Hal,I think you are stretching things a bit far out...Jim..
----- Original Message -----
From: "Harold Mandel" <ka1xo@juno.com>
To: "'k7rdx'" <k7rdx@charter.net>; <amps@contesting.com>
Sent: Thursday, October 19, 2006 8:07 AM
Subject: Re: [Amps] Testing amp with no air flow
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of
> Dear Jim,
>
> It's a question of economics and habit.
>
> If you feel confident in powering up ceramic
> devices without any airflow you are the one
> who footed the bill.
>
> The whole idea of the airflow scenario is that is the tube's
> normal operating environment.
>
> 8877's are about $1,000.00 these days, yes?
>
> I would think twice about powering any ceramic triode up
> without airflow going, just as seriously as I would
> think twice about immersing our tomcat in a sink full of
> warm, sudsy water for a shampoo.
>
> Hal
> W4HBM
>
>
>
> [snip]
> I just checked fil voltage on my 8877 here (No blower ) watched it ramp-up
> to 4.9vac in less than 10 secs and then pulled switch...No heat felt on
tube
> base in this short time interval...What`s the big deal unless you want to
> test with rf conduction?(I do that too but with blower running&safe
> connections) Jim K7RDX.
> [snip]
>
>
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