ORIGINAL MESSAGE:
On Tue, 18 May 2010 14:27:43 -0400, Roger <sub1@rogerhalstead.com>
wrote:
> but like Carl I'd be
>concerned about why the heater opened.
>Even pulls are not free and the 8877 is an expensive tube so I'd want
>some insurance that the replacement would not be going bad any time soon.
REPLY:
The 8877 heater is very sensitive to over voltage. I was doing some
bench testing once and accidentally applied 6.3 volts instead of 5 and
the heater blew immediately.
A very expensive mistake. Live and learn.
73, Bill W6WRT
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|