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Re: Max anode voltage?

Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

Hi Ed,

No its not sufficient. Its a very wimpy peak power compared to the average
SG coil. I was hoping the 5kV was the power supply voltage and hence I could
swing 4.4kV to a peak anode voltage of 9.4kV.
If it is a vacuum issue from what I have read I assume the effect of
exceeding the peak voltage is the possibility of internal arc and/or ion
bombardment of cathode.
I thing the former can be limited with some series R in the anode and the
later may not be a problem because of the very limited operating time and
the fact it a directly heated carburized cathode

Robert (R. A.) Jones
A1 Accounting, Inc., Fl
407 649 6400
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, May 15, 2006 8:44 PM
Subject: Re: Max anode voltage?

> Original poster: Ed Phillips <evp@xxxxxxxxxxx>
> Tesla list wrote:
> >Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>
> >
> >Hi all, in particular tube experts (yes I am talking the old big metal
> >glass/ceramic things with heaters)
> >
> >Anybody know what the max anode voltage rating in a triode spec means?
> >specifically the GU5B
> >i.e. does it mean the maximum supply voltage or the maximum peak voltage
> >that is allowed on the anode.
> >What may happen if the maximum peak anode voltage is exceeded, assuming
> >maximum anode dissipation is not exceeded.
> >Thanks in advance.
> >
> >
> >Robert (R. A.) Jones
> >A1 Accounting, Inc., Fl
> >407 649 6400
>     Try:  http://www.mif.pg.gda.pl/homepages/frank/sheets/018/g/GU5B.pdf
> for a bilingual data sheet.
>     Exceeding the maximum anode voltage may not do much if the vacuum
> is good, but this tube is rated at 5 kV max below 30 MHz and I would
> think that would be sufficent for anything you have in mind.
> Ed