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

[Jack]

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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[Guy, K2AV]

Do you have power per band set in your configuration? If so you may not have advanced the power on 40m. Simply turn the power knob on 40m and make sure you have it set to your desired value.  

The first time I turned that option on, all of the bands defaulted to some very low level (0.5?). It's very handy for setting amp drive levels that vary per band so I don't need to use ALC or worry about it as I change bands.

73, Guy.

Jack Regan-2 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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[Jack]

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:[hidden email]]
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.
>
>
>
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

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