Re: [time-nuts] 10 MHz Filters

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,

Re: [time-nuts] 10 MHz Filters

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.

Re: [time-nuts] 10 MHz Filters

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

[time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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.

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

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: [time-nuts] 10 MHz Filters List

Re: [time-nuts] 10 MHz Filters

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

Re: [time-nuts] 10 MHz Filters

-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 Filters List, I have seen on the net a 10 MHz filter using 10.7 IFtransformers but have

Re: [time-nuts] 10 MHz Filters

, November 26, 2014 8:08 PM To: time-nuts Subject: [time-nuts] 10 MHz Filters 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

Re: [time-nuts] 10 MHz Filters

] 10 MHz Filters 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. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe