And based on the AC3, there is a test point which is normally tied to ground. When you lift it from ground, you measure voltage drop across a resistor. This voltage happens to directly relate to final current. This allows you to easily adjust the bias w/o trying to figure out how accurate the rig's meter is calibrated, etc.
I modified my AC4R PCB to include a resistor etc. Sent the data to Wb4HFN. Don't think it was ever posted on his site. 73, Ron WD8SBB --- On Sat, 10/29/11, Jim Shorney <[email protected]> wrote: > From: Jim Shorney <[email protected]> > Subject: Re: [Drakelist] AC-3 vs AC-4 > To: "Drake List" <[email protected]> > Date: Saturday, October 29, 2011, 8:14 PM > On Sat, 29 Oct 2011 20:04:23 -0400, > Steve Wedge wrote: > > >The main question is this: what's the major difference > between the AC-3 and the AC-4? Is it strictly the > parts locations and the absence of the VOX RLY connector? > > See the thread here: > > http://www.mail-archive.com/[email protected]/msg04591.html > > 73 > > -Jim > > > -- > Ham Radio NU0C > Lincoln, Nebraska, U.S.S.A. > TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, > R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, > all the time! > > "Give a man a URL, and he will learn for an hour; teach him > to Google, and he will learn for a lifetime." > > HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ > http://incolor.inetnebr.com/jshorney > http://www.nebraskaghosts.org > > > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
