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   Home   Help Search  
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 41 
 on: Yesterday at 06:58:04 PM 
Started by KE7EOZ - Last post by KL7CW
K6AER, yes you are correct.  However it is easy to remove the bottom cover of the director and reflector and ground the center point.  My experiments showed no difference in Yagi performance with them grounded (temporary relay set up for testing only) in either receive or tx.  However Steppir says that under some conditions a floating reflector and director does reduce rx noise, although in the several months of my testing I never noticed any difference in rx noise levels with wind, rain, snow...however I do not claim STEPPIR is wrong.  In my case, with my 30/40 meter add on the the director and reflector center points do come back to a box on the mast and go through a balun, then coax to the shack, I suspect but do not know how they are coupled to the tower top through capacitance and/or inductance.  I say this since if I adjust the tower shunt feed to the center of 80 and 160 meters, with say 15 meter Yagi selected, I can change the 80 and 160 meter resonant frequency by a considerable amount by simply selecting the longer 20 meter Yagi, or a smaller 10 or 6 meter Yagi.  The SWR even stays low...so no need for remote vacuum variable capacitors to make excursions around 80 and 160 meters.  Even with my top 80 foot wire switched in for 160 meters, selecting different Yagi's still shifts the 160 meter resonance somewhat.  Thus I conclude in my situation only, my modified STEPPIR, does act as a variable top load as the elements are extended and retracted.  I suspect that the boom, reflector, and director, provide much of the top load in my situation, since the driven element is "sandwiched" between these pieces of hardware.  I have seen posts where some folks have grounded the center points of the STEPPIR director and reflector to insure a better top load. Even with completely floating director and reflector selecting different driven element lengths could very possibly significantly alter the 80 and possibly 160 meter resonant frequency due to  capacitance or inductance in the Yagi balun, or the long coax feed to the shack.  See my QST article if interested in how I gained access to the center points of the director and reflector.
     Thanks for the reply...it's great to see folks who read and question statements...we all need to be challenged since many folks just post or worse even tend to blindly believe anything they read.        KL7CW

 42 
 on: Yesterday at 06:53:30 PM 
Started by K9IUQ - Last post by K7JQ
To my understanding, the Flex 6000 series are actually stand alone SDR driven transceivers, and the only PC "part" needed is the monitor. The "Maestro" accessory only adds a knobs, buttons, and display option to it, much like having a removable faceplate like some mobile rigs out there. A friend of mine demo'd his Flex 6300, and only uses his PC's monitor. After 57 years in ham radio, I still prefer a "normal" transceiver, but I was impressed with its performance.
This seems like an over-simplified view.  A computer in some form is needed to run the GUI software.  Maestro is actually running a form of Windows inside, so it contains an embedded computer.

Thanks. Guess I misunderstood  what he was telling me. I always thought you needed some application/ operation of a computer O/S to run Flex radios.

 43 
 on: Yesterday at 06:52:07 PM 
Started by W2RWJ - Last post by NK7Z
You guys have done a really fine job on all of this...  It has been fun watching, thanks for sharing!

 44 
 on: Yesterday at 06:42:11 PM 
Started by W5JON - Last post by NK7Z
... Many of today's no code CB Extra class do not even know how to tune a amp and depend on plug and play rigs, amps and tuners to get on air.

(deliberate sarcasm here); "yea, we no-code extras are to blame for everything".

Ms. Tisha Hayes, AA4HA... the no-code extra

RANT MODE ON

I'm pretty sure that there exists a large, undisciplined cadre of "no-code extras", all with their QRP rigs strapped to their backs, shortened whip antennas being wielded like machetes, just waiting to get their hands on a KW level amp, so like the Walking Dead, they can wander the streets in hordes, looking for Old Timer hams in order to kill and eat them.  Much like a hive mind, these "No-Code-Extras" will behave as one entity, tune their amps, and take over 20 Meters, yelling UP UP UP every time someone accidentally transmits on the DX stations frequency...  Oh wait, that has already happened on 20, and it is not the no-code-extras doing it...  So never mind...

Honestly, the term "No code extra" ought to be stricken from the Amateur Radios vocabulary, and anyone using it whipped.  It is the fastest way to make an enemy of a new person in the hobby.  It does absolutely nothing but make the person saying it feel better about themselves, and demonstrates how utterly stupid someone can be once those words leave their mouth...

If you think another ham needs help in understanding how some item works, then help them for Gods sake, don't call them names like an eight year old, just help them...  How hard can this be...  Legislating inter-stage gain because you fear the hordes of Walking Dead No-Code-Extras will take over-- is-- well, just silly...

RANT MODE OFF

 45 
 on: Yesterday at 06:29:49 PM 
Started by N2NJO - Last post by N8EKT
Why not try a stub 1/4 wavelength filter... Less than 1 ft of coax and a Tee connector is simple enough.
You might need a multiple design to cover the whole bandwidth desired.
Cheap though!

-Mike.

Spot on Mike

And they do tend to be fairly wide notches so one may do the trick

 46 
 on: Yesterday at 06:21:51 PM 
Started by K3VJ - Last post by ZL1BBW
Make sure it is OFF and has been OFF for a while before checking the R's in the metering circuit.  Please.

 47 
 on: Yesterday at 06:16:22 PM 
Started by K3NRX - Last post by NK7Z
I was not saying one could not work DX during this cycle. It just stunk compared to any other cycle in the last 60 years.

Come on now. Wouldn't you like to hear DX on 10M almost anytime you turned the receiver on ?

When that SFI hangs at 63-65...... 20M will be a challenge.

N5UD
20 was pretty good today...  Take a look at:

http://nk7z.net/band-conditions/

Click on 20 Zone 4, or 5...  Big openings...

We got lucky, enjoy it while you can...    I am seeing a small 10 meter opening now...  But alas, I do miss the days of cycle 22...

 48 
 on: Yesterday at 06:10:08 PM 
Started by K3NRX - Last post by K3STX
What negative Nellies!! I just worked 2 new ones on 12 today; ZL and KH8. So 23 to go!!

P

 49 
 on: Yesterday at 06:09:03 PM 
Started by KZ7ZUL - Last post by N1UK
This is a useful link

http://www.hornucopia.com/contestcal/weeklycont.php


The numbers are normally sequential starting at 001. Sometimes they want zone numbers etc. It is all in the rules under Exchange


Mark N1UK

PS   For the Russian contest it looks like

Quote
UA: RST(Q) + 2-character oblast
non-UA: RST(Q) + QSO No.

So you would start with 59001  and then 59002 59003 etc you could say 59 one to be concise


 50 
 on: Yesterday at 06:01:42 PM 
Started by KE7EOZ - Last post by K6AER
If you shunt feed a tower for 160 you must ground the elements on the SteppIr to the boom. Normally the elements are floating.

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