[AMPS] RF Choke

[measures]

>
>My english is not enough good to perceive (for sure) if some sentence has a
>sarcastic vein or not, but I don't care.
>If grid-ground reactance is not low enough to be neglectable at frequency in
>use, adding the proper capacitance in parallel to the existing capacitors
>can fixes the problem.

good point.  It is my opinion that this thread contains several 
technoblathers.  

>If grid-ground reactance is already low enough to be neglectable at
>frequency in use, adding other capacitors in parallel to the existing ones
>doesn't enhance anything in practice.
>Like it or not, also shorting (with a low inductance) strap/wire when a grid
>ground circuit has a neglectable reactance doesn't increase the gain.

the real world

>Again (this was my point before the twist and stretch), unless implementing
>some grid trip circuit or grid fuse, it's potentially dangerous for tubes in
>SB220 and TL922 the replacement of the grid circuit with a direct ground
>connection.
>
Semi-true.  With directly grounded grids, a grid fuse can be placed in 
series with the grid meter shunt.  

ciao, Mauri 
>
>
>
>----- Original Message -----
>From: "Tom Rauch" <w8ji@contesting.com>
>To: <i4jmy@iol.it>; "Jeff Wolf" <da_kang@hotmail.com>
>Cc: <amps@contesting.com>
>Sent: Saturday, November 04, 2000 2:05 AM
>Subject: Re: [AMPS] RF Choke
>
>
>
>> 1.) If the capacitors make no difference in gain, as Mauri claims,
>> then they don't serve the function claimed by proponents of using
>> them......and so they can be removed with no ill effects. There is no
>> reason to leave them in.
>>
>> 2.) If the capacitors act like they do in all the amps I've seen (that
>> has been dozens of amps), then they need removed to help
>> performance.
>>
>> Looks like either way the best solution is to get rid of them,
>> because they either do nothing at all or they hurt the system.
>>
>>
>> 73, Tom W8JI
>> w8ji@contesting.com
>
>
>
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>


-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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