newbie questions

[Steve Kirk/ KW5TX]

forgive the newbie questions pls...but

1. Is there a menu item for Carrier Insert for SSB ?  (frequency offset
to change the tone of the TX Audio)
2. Is there just the one menu for Mic Gain?     ( 1 (att) , 2 (att off)
and 3   (att off)    maybe im missing something ... i sorta need an in
between setting
3. What is a good ...mid priced...Soldering Station Brand ?


thanks
Steve
KW5TX

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[Don Wilhelm-3]

Steve,

If I interpret your first question correctly regarding 'frequency offset':
The 'frequency offset' for SSB would be the BFO setting for the FL1 filter
position - also note that you must set the SSB FL1 filter width to OP1 -
otherwise the transmitted passband can be quite skewed.
The FL1 BFO frequency is used as the carrier oscillator frequency during
transmit - that is true for all modes, not just SSB (there is a separate set
of 4 filters for each mode).  During CW receive, the frequency is offset by
the amount of your chosen sidetone pitch, but on SSB, there is no offset
inserted, the transmmit frequency is the difference (or sum) of the BFO and
the VCO frequencies.  This adjustment is covered in the BFO alignment
sections of the manual(s), but most of us refer to it as 'Filter Alignment'
or 'CAL PLL' and is most easily accomplished with a wideband noise generator
while observing the resulting passband with an audio Spectrum Analyzer type
display (Spectrogram is one example of such an analyzer, it uses the
computer soundcard to do a FFT of the input signal).  The K2 Dial
Calibration article on my website http://w3fpr.qrpradio.com has the filter
alignment process (CAL FIL) contained within it.

The K2 mic gain is as you describe it.  The Speech Processor chip does a
great job of limiting the audio under normal conditions with a typical
amateur class mic having adequate (normal) output.  If you are using a Heil
mic with the HC4 or HC5 elements, you may need additional gain because those
elements output is 6 to 10 dB below the average ham mic - a preamp is the
best solution if that is your chosen mic.  You should not normally need
anything between the mic gain setting if the speech processor is doing its
job.

As for soldering stations, I like the Hakko 936, but there are lesser priced
alternatives as well as more expensive.  Had you stated your price target
range in dollars, I could offer better alternatives.

73,
Don W3FPR

> -----Original Message-----
>
> forgive the newbie questions pls...but
>
> 1. Is there a menu item for Carrier Insert for SSB ?  (frequency offset
> to change the tone of the TX Audio)
> 2. Is there just the one menu for Mic Gain?     ( 1 (att) , 2 (att off)
> and 3   (att off)    maybe im missing something ... i sorta need an in
> between setting
> 3. What is a good ...mid priced...Soldering Station Brand ?
>
>
> thanks
> Steve
> KW5TX
>

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