[Amps] High pass filter / was GS35B tuned input

[donroden at hiwaay.net]

What about designing a high-pass filter  attached to the grid or  
cathode .... lower end somewhere around 75Mhz into a 50 ohm load to  
kill vhf/uhf parasitic gain ?

  Don WA4NPL



Quoting "Bill, W6WRT" <dezrat1242 at yahoo.com>:

> ORIGINAL MESSAGE:
>
> On Tue, 23 Feb 2010 06:19:20 -0800, "Jim Thomson" <Jim.thom at telus.net>
> wrote:
>
>> ###  a Pi net IS a LP filter.  Are you sure low Q promotes instability ??
>
> REPLY:
>
> I am sure in the case of a simple parallel resonant circuit. A pi-net,
> I don't know. Have not tried one at high Q.
>
> An 8877 is an excellent candidate for a simple parallel resonant
> circuit since its input impedance is very close to 50 ohms anyway.
> Likewise for a pair of 3-500Zs. (115 ohms for a single, 57.5 for a
> pair).
>
> 73, Bill W6WRT
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