Re: Apple II preamplifier

["Bill Garber" <willy46pa@comcast.net>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message 
fd-dnSbLfI02FAXenZ2dnUVZ_sadnZ2d@comcast.com">news:fd-dnSbLfI02FAXenZ2dnUVZ_sadnZ2d@comcast.com...
> Bill Garber wrote:
>> "Alex Freed" <alexf@mirrow.com> wrote in message 
>> NcCdnavf1cAVkgXenZ2dnUVZ_s2dnZ2d@comcast.com">news:NcCdnavf1cAVkgXenZ2dnUVZ_s2dnZ2d@comcast.com...
>>
>>>Wow! How many solutions for a non-problem!
>>>
>>>There is no need for an amplifier for a simple reason that the
>>>tape output is driven by a full TTL signal. Almost 5 volts.
>>>The reason the signal is weak at the jack is because of 2 resistors
>>>forming a divider.
>>>
>>>-------------R------------------->
>>>                       |
>>>                       R
>>>                       |
>>>                      ___
>>>
>>>
>>>Cut the lower one and enjoy full 5 volts. Or replace with say 4-5 K 
>>>resistor to get line level.
>>
>>
>> Excellent solution Alex. However, the INPUT was the one in question.
>
> Actually, it's the *output* that is attenuated to millivolt levels
> for a microphone input to a cassette recorder.
>
> The input is amplified and clipped to accept a 1vpp signal.


Despite what IS correct, I was going by the OP's post.
Have a look. I guess he got it wrong from the start.

Bill Garber