AW: [DSP-10] CW transmit has a raspy sound

[Paul Kupper]

Hi Lee,

The original MSA0686 has a Output Power of 2 dbm at 1 dbm comp.
The MSA0486 has a Max Inp Power of 13 dbm and the third IP is 25.5 dbm.

The currents to the devices seem normal.

I guess the problem is in the oscillator circuit with Q101.
I had to change the C141 value to be able to tune.

C145 ok? Supply Voltage ok?

73 HB9OMQ Paul

> -----Ursprungliche Nachricht-----
> Von: dsp-10-bounces at mailman.qth.net
> [mailto:dsp-10-bounces at mailman.qth.net]Im Auftrag von Lee Scott - AA1YN
> Gesendet: Mittwoch, 29. Marz 2006 21:05
> An: kd7ts at ispwest.com; Discussion of DSP-10 2-meter transceiver
> Betreff: Re: [DSP-10] CW transmit has a raspy sound
>
>
> At 10:30 AM 3/29/2006 -0800, you wrote:
> >Hi Lee,
> >
> >I've looked at your pictures, but I am not familiar with the SA display.
> >Is this showing +12 dbm at the peak ? If not, what is the power into the
> >coax that feeds the TUF-1 ?
> >
> >Can you confirm the power level with a power meter ?
> >
> >Mike KD7TS
>
> Hi Mike,
>
> The output of the osc is indeed +12dBm as confirmed by an HP 435B power
> meter. The peak of the SA display is approx +11dBm but the
> analyzer is not
> calibrated where my power meter is.
>
> Lee - AA1YN
>
>
>
> Lee Scott - AA1YN http://www.aa1yn.com
> Home of the VHF & Up Register http://www.aa1yn.com/vhf
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> Hooksett, NH
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>
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