The 4 times rule for matching transformer impedance

On 18.1.15 23:05, amdx wrote:
>
>>>   The tank is designed to tune the AM band 550KHz to 1700kHz with a
>>> variable cap. The design also is built with minimum losses.
>>>    The working numbers are around 240uh with a 15pf to 365pf variable
>>> capacitor.
>>>   Did you have a different design in mind?
>>
>> There is a simple way: Take the signal out from a tap in the tank coil,
>> instead of from the top. If you want to keep the tank Q, you should also
>> avoid coupling the antenna directly to the tank top end.
>>
>
>   yes, however would you not have a lower voltage on a tap meaning
> a lower drive to the headphones.

Yes - the same applies when you scale the impedance down on the
audio side. There is no free lunch ...

-- 

-TV

On Sunday, January 18, 2015 at 11:11:19 PM UTC-5, DecadentLinuxUserNumeroUno wrote:
> On Sun, 18 Jan 2015 14:39:50 -0800, bloggs.fredbloggs.fred wrote:
> 
> > As per usual,
> 
> BloogsTard makes another pathetic, useless, empty post.

No originality at all- such a boring nobody of a non-entity- sad.