K2ssb

[John Cooper]

My k2ssb when u put in transmit the led bargraph doesn't light up as u talk.  Tried switching to alc mode where it lights backwards still nothing.  My wattmeter shows I'm getting out though.  If it matters I have the last led in the bargraph set for zero beat.  It works on recieve just fine.  The op1 filters work great but I seem to have lost my cw filters 2-4 they were fine before adding ssb option.  

John WT5Y


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[Don Wilhelm-4]

John,

On your audio and lack of bargraph indication - yes, the bargraph should
go up to about where the requested power is set on voice peaks.
Set your SSBC setting to 3-1 and try again.  If you are using an
electret microphone (Elecraft MH2 or ProSet-K2) you must have the bias
resistor between mic jack pin 6 and pin 1 (5.6k).
If you are using a dynamic microphone, the bias resistor must be removed
to prevent current flow through the mic element.

For high output electret mics, it is usually sufficient to set SSBA to
1, but low output dynamic mics (read Heil as well as professional mics)
have quite low output.  In that case, set the SSBA to 2 or even 3.  If
you have a very low output microphone, you may need to add a mic preamp.

If your CW and narrow SSB filter response is down since adding the KSB2,
I would suggest a thorough check of the diode orientation and soldering
of every component around the KSB2 filter area.

Check the amplitude of the headphone audio using a steady signal into
the antenna and the K2 in CW mode.  The Spectrogram display is a good
indicator of relative amplitude.  The CW signal amplitude should be the
same as the OP1 filter response.

73,
Don W3FPR

On 4/10/2014 11:51 AM, John Cooper wrote:

> My k2ssb when u put in transmit the led bargraph doesn't light up as u talk.  Tried switching to alc mode where it lights backwards still nothing.  My wattmeter shows I'm getting out though.  If it matters I have the last led in the bargraph set for zero beat.  It works on recieve just fine.  The op1 filters work great but I seem to have lost my cw filters 2-4 they were fine before adding ssb option.
>
> John WT5Y
>
>
> Sent from my Cricket smartphone
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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