>At 05:03 AM 6/7/98 +0000, you wrote:
>>Hello all --
>>
>>Is it permissible to have HV applied to an 8877 during its
>>3 minute warm up period, assuming the tube is biased off?
>>Or does the tube need to have only filament voltage applied
>>for 3 minutes before applying other voltages?
>>
>>Thanks & 73, Arliss W7XU
>
>
>Not a problem, Arliss. Alpha has done it with the HV on since
>the 1970's. On all my amps, the HV comes on as soon as the step-start
>relay makes, The filament transformers are powered through a micro switch
>that looks at blower output. The three minute timer is connected to the
>primary of the filament transformer for its power, and the contacts on the
>timer inhibit the PTT line for 3 minutes.
>
>(((73)))
>
>"To do is to be".....Sartre
>"To be is to do".....Aristotle
>"To be or not to be".Shakespeare
>"Do be do be do".....Sinatra
>"Yabba dabba do......Flintstone
Phil, K5PC
"To do is to be".....Sartre
"To be is to do".....Aristotle
"To be or not to be".Shakespeare
"Do be do be do".....Sinatra
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|