[600MRG] Q meters

[Laurence KL7 L]

or 3 hrs 27 mins to Seattle at 540Kts :-)
 
> Date: Sun, 27 Sep 2015 15:52:36 -0800
> To: n6lf at epud.net; 600mrg at w7ekb.com
> From: kl7uw at acsalaska.net
> Subject: Re: [600MRG] Q meters
> 
> Rudy,
> 
> Good idea if you live in the lower-48 with several flea markets a 
> month to chose from.  We only have three per year up here and they 
> are now over for the year.  One is local (we held it two weeks ago) 
> there were no Q-meters at it.  I did score a CE-5 Cushman service 
> monitor which is fully functional for $50.
> 
> The other flea markets are 230-mile away (5-hour drive) or 450-mile 
> drive (9-hours) and also unlikely to have this stuff.  But you can 
> buy all the FT-101E's you might like ;-)
> 
> Otherwise its a four hour drive to the airport, and 3-1/2 hour $900 
> flight to Seattle and car rental and hotel charges and eating in 
> restaurants to get to any of your flea markets...call it $1500 
> min.  Then hope you don't pay excessive baggage fees getting one back.
> 
> But maybe I could find one on e-bay and only pay $250 shipping to get 
> it up here.
> 
> Ah did you mean to write HP432A as that is a mw power meter and I 
> already have one.
> 
> My base coil is built so how is one supposed to improve it?  I used 
> my MFJ analyzer to resonate the antenna and then tapped the bottom to 
> get a match to 50-ohm coax.
> 
> Can't I deduce Q from measuring antenna bandwidth?  Its about 5-7 Hz.
> 
> 73, Ed
> 
> At 02:44 PM 9/27/2015, Rudy Severns wrote:
> >Old Boonton/HP Q-meters (160A or 260A) should go for $50-$100 at flea
> >markets.  The newer but well used HP4342A Q-meters should only be $200 or
> >so.  EBay is of course the high priced place to look but I saw few under
> >$100 in a quick check.  Keep your eyes open and shop around!  Once you have
> >one of these in hand you can really work on improving your coil Q's and also
> >having the correct numbers for analysis.
> >
> >
> >
> >In most amateur antennas efficiency will be dominated by loading inductor
> >loss.  Knowing and improving the Q is the key to efficiency once you have
> >the vertical as high possible with as much top-loading as possible.   Of
> >course that's at 630m, at 2200m it will be overwhelming the case.
> >
> >
> >
> >73, Rudy N6LF
> >
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> 
> 73, Ed - KL7UW
> http://www.kl7uw.com
>      "Kits made by KL7UW"
> Dubus Mag business:
>      dubususa at gmail.com
> 
> 
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