WHY HIGH RF OUTPUT???

[JIM DAVIS-11]

Gentlemen,

As measured on a "BIRD TRU-LINE (Mod43) with a 250w. slug our RF out from our K3 is:

80m:  180w.
40m: 150w.

WHY???

I ask this because our WATT METER is a accurate device and no one can dispute its accuracy!!!

Regards,

Jim/nn6ee











______________________________________________________________
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

[Jim Garland]

Hi Jim,
Sounds to me like you've got a bad slug in your Bird wattmeter. If they're
dropped or jarred they can change calibration significantly.  Also, you
didn't mention the frequency range for the slug. If it's designed for VHF,
it will read high on HF. To me, the numbers you're getting don't sound
plausible. BTW, the correct name of the Bird 43 is "Thruline," not
"Tru-Line".

73,
Jim W8ZR

> -----Original Message-----
> From: [hidden email] [mailto:elecraft-
> [hidden email]] On Behalf Of JIM DAVIS
> Sent: Thursday, February 05, 2009 4:58 PM
> To: [hidden email]
> Subject: [Elecraft] WHY HIGH RF OUTPUT???
>
> Gentlemen,
>
> As measured on a "BIRD TRU-LINE (Mod43) with a 250w. slug our RF out from
> our K3 is:
>
> 80m:  180w.
> 40m: 150w.
>
> WHY???
>
> I ask this because our WATT METER is a accurate device and no one can
> dispute its accuracy!!!
>
> Regards,
>
> Jim/nn6ee
>
>
>
>
>
>
>
>
>
>
>
> ______________________________________________________________
> 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

______________________________________________________________
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

[daleputnam]

Jim,
 Is this being measured into a known 50 ohm load? Or is it a tuned circuit of some sort?
If the load is somewhat reactive at certain freq. or if the coax connecting the meter into the circuit has an issue with certain freq. then it is very likely to attain the different readings on a wattmeter.
 

--... ...--
 Dale - WC7S in Wy

> From: [hidden email]
> To: [hidden email]
> Date: Thu, 5 Feb 2009 15:58:05 -0800
> Subject: [Elecraft] WHY HIGH RF OUTPUT???
>
> Gentlemen,
>
> As measured on a "BIRD TRU-LINE (Mod43) with a 250w. slug our RF out from our K3 is:
>
> 80m: 180w.
> 40m: 150w.
>
> WHY???
>
> I ask this because our WATT METER is a accurate device and no one can dispute its accuracy!!!
>
> Regards,
>
> Jim/nn6ee
>
>
>
>
>
>
>
>
>
>
>
> ______________________________________________________________
> 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

---

Windows Live™: E-mail. Chat. Share. Get more ways to connect. Check it out.
______________________________________________________________
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