[Elecraft] K3-100 #1433 Will not transmit on 40 meters LSB.

[Jack Regan]

Bill, Ian

Thanks for the replies. Re: BIAS. I saw the word DYNAMIC on the mic (a
Kenwood MC-43S) and a pin out that showed 8V and jumped to the conclusion
that bias was needed.

That was seemingly confirmed when I was able to get the mic to work only
when I had BIAS on. There could be some confusion because I was dealing with
filter tx settings at the same time.

I now have FP.L and no bias. 20 meters USB works. I get RF out on the
display.

On 40 meters LSB I can still hear the mic on the radio but still get no rf
out.

The K3 Utility under Configuration shows a 2.8 filter TX SSB
When I go into CONFIG: FLTX SB FL3 LSB shows.

What else could be going on!

 

-----Original Message-----
From: Bill NY9H [mailto:ny9h at arrl.net] 
Sent: Tuesday, August 12, 2008 8:59 AM
To: Jack Regan
Subject: Re: [Elecraft] K3-100 #1433 Will not transmit on 40 meters LSB.

the bias should be off for a dynamic element.....

could be the bias being on is messing up stuff.....

Only an electret requires that bias voltage.

bill

At 11:52 PM 8/11/2008, you wrote:
>The rig works well on all the USB bands. Mic is a Kenwood 600 ohm dynamic
>mic.  Bias is on.  Front panel Input.
>
>
>
>On 7.180 (for example) PTT puts rig in transmit mode. Red TX led comes on.
>Voice or tapping the mic is heard from the K3 internal speaker.
>
>NOTHING MOVES ON THE RF DISPLAY. On 20 USB the display show the appropriate
>peak power output.
>
>
>
>I have looked at the manual but cannot find what I need in the wealth of
>options.
>
>
>
>Hope you guys can help!
>
>
>
>I do have the K3 Utility up and running. I went over the crystal
>configuration settings that I have with Scott at Elecraft to confirm my set
>up.
>
>At the time my USB transmissions were working so when Scott confirmed my
>choices I felt good about having deciphered the manual!  Scott also
>confirmed my mic set up.
>
>
>
>Was I ever surprised when I could not transmit on 40 LSB this afternoon!
>
>
>
>Thanks in advance,
>
>
>
>Jack, AE6GC, KX1 #1403, K3-100 Kit #1433.
>
>
>
>
>
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