[Amps] 160M PI network Toroidal Coil

[Jim W7RY]

Paul
See the 3CX1500D7 amplifier project in the later versions of the ARRL 
handbook by Jerry K8RA. He uses a toroidal coil for both 80 and 160 
meters. That may give you some ideas too.

73
Jim W7RY


On 10/5/2013 8:10 AM, Carl wrote:
> Micrometals 2 mix, usually a stack of 2 T200-2's wrapped with Scotch 
> 27 tape, then Teflon insulated #14 stranded or solid.
> However starting from scratch will require about twice the inductance 
> of just adding 160 to the amp.
>
> Use the Micrometals turns calculators to see if it fits. If not there 
> are wider choices.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Paul Baldock" <paul at paulbaldock.com>
> To: <amps at contesting.com>
> Sent: Friday, October 04, 2013 10:47 PM
> Subject: [Amps] 160M PI network Toroidal Coil
>
>
>> I'm going to convert a SB221 to a single band 160M amp. It seems most 
>> of the amps these days use a toroidal coil for the 160M Output PI 
>> network. Does anybody know what cores are typically used for the 160M 
>> toroid?
>>
>> Thanks
>>
>> - Paul   KW7Y
>>
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