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[Amps] Re: [Amps] suppressors

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Subject: [Amps] Re: [Amps] suppressors
From: (2)
Date: Mon, 5 Aug 2002 15:08:39 -0700
>>  Here is a point I've never seen discussed , anywhere, and I've often
>> wondered about it !!
>>    what reason is there for a specific value of resistor in a
>> parasitic suppressor. ?? I have seen 50 ohms, 100 ohms, and two 50 ohm
>s in
>> parallel.. ! Is there a valid reason for using any particular value ??
> over
>> the years it seems that 50 ohms was the usual value, but today I found
> in
>> the amp I'm working on , a 100 ohm, two watt unit.
>>  Any answers out there ??? thanks !
>>  carl / kz5ca
>A politically correct answer would say that each amplifier needs its 
>own suppressor, most likely you find in amplifiers all sort of 
>suppressors or no suppressor at all.
**  The AL-1500 (1, 8877) is the only HF amplifier I know of that has no 
vhf suppressor. [Figure 24.1 on my Web site]

>Often suppressors are unavoidable, but not only an effective solution 
>exists, there are more, so a cut and try products (something that works 
>with something that is available) is used with old glass tubes or 
>anyway with tubes that have big feedback.
>More than often suppressors are instead "included" as something that 
>people is accustomed to find out but not really needed, the amplifier 
>would be inherently stable at the frequency in use, with or without 

**   In HF g-g, the problem is not stability at the frequency in use, 
it's stability at the unavoidable vhf anode-resonance between the tube 
and the Tune-C. 
cheers, Mauri

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,  

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