Re: k2 spurious

Posted by Don Wilhelm on Oct 25, 2020; 6:17pm
URL: http://elecraft.85.s1.nabble.com/k2-spurious-tp7665916p7665920.html

Carlos,

Do you have the internal frequency counter probe plugged into TP2?  That
is one possible cause, remove it and retest.  CW or SSB mode?  All
spurious signals should be greater than 43 dB below the carrier level -
they cannot be expressed meaningfully in dBm, only with respect to the
carrier.

The binocular toroid is a transformer to match the impedance of the PA
collectors to 50 ohms, which is the input impedance of the Low Pass Filters.

73,
Don W3FPR

On 10/25/2020 7:40 AM, carlos popelier wrote:
> hi, i see 2 spurious left and right from the 3,5mhz main carrier, output 10w,
> on 2,1 mhz and 4,9 mhz  -40 and -38 dbm with -30dbm attenuation
> i wonder i anyone could tell me the correct level for the attenuation
> and maybe why this signals are there, not so simple as i stated of
> course,and what is the purpose of the binocular toroid in the power
> amp section.
> carlos on6cn
>
______________________________________________________________
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
Message delivered to [hidden email]