[time-nuts] 10 MHz Filters

[Chuck Forsberg WA7KGX]

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 provisions for it.  Turns out it is not 
necessary.

The real trick was locating well shielded patch cables to keep the 
Thunderbolt from
jamming WWV on 10 MHz.

On 11/27/2014 08:41 AM, Richard Solomon wrote:
> 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 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 making some type of 
>> simple ladder filter?
>>
>>
>>   In his article *Modifying Lucent RFG-M-RB Rubidium 
>> FrequencyStandard* the author used a 10MHz filter that was taken from 
>> an old 10MbitEthernet LAN board. The part number he used was 20F001N 
>> and I found them onEbay for low prices.
>>
>>
>>   Now I don’t have any access to any old ethernet LAN boardsso I’d 
>> have to build from scratch.
>>
>>
>>   Does anyone of these methods have an advantage over theothers on 
>> the new style Lucent boxes or in the making of a small 
>> distributionamplifier with good isolation?
>>
>>
>>   Regards,
>>
>>
>>   Perrier
>>
>>
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>
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-- 
      Chuck Forsberg WA7KGX   caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430