AW: [DSP-10] CW transmit has a raspy sound
Lee Scott - AA1YN
aa1yn at aa1yn.com
Wed Mar 29 17:43:45 EST 2006
At 01:43 PM 3/29/2006 -0800, you wrote:
>QST
>Sept 1999 page 41
>
>A pair of IC amplifiers, U105 and U106, raise the power level to 7 dBm and
>prevent strong signals from getting back to the VCO. At a 10-kHz offset,
>the phase noise is about -105 dBc.
Ok,
Now the question is how do you adjust the output of the osc? Do you do
this by adjusting the ratio of C117 and C118?
As far as the 19.68MHz osc, both mine and NG4C's produce about 10dBm on the
output of U9.
Are these measurements with a 50 ohm load or connected to the TUF-1 mixers
and a 50ohm load or a voltage reading and then calculated?
Lee Scott - AA1YN http://www.aa1yn.com
Home of the VHF & Up Register http://www.aa1yn.com/vhf
Home of the VHF Talk chatroom http://vhftalk.aa1yn.com
Hooksett, NH
FN43gc52
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