8 port and the noise figure is
very low.  Highly recommend it.  

73
Ed

Sent from my iPhone

On Jan 11, 2013, at 20:00, r-390-request at mailman.qth.net wrote:

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> Today's Topics:
> 
>   1. Multicouplers (Robert Newberry)
>   2. Re: Multicouplers (Lizeth Norman)
>   3. Re: Multicouplers (KK4XO Gmail)
>   4. Re: Multicouplers (KK4XO Gmail)
>   5. Re: Multicouplers (Doug Massey)
>   6. Re: Multicouplers (Robert Newberry)
>   7. Re: Multicouplers (Charles P. Steinmetz)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 10 Jan 2013 20:58:59 -0500
> From: Robert Newberry <N1XBM at amsat.org>
> To: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
> Subject: [R-390] Multicouplers
> Message-ID:
>    
> <CAM09xEayp9X9RHUUNDuWKezrF3xz0uSWJ4mwQQTj5PZDhHd0kw at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> I've been reading up on multicouplers for my HF receivers. I have been 
> reading on the net about homebrew designs and commercial. Also passive 
> and active.
> 
> I would be interested in 50 ohm and probably homebrew.
> 
> What are you folks using?
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Fri, 11 Jan 2013 00:59:11 -0500
> From: Lizeth Norman <normanlizeth at gmail.com>
> To: Robert Newberry <N1XBM at amsat.org>
> Cc: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
> Subject: Re: [R-390] Multicouplers
> Message-ID:
>    
> <CAJUhCTOj1Oxx9LdRbNyiU_AcQvd-Sqav-So9HeLTD9VzPvF5BQ at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> Robert,
> w1zr multicoupler.
> Was available as a kit. Great stuff.
> 73 es see you on the birds
> Norm n3ykf
> 
> On Thu, Jan 10, 2013 at 8:58 PM, Robert Newberry <N1XBM at amsat.org> wrote:
>> I've been reading up on multicouplers for my HF receivers. I have 
>> been reading on the net about homebrew designs and commercial. Also 
>> passive and active.
>> 
>> I would be interested in 50 ohm and probably homebrew.
>> 
>> What are you folks using?
>> ______________________________________________________________
>> R-390 mailing list
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>> This list hosted by: http://www.qsl.net Please help support this 
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> 
> ------------------------------
> 
> Message: 3
> Date: Fri, 11 Jan 2013 04:12:05 -0500
> From: "KK4XO Gmail" <kk4xo.bill at gmail.com>
> To: "Lizeth Norman" <normanlizeth at gmail.com>,    "Robert Newberry"
>    <N1XBM at amsat.org>
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Multicouplers
> Message-ID: <C0D1A8423567448F8F03B6DA906D1C4E at 82H8GK1DELL546PC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>    reply-type=original
> 
> I think you mean the W8ZR Multicoupler Kit - available here:
> http://www.w8zr.net/multicontroller/index.htm
> 73 - Bill, KK4XO
> 
> -----Original Message-----
> From: Lizeth Norman
> Sent: Friday, January 11, 2013 12:59 AM
> To: Robert Newberry
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Multicouplers
> 
> Robert,
> w1zr multicoupler.
> Was available as a kit. Great stuff.
> 73 es see you on the birds
> Norm n3ykf
> 
> On Thu, Jan 10, 2013 at 8:58 PM, Robert Newberry <N1XBM at amsat.org> wrote:
>> I've been reading up on multicouplers for my HF receivers. I have 
>> been reading on the net about homebrew designs and commercial. Also 
>> passive and active.
>> 
>> I would be interested in 50 ohm and probably homebrew.
>> 
>> What are you folks using?
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net Please help support this 
>> email list: http://www.qsl.net/donate.html
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> 
> ------------------------------
> 
> Message: 4
> Date: Fri, 11 Jan 2013 08:21:49 -0500
> From: "KK4XO Gmail" <kk4xo.bill at gmail.com>
> To: "Lizeth Norman" <normanlizeth at gmail.com>,    "Robert Newberry"
>    <N1XBM at amsat.org>
> Cc: r-390 at mailman.qth.net
> Subject: Re: [R-390] Multicouplers
