[Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke

Tony King - W4ZT amps at w4zt.com
Fri Mar 4 11:26:14 EST 2005


Because the GS-35B has the cathode internally connected to one side of 
the filament.  73, Tony W4ZT

Tomm Aldridge wrote:
> Then why do all the GS35B designs have filament chokes?
> 
> Will Matney wrote:
> 
>> 
>>  
>>Yup, your right, my faux pas.
>> 
>>Should be any time a filament choke is used is on a directly heated cathode.
>> 
>>Will 
>> 
>>-------Original Message-------
>> 
>>From: Japerlick at aol.com
>>Date: 03/04/05 09:59:56
>>To: craxd1 at ezwv.com
>>Subject: Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke
>> 
>>In a message dated 3/4/2005 8:45:06 AM Central Standard Time, craxd1 at ezwv
>>com writes:
>>
>>
>>This means it's not part of the RF
>>circuit. The only time a filament choke is used in on indirectly heated
>>cathodes.
>>
>>
>>
>>oops...I think you meant to say directly heated... 
>> 
>> 
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> 
> 
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