[NLRS] July 10GHz "tune-up ?"

[Donn - WA2VOI/0]

Hi Scott.
Yup, 10GHz only.  As you say, another set of gear for 2.1GHz.

Be a little careful on that probe... shortening the probe may NOT bring it "up" 
to 10GHz.  Length, diameter, and distance to the backshort are all 
interdependent re: return loss and frequency.  I'll see if I can dig up a paper 
from several years ago that talks about that and send you a copy.

73 Donn
WA2VOI/0


----- Original Message ----- 
From: "Scott" <acepilot at bloomer.net>
To: "Donn - WA2VOI/0" <wa2voi at mninter.net>
Sent: Saturday, July 03, 2010 11:44 AM
Subject: Re: [NLRS] July 10GHz "tune-up ?"


> I'd be in.  Nothing else on my calendar that I'm aware of.  Would the "tune 
> up" be stricly for 10 GHz?  I have a couple of small  ~2 GHz cavity type 
> filters I bought at that surplus place in Minneapolis at the last Microwave 
> Update in Bloomington (2008) that I'd like to see if they can be moved to 2160 
> MHz (for LO selection).  If that requires bringing out a whole 'nuther set of 
> test gear, don't do it just on my account...I /*can*/ do it with my spectrum 
> analyzer...
>
> I wouldn't mind playing with my 10 GHz feedhorn as well...at MUD09, we tested 
> it on the network analyzer (I think that's what it was) and it looks like the 
> best return loss was at about 9.7 GHz, so I'd like to file down the probe 
> length and see if I can get it as close to 10.368 GHz as possible...
>
> And...of course...I'd *LOVE *to play some 10 GHz from there too :)
>
> N0EDV
>
>
>
>
> Donn - WA2VOI/0 wrote:
>> 'Morning, all.
>>
>> As you know, its been a couple of years since we had a summer 10GHz Tune-up 
>> session.  So, should we get together and do one before Rovermania and the 
>> 10GHz Contest ?  It would give everyone a chance to "get in the mood," maybe 
>> peak up the antennas, or try out the newly rebuilt 10GHz system.  Maybe dig 
>> out the 10GHz WBFM gear and give it a workout, too.
>>
>> In the past we've used the area of Mounds Park in St. Paul just west (down 
>> hill) from the Aero Beacon for the antenna range and then moved up hill 
>> (under the Beacon) for a lite lunch and maybe some operating.  Its a short 
>> LOS shot over to the Capital overlook for WBFM or low power SSB.  If the 
>> brush and trees aren't too big, its also an LOS shot down the Mississippi 
>> River valley to Idel Ave. near Hastings.  On the same headings, but over the 
>> horizon are New Trier and Cannon Falls.  These are "chip shots" for 10GHz 
>> SSB, but are do-able for WBFM. I know some folks are working on 24GHz WBFM 
>> and some have 24GHz SSB.  These are also good places to try that gear if the 
>> humidity isn't too bad.  Its 15 miles (24 km) LOS to Idel Ave, ~25 miles 
>> (~40km) non-LOS to New Trier, and ~35 miles (56km) non-LOS to Cannon Falls.
>>
>> So.  Is there any interest in getting together for 10GHz antenna tune-up, 
>> simple operating, and maybe some 24GHz operating in July ?  The date I'm 
>> looking at is 17 July, and we'd do it at Mounds Park in St.Paul.  9AM to 
>> mid-to late afternoon.  If there is sufficient interest, I'll OK it with the 
>> Park Board and drag out the test equipment.
>>
>> Let's talk about it and then let me know.  If there's interest by next 
>> weekend (4th of July weekend), I'll go ahead with plans; otherwise, we'll 
>> skip it this year.
>>
>> 73 Donn
>> WA2VOI/0
>>
>>
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>
> -- 
> Scott
> http://corbenflyer.tripod.com/
> Flying Corben Junior Ace - Building RV-4
> Gotta Fly or Gonna Die
>
>
>