> Message-ID: <F47A92DC631A465A80CD2E81C619603C at 82H8GK1DELL546PC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>    reply-type=response
> 
> Actually W1ZR designs/makes some nice projects like W8ZR did, but no 
> multicouplers.
> Notice that I said "did".....I looked further at the W8ZR web site I 
> listed and the multicoupler project boards are no longer available so 
> that kind of brings us back to square one on this thread.
> I'm using one of the passive Stridsberg multicouplers but my 
> requirements are not as demanding as others on the list.  Stridsberg 
> also makes an active multicoupler which is better and also more expensive.
Both are listed here:
> http://www.stridsberg.com/prod01.htm
> I'd like to hear more about what everyone else recommends and/or is using.
> 73 - Bill, KK4XO
> 
> 
> 
> ------------------------------
> 
> Message: 5
> Date: Fri, 11 Jan 2013 10:27:03 -0500
> From: Doug Massey <dougmassey at masseyradiolabs.com>
> To: KK4XO Gmail <kk4xo.bill at gmail.com>
> Cc: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
> Subject: Re: [R-390] Multicouplers
> Message-ID: <750E88C0-5148-430B-9796-39392A58503E at masseyradiolabs.com>
> Content-Type: text/plain;    charset=us-ascii
> 
> They are excellent.  I have the active model 4 output unit
> 
> Doug
> N4ZZT
> 
> Doug Massey
> Massey Radio Labs
> Johnston SC
> www.masseyradiolabs.com
> 
> Sent from my iPhone
> 
> On Jan 11, 2013, at 8:21 AM, "KK4XO Gmail" <kk4xo.bill at gmail.com> wrote:
> 
>> Actually W1ZR designs/makes some nice projects like W8ZR did, but no
multicouplers.
>> Notice that I said "did".....I looked further at the W8ZR web site I
listed and the multicoupler project boards are no longer available so that
kind of brings us back to square one on this thread.
>> I'm using one of the passive Stridsberg multicouplers but my 
>> requirements
are not as demanding as others on the list.  Stridsberg also makes an active
multicoupler which is better and also more expensive.  Both are listed here:
>> http://www.stridsberg.com/prod01.htm
>> I'd like to hear more about what everyone else recommends and/or is
using.
>> 73 - Bill, KK4XO
>> 
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
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>> This list hosted by: http://www.qsl.net Please help support this 
>> email list: http://www.qsl.net/donate.html
> 
> 
> ------------------------------
> 
> Message: 6
> Date: Fri, 11 Jan 2013 10:45:39 -0500
> From: Robert Newberry <N1XBM at amsat.org>
> To: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
> Subject: Re: [R-390] Multicouplers
> Message-ID:
>    
> <CAM09xEYXNG9wPJWcJEuEmdx8rP-GcMCxjoZ=JJjvTsLM+Ees+Q at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> I think I'm leaning towards the stridsberg passive. The price is good 
> and people give them good reviews.
> 
> 
> ------------------------------
> 
> Message: 7
> Date: Fri, 11 Jan 2013 11:53:08 -0500
> From: "Charles P. Steinmetz" <charles_steinmetz at lavabit.com>
> To: R-390 at mailman.qth.net
> Subject: Re: [R-390] Multicouplers
> Message-ID: <20130111165316.CD96811BCFF at karen.lavabit.com>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
> 
> Robert wrote:
> 
>> I think I'm leaning towards the stridsberg passive. The price is good 
>> and people give them good reviews.
> 
> If you go passive, you may also want to consider the passive splitters 
> from Mini-Circuits.  IME, they have better isolation and amplitude 
> matching than the Stridsberg splitters, and can handle higher input 
> levels with less distortion.  They are also less expensive.
> 
> ZFSC-2-6  (two outputs, 2 kHz to 60 MHz, $51.95)
> ZMSC-4-1 (four outputs, 100 kHz to 200 MHz, $66.95)
> ZFSC-8-1  (eight outputs, 500 kHz to 175 MHz, $99.95)
> 
> Best regards,
> 
> Charles
> 
> 
> 
> 
> 
> 
> ------------------------------
> 
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> 
> End of R-390 Digest, Vol 105, Issue 9
> *************************************
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