[Elecraft] KSB2 problem

Sun Sep 15 11:38:00 2002

Here are some more details re: my KSB2 problem.

It's configured as 0.1W, SSBA=3, SSBC=2:1

The receive audio is excellent.

It's the tx audio which "warbles" and is quite distorted.

I've tried a Heil Pro-set and an Icom HM-36 hand mic (this one needs the
resistor +5v to AF) but they both sound the same.

U1-16 has the correct voltage on switch-on (6v) but it starts to reduce as I
transmit.  It then fluctuates before falling to 0v.

U2-6 does the same.

Anyone had a similar problem who can point me in the right direction?

Thanks,
Steve G0CKP/AB6ZA

----- Original Message -----
From: Phil Wheeler <[email protected]>
To: Steve Knell <[email protected]>
Cc: <[email protected]>; <[email protected]>
Sent: Sunday, September 15, 2002 3:47 PM
Subject: Re: [Elecraft] KSB2 problem

> Steve Knell wrote:
>
> >Hi
> >
> >I just added the SSB module to my K2.
> >
> >I'm getting distorted audio.
> >
>
> RX, TX or both?
>
> >
> >
> >I can't see any bad connections or bridges on the board.
> >
> >The problem seems to be around U1/U2.
> >
> >U1-16 reduces to zero after a few seconds of tx.
> >
> >U2-6 does the same.
> >
> >All other voltages checks are ok (U4-6 is at 5.8 instead of 5.1, but
that's
> >probably ok?).
> >
> >Anyone seen these symptoms before?
> >
>
> You might want to read the notes here and see if something connects.
>
> http://www.qsl.net/ve3mcf/elecraft_reflect/index.html
>
> Also -- you did not mention what mic you are using and what combo of mic
> gain and compression you have selected.
>
> 73, Phil
>
>
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