[time-nuts] 75Z vs 50Z for GPS receivers
Dr Bruce Griffiths
bruce.griffiths at xtra.co.nz
Mon Jan 29 04:10:51 UTC 2007
Didier
You can always build your own 100A avalanche transistor pulser using
several Zetex FMMT413s.
Bruce
Brooke Clarke wrote:
> Hi Didier:
>
> Yes they are on eBay. The tunnel diode models have a narrower pulse
> than the later models that use something more rugged. Probably for all
> practical purposes one of the newer ones would work well and last
> better. I think the military bought boat loads of these and I've heard
> from a number of people that use them and like them a lot.
>
> Have Fun,
>
> Brooke Clarke
>
> w/Java http://www.PRC68.com
> w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
> http://www.precisionclock.com
>
>
>
> Didier Juges wrote:
>
>
>> Going over the spec for the 1502, it seems like a nice instrument. I am
>> worried about the fragility of the tunnel diode though. When my neighbor
>> AD4TK fires up his amplifier, I have measured up to 1W of his signal
>> going down my feedline (on the 80m slopper antenna)...
>>
>> Are these things on eBay?
>>
>> Didier KO4BB
>>
>> Brooke Clarke wrote:
>>
>>
>>
>>> Hi Didier:
>>>
>>> The Tek 1502 is great for doing this, especially if you have the
>>> optional strip chart recorder. It's what it was made to do.
>>> http://www.pacificsites.com/~brooke/Tek1502.shtml
>>>
>>> Have Fun,
>>>
>>> Brooke Clarke
>>>
>>>
>>>
>>>
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>>
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