ubject: Re: [time-nuts] 5061a with cold tube
I foud missing , power at beam tube ionizer .
was a diode open , now ion pump current is high .
last calibration was made 20 tears ago , maybe this one was not
operating for long time , due to a fault .
Now I will try to apply 3500 volt as the manual .
That is great news
Give it plenty of time to lower the current.
If you see it coming down it could easily take two or more weeks
If it does not you will need to do the procedure with a separate 3500 volt
power supply
good luck
You are ahead of me my tube had very very low beam current. Unusable.
O
I foud missing , power at beam tube ionizer .
was a diode open , now ion pump current is high .
last calibration was made 20 tears ago , maybe this one was not
operating for long time , due to a fault .
Now I will try to apply 3500 volt as the manual .
And I hope current go low .
I someone h
The tube is very well insulated and you barely feel that its warmer if at
all.
At least thats my experience with the one I have.
Best way is to measure the filament current but thats a messy job.
Suspect others will have better advice
On Fri, Feb 26, 2010 at 12:08 PM, Dott. Alfredo Rosati <
alfred
sorry for mistake , is 5061A
I have 5061a otion 3 - 4
I do not have beam current and 2nd arm .
ion pump current very low .
the tube is cold , it should be warm or not ? CS oven value is correct .
someone already had experience ?
the 5mhz is correct very close to exatlly frequenzy.
all help are
