[Elecraft] Problems with SSB Audio

[Ron D'Eau Claire]

"Raspy" is often the description given a signal from a K2 that is sitting
too close to a transformer so the a-c magnetic field modulates the VCO. If
you have a power supply, desk lamp with a transformer built in, or any other
transformer operated device nearby, try turning it off and see if your
signal clears up. 

If so, there's a mod for the K2 that will dramatically improve its
resistance to magnetic field effects. See www.elecraft.com for details.

About the power control, are you expecting it to go to work before your
transmit? It won't! The power control sets the "requested" output. The
actual output doesn't change until you transmit again, and transmit long
enough for the power monitor to note the actual output and adjust the
circuit to match the "requested" level you set with the POWER control. It's
not uncommon for ops to turn on a rig and notice that even though it's been
in receive for half an hour, when the hit the key the power stays at zero
for the first dash or several dits, depending upon the keying speed. That's
because the power control circuits are only then getting some RF to work
with to set the actual power output correctly. 

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Paul Wilton
Sent: Saturday, November 12, 2005 12:46 PM
To: Elecraft Discussion List
Subject: Re: [Elecraft] Problems with SSB Audio


Geoff,
I did try this but it didn't solve it.

What I have found is that I was wrong in believing the CW was OK - its 
not - it has a very raspy signal to it.  So I will try to track that 
down first.

I am confused about the behaviour of U2 on the SSB board - it seems to 
take a long time to ramp up if it is setting the PWR level.  However, 
before I worry much more about this one, I'll try and track down my 
raspy CW signal first.

73

Paul