Charles is absolutely correct this is what I have seen in these large
splitters.
I have a really nice one that you can take the cover off and look. Lots of
screws.
Regards
Paul
WB8TSL
On Thu, Jan 8, 2015 at 5:03 AM, Charles Steinmetz
wrote:
> Dave wrote:
>
> Yes, but I was aware of this, and th
On 8 January 2015 at 10:03, Charles Steinmetz wrote:
> Dave wrote:
>
>> Yes, but I was aware of this, and that's why I got two different isolation
>> figures.
>
>
> What I was pointing out is that there will be *4* different isolation
> figures from any one output port, not just two. The lowest w
Dave wrote:
Yes, but I was aware of this, and that's why I got two different isolation
figures.
What I was pointing out is that there will be *4* different isolation
figures from any one output port, not just two. The lowest will be
to the one electrically adjacent output, next (a bit highe
On 7 Jan 2015 01:24, "Charles Steinmetz" wrote:
>
> Dave wrote:
>
>> At 50 MHz, the loss from the common port is 12.8 dB, and the isolation
>> between two ports sets of ports is either 38 or 48 dB
>
>
> To get the worst-case output-to-output isolation, you need to test two
output ports that are el
Just to say, the comment on the graphs that the VNA covers 50 MHz to 20
MHz, is obviously wrong. My 8720D covers 50 MHz to 20 GHz.
I do have another couple of VNAs here that cover 10 MHz. I will do some
more measurements, with a more suitable VNA when I have both splitters here
and some time for
Dave wrote:
At 50 MHz, the loss from the common port is 12.8 dB, and the isolation
between two ports sets of ports is either 38 or 48 dB
To get the worst-case output-to-output isolation, you need to test
two output ports that are electrically adjacent (i.e., that share the
same last 2:1 spli
On 4 January 2015 at 02:37, Bob Camp wrote:
> Hi
>
>> On Jan 3, 2015, at 6:09 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
>> wrote:
>>
>> I was looking to make a 10 MHz distribution amp to feed test equipment with
>> the output of a GPSDO.
>>
>> I see this
>>
>> http://m.ebay.com/itm/20124430235
ate: Sun, 4 Jan 2015 08:29:34 -0500
Subject: Re: [time-nuts] Any reason not to use one power amplifier and
splitter for distribution amplifier?
A cheap and dirty equivalent of a pass thru terminator that I use is a BNC t
connector with a 52 ohm bnc terminator. I guess you could use a CATV 75 oh
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Any reason not to use one power amplifier and
> splitter for distribution amplifier?
>
> Hi
>
> Any time you run into terms like “low noise” it pays to think about what that
> means to you and your system. A qui
>
>
>> From: bill.ric...@verizon.net
>> To: time-nuts@febo.com
>> Date: Sun, 4 Jan 2015 08:29:34 -0500
>> Subject: Re: [time-nuts] Any reason not to use one power amplifier and
>> splitter for distribution amplifier?
>>
>> A cheap and dirty
of very good products out there on the
surplus market selling for a small fraction of their original cost.
Cheers;
Thomas Knox
> From: bill.ric...@verizon.net
> To: time-nuts@febo.com
> Date: Sun, 4 Jan 2015 08:29:34 -0500
> Subject: Re: [time-nuts] Any reason not to use one power
original cost.
Cheers;
Thomas Knox
> From: bill.ric...@verizon.net
> To: time-nuts@febo.com
> Date: Sun, 4 Jan 2015 08:29:34 -0500
> Subject: Re: [time-nuts] Any reason not to use one power amplifier and
> splitter for distribution amplifier?
>
> A cheap and dirty
A cheap and dirty equivalent of a pass thru terminator that I use is a BNC t
connector with a 52 ohm bnc terminator. I guess you could use a CATV 75 ohm
F type with an adapter. Maybe that combination would produce too much
garbage.
73,
Bill, WA2DVU
Cape May
---
This email has been checked for
Bruce wrote:
A 10nF cap connected to the emitter winding [instead of the collector]
avoids capacitively coupling collector power supply noise to the output
(assuming that the collector supply isnt ground.).
Good point. I take pains with power supply design and very rarely
have problems with
Hi
> On Jan 3, 2015, at 10:37 PM, paul swed wrote:
>
> Dave
> I am sure there will be many answers. But yes indeed it will work fine. All
> of the outputs should have the same delay also and that may be useful.
>
> There really are the two approaches. The big power amp thats a 1/2 Watt you
> ar
On Sunday, January 04, 2015 03:39:48 AM Charles Steinmetz wrote:
> Dave wrote:
> >I was looking to make a 10 MHz distribution amp to feed test
equipment with
> >the output of a GPSDO.
> >
> > * * *
> >
> >16-way Minicircuits splitter on eBay which I got for $40. I guess the loss
> >is aro
Dave wrote:
I was looking to make a 10 MHz distribution amp to feed test equipment with
the output of a GPSDO.
* * *
16-way Minicircuits splitter on eBay which I got for $40. I guess the loss
is around 12 dB.
Is there any reason not to just drive that with 22 dBm or so of power to
get
Almost all frequency counters have an internal source which is a potential
means of injection locking an external reference if the isolation between the
internal source and the external source is inadequate. High impedance taps on a
single terminated line ensure that the isolation between such i
Friends in Time,
There's been a large amount of discussion about distribution amps on
this list.
People may be using them just because that's what's done. So I ask you:
What are we trying to isolate? The destination devices do not generate
an interfering signal, n'est ce pas?
The receiving devic
My 2 cents. I just repurposed an RGB video distribution amp for use
with a rubidium. The board has three EL2070 (200 MHz BW) amps, each
one feeds several BNC jacks for RGB output. I only need three
separate, isolated outputs, so I am feeding the rubidium into all
three EL2070's and only taking one
Dave
I am sure there will be many answers. But yes indeed it will work fine. All
of the outputs should have the same delay also and that may be useful.
There really are the two approaches. The big power amp thats a 1/2 Watt you
are talking and the many small amps as in the distributed mode.
Whats
Hi
> On Jan 3, 2015, at 6:09 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
> wrote:
>
> I was looking to make a 10 MHz distribution amp to feed test equipment with
> the output of a GPSDO.
>
> I see this
>
> http://m.ebay.com/itm/201244302355
>
> 16-way Minicircuits splitter on eBay which I go
I was looking to make a 10 MHz distribution amp to feed test equipment with
the output of a GPSDO.
I see this
http://m.ebay.com/itm/201244302355
16-way Minicircuits splitter on eBay which I got for $40. I guess the loss
is around 12 dB.
I actually bought another for $35 which was similar but o
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