[Top] [All Lists]

[AMPS] HA-10 Warrior Parasitic Supressor Inductor Values

To: <>
Subject: [AMPS] HA-10 Warrior Parasitic Supressor Inductor Values
From: (2)
Date: Tue, 4 Sep 2001 19:42:54 -0700
>> It's just another kind of balanced bridge, so it should improve
>> stability at the VHF resonant frequency too, provided that phase-
>> inverting transformer is sufficiently broadband. More specifically, it
>> won't make VHF stability worse than the un-neutralized condition
>> unless the phase of the feedback has somehow reversed itself between
>> 30MHz and 80MHz (which is easy enough to ensure).
>I'd make sure I had a neutralizing system, and use a suppressor 
>like the Ameritron AL811H uses if I was refurbishing a Warrior.  
>There are two distinctly different stability problems with tubes like 
>811's and 572's.
>One is the high feedthrough capacitance that makes such tubes 
>unstable at upper HF. ...

//   I have never heard of a grounded-grid 811A or 572B oscillating at 

-  R. L. Measures, 805.386.3734,AG6K,  

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>