No problem, always glad to be of help to those in need.
73 es HH, Dick, W1KSZ
On 12/2/2014 2:27 PM, John Ackermann N8UR wrote:
Thanks for the kind words, Dick. :-)
However, a couple of notes on the TADD-1 bandpass filter:
1. I *don't* recommend installing it unless there is a good reason.
Thanks for the kind words, Dick. :-)
However, a couple of notes on the TADD-1 bandpass filter:
1. I *don't* recommend installing it unless there is a good reason. As
others have noted, any tuned circuit is a thermometer and will degrade
ADEV performance. Other than the original test unit, I
John wrote:
For the most part, you don't want transformer isolation unless you
plan on using balanced lines. There are worse things than ground
loops out there, and lifting a coax shield away from ground is a
great way to find all of them.
You certainly need the shield grounded at RF, but y
es. There are worse things than ground loops out there,
>>> and lifting a coax shield away from ground is a great way to find all of
>>> them.
>>>
>>> You definitely don't want 10.7 MHz IF transformers, unless you are just
>>> trying to build
ansformers, unless you are just
>> trying to build a thermometer.
>>
>> -- john, KE5FX
>> Miles Design LLC
>>
>>> -Original Message-
>>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Perry
>>> Sandeen via time
> -- john, KE5FX
> Miles Design LLC
>
>> -Original Message-
>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Perry
>> Sandeen via time-nuts
>> Sent: Wednesday, November 26, 2014 8:08 PM
>> To: time-nuts
>> Subject: [time-nuts] 10 MHz Fil
Hi
Even if you are running 50 ohm loads, with 4 outputs, a power splitter is a
very real solution. You will be down 6 db on each output. If you start with +13
you will have +7 dbm. Your target devices probably are happy as can be with
anything over +3 dbm.
-
If you are
ss you are just trying
to build a thermometer.
-- john, KE5FX
Miles Design LLC
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Perry
> Sandeen via time-nuts
> Sent: Wednesday, November 26, 2014 8:08 PM
> To: time-nuts
> Subject
I have 4 or 5 devices that use the 10 MHz from my Trimble Thunderbolt.
All but one have high impedance 10 MHz inputs, so the Thunderbolt
can drive the lot without any amplifier.
When I put together my Thunderbolt, power supply, and filter I assumed I
would
need a distribution amp ans made provis
Hi
We are talking about many different parts here and calling them all
“transformers”.
The parts from an Ethernet line card are broadband devices used primarily for
isolation. The 10.7 MHz IF transformers are designed for use in a filter. The
first could be used to break a ground loop on a cab
Hi
Just as you can “move” 455 KHz IF transformers down with a little padding, you
can do the same thing with 10.7 MHz IF cans. They may or may not tune to 10
MHz. If you get some that don’t tune, it’s just a cap to bump them down.
The gotcha to any filter in a distribution system is Q. High Q
Any suggestions as to which chips, or links to any documentation?
Thanks,
Jim
On 11/27/2014 11:36 AM, Chris Albertson wrote:
3) it is really easy to build a temperature controller using a $2 8-pin uP
and a few lines of code. The 8-pin uP will have a few analog inputs and
outputs and even pins l
Perry,
Just three days ago, I posted about my using transformers from
Ethernet cards. I also summarized the results of some measurements
using the spectrum analyzer. There was only one response, so it seems
that what I posted was widely ignored.
Dave M - good find on Electronic Goldmine.
Joe Gr
If you want to see how to really do it right, check out this
distribution Amp
on the TAPR site.
https://www.tapr.org/kits_tadd-1.html
73, Dick, W1KSZ
On 11/26/2014 9:08 PM, Perry Sandeen via time-nuts wrote:
List,
I have seen on the net a 10 MHz filter using 10.7 IFtransformers but have
I'm not much further along then you but I did find a few things...
1) You can buy/salvage good quality 10.0 MHz transformers form networking
equipment designed for 10BaseT Ethernet. These are designed for galvanic
isolation and are used in old 10baseT routers and switches. Newer Ethernet
works a
Electronic Goldmine has some Pulse Engineering LAN transformers (same as
those used on many LAN boards) on clearance at $1.00 each.
http://www.goldmine-elec-products.com/prodinfo.asp?number=G17078
Datasheet is at http://www.datasheet4u.com/download_new.php?id=541958
Quite cheap, in my opinion.
List,
I have seen on the net a 10 MHz filter using 10.7 IFtransformers but have no
idea how well they would work for isolation with thenew style Lucent boxes.
Thoughts?
On Ebay venders are offering 10 MHz crystals for almostnothing if you buy 30.
My question wouldthese be good for ma
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