I can concure with that.
If Eimac says it's not recommended it means NO
Alex 3Z5KS
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Don Kessler
Sent: Monday, September 07, 2009 8:09 PM
To: amps@contesting.com
Subject: Re: [Amps] 3CX800 and blower
On Monday 07 September 2009 10:26:42 am David J Windisch wrote:
> Does a 3CX800A7 require airflow any time the filament is lit, like, say,
> 3-500Z glass tubes with tender seals and 70-watt filaments?
>
> I'm thinking of leaving the (unobtanium) blower turned off, to lower wear
> and tear, until I need the power.
>
> Yep, I'm aware of the potential hazard of a senior moment: I have in mind
a
> no-blower-no-operate interlock scheme.
>
> Tia & brgds,
> Dave, W8FGX
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
According to the data sheet for this tube and from talking to the folks at
CPI
(Eimac) directly, forced air cooling is absolutely mandatory whenever
current
is applied to the filament.
I know from personal experience that a few minutes of filament heating
without
forced air cooling makes the tube very hot to the touch. It is easy to
believe that the seals would overheat if this condition were permitted to
continue for greater lengths of time.
I would much prefer to replacement worn out blower than to replace the
tube(s).
73,
Don
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|