Thank You Don! I did R1 adjustment during lunchbreak using RF-probe and got it about right. I will check cantenna resistance afterwards and re-adjust if necessary. I was worried about breaking RF-probe, but now I believe I can connect it with dummy load and can't connect it directly to antenna jack.
73 Jukka, OH4MFA K2 #4293 >--Alkuperäinen viesti-- >Reply-To: "Don Wilhelm" <[EMAIL PROTECTED]> >From: "Don Wilhelm" <[EMAIL PROTECTED]> >To: "Jukka Tarvainen (OH4MFA)" <[EMAIL PROTECTED]>, > <[email protected]> >Subject: Re: [Elecraft] K2 #4293 KAT2, KNB2 etc. >Date: Mon, 21 Jun 2004 09:16:36 -0400 > > >Jukka, > >Why not just use the RF probe built from the parts supplied with the K2 kit >and you will have an instrument that you can trust? The RF probe built into >the Heath cantenna MAY be the same thing, but I just can't recall how it >is >configured. > >Then you can use the RF probe (and your DMM) connected across the dummy load >to measure the rms RF voltage and determine the power output = V*V/R. (The >DMM should read the rms value of the RF voltage directly for voltages above >about 1 volt) > >Of course, you must know the resistance of the dummy load accurately too >if >you are expecting to do an accurate calibration. For a dummy load to be >a >true dummy load, it must be entirely resistive (no reactance) at the >frequency it is being driven. The old Heath cantenna is only OK in this >respect, and I have heard reports that the resistance does change a bit with >age. (You can check a dummy load by measuring it with an antenna analyzer.) > >73, >Don W3FPR > _______________________________________________________________________ Parhaat hakupalvelut yhdessä osoitteessa: http://www.eniro.fi/ Suomalaisten yritysten tuotteet ja palvelut: http://yritykset.eniro.fi/ _______________________________________________ Elecraft mailing list Post to: [email protected] http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
