[time-nuts] FE-5650A option 58 tuning word for 10 MHz output

[Alexander Pummer]

and if you glue a piece of non-magnetic material -- which could hold 
that connector -- it could be even some plastic, to the surface of the  
mu-metal , you do not need to worry about disturbing the magnetic conditions

73

KJ6UHN Alex


On 1/2/2017 3:44 PM, Attila Kinali wrote:
> On Tue, 03 Jan 2017 11:02:54 +1300
> Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
>
>> Maybe a waterjet cutter would  imapct less on the shielding properties of
>> tthe mumetal?
> I doubt it. mu-metal is pretty sensitive to vibration as well and a
> waterjet creates plenty of that. But anealing mu-metal is pretty simple,
> if one has enough space to build a furnace in the backyard. All you have
> to do is find a wall material that can withstand the 1000-1500°C annealing
> temperature and which can be flooded with hydrogen is enough.
>
> Flooding the furnace with hydrogen is not dangerous, as long as the
> interior is completely flooded (no oxygen) and the hydrogen leaks
> out at well controlled points, where it can burn off. There are
> descriptions how to do that out there. The only problem is that you need
> enough space around the furnace for the hydrogen flames to not cause any
> trouble. Being outside also helps to prevent hydrogen build-ups on the
> ceiling while initially flooding the furnace or shuting it off.
>
>
> 			Attila Kinali