[time-nuts] Maser info

Bruce Griffiths bruce.griffiths at xtra.co.nz
Thu Sep 2 08:07:02 UTC 2010


Reference for palladium-silver leak difficulty at high temperature.
http://tycho.usno.navy.mil/ptti/1988/Vol%2020_10.pdf

Bruce

Bruce Griffiths wrote:
> Higher operating temperatures force the use of nickel alloy to replace 
> the silver palladium alloy traditionally used.
> At higher operating temperatures (40c and above) its not possible to 
> turn off (without cooling it) the palladium leak.
> The Russian masers use nickel or nickel alloy instead of palladium or 
> palladium silver.
>
> Bruce
>
> Corby Dawson wrote:
>> John F.,
>>
>> The Palladium valve is also known as a palladium leak or a palladium
>> purifier. In the Maser the use is as the "leak". It would also serve to
>> purify the H2 BUT any other impurities lodge in the Palladium plug and
>> can eventually cause it to fail. Early symptoms manifest as having to
>> heat the plug to higher and higher temperatures to maintain the H2 flow.
>> When the hydrogen bottle is changed you must perform a purge routine 
>> (see
>> the manual) to allow any foreign gases to be removed. So for maximum 
>> life
>> the Hydrogen should be as pure as possible.
>> The resonator coil cannot be seen, I can see that it is a bit different
>> than the manual shows. It was upgraded at some point. I can provide a
>> picture of another masers coil.
>> The receiving tank did not heat up all. Since I was going from a higher
>> pressure tank to a mostly empty tank I don't think compression was
>> involved
>>
>>
>>
>> Robert,
>>
>> You CANNOT use oil diffusion pumps, even for the rough pumping!
>> (mechanical roughing pumps are also a no-no.) ANY contamination can
>> seriously degrade the bulb coating. This can take quite a while to show
>> up. Since tearing down the maser to replace the storage bulb is
>> definitely NON-TRIVIAL. Using a turbo pump or vacsorbs are the only
>> options. I use Vacsorbs as they are simple and quite a bit cheaper than
>> the turbo.
>>
>> Bill,
>>
>> If your serious, the disassociator splits the hydrogen molecules "H2"
>> into atoms "H" to allow maser operation. I do have an old Interocitor
>> screen I could mount on top of the Maser. It would look kinda neat!
>>
>> John M.,
>> The original oscillator was an upgrade and did not agree completely with
>> the manuals schematic. I did get an updated schematic from the vendor 
>> and
>> after much work and completely rebuilding it I still could not get it to
>> work reliably. I decided to design my own using a low power 
>> oscillator to
>> drive a power amplifier and impedance matching network. This has worked
>> very well!
>>
>> Corby Dawson
>> ____________________________________________________________
>> 1 Tip for Losing Weight
>> Cut down 2 lbs per week by using this 1 weird old tip
>> http://thirdpartyoffers.juno.com/TGL3141/4c7f52071849adf3adm04duc
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>
>
>
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