[NSRCA-discussion] 2,4 Module

[Mark Atwood]

2???  Del, where do you live??   For some reason I didn¹t picture you in the
NY/NJ area.   That or my regions are messed up.

KB8TSU


On 5/8/08 3:03 PM, "Del Rykert" <drykert2 at rochester.rr.com> wrote:

> I thought that was kb2joi  clear  <tic>
>  
>     Del
>>  
>> ----- Original Message -----
>>  
>> From:  Jay  Marshall <mailto:lightfoot at sc.rr.com>
>>  
>> To: 'General pattern  discussion' <mailto:nsrca-discussion at lists.nsrca.org>
>>  
>> Sent: Thursday, May 08, 2008 11:35  AM
>>  
>> Subject: Re: [NSRCA-discussion] 2,4  Module
>>  
>> 
>>  
>>  
>> 
>> Roger that! Over and  out Š..
>>  
>>  
>>  
>>  
>> 
>> Jay  Marshall 
>>  
>> 
>> -----Original  Message-----
>> From:  nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]  On Behalf Of Mark  Atwood
>> Sent: Thursday, May  08, 2008 11:31 AM
>> To:  General pattern  discussion
>> Subject: Re: [NSRCA-discussion] 2,4  Module
>>  
>>  
>>  
>> Yeah...but do we REALLY want to  go there????  Lmao...  Then it will start to
>> sound like the HAM  forum...
>> 
>> 
>> 
>> 
>> On 5/8/08 11:27 AM, "Jay Marshall"  <lightfoot at sc.rr.com> wrote:
>>  
>> In free  space.  Wire and dielectric will alter this somewhat.  <grin>
>>  
>> 
>> Jay  Marshall  
>> 
>> -----Original  Message-----
>> From:  nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]
>> <mailto:nsrca-discussion-bounces at lists.nsrca.org%5d>   On Behalf Of Mark
>> Atwood
>> Sent: Thursday, May  08, 2008 11:20 AM
>> To: General  pattern discussion
>> Subject:  Re: [NSRCA-discussion] 2,4 Module
>> 
>> The antenna¹s we  used on the 72mhz band were 1/4 wave antenna¹s.  Approx 1
>> m.  The  72Mhz wavelength is 416cm for a full wave (varying some for which
>> specific  frequency you were on.
>> 
>> The 2.4Ghz wavelength is only 12.4cm or about  4.8in.   So an equivalent
>> quarter wave antenna will only be about  1.2in in length.
>> 
>> -M
>> 
>> PS for those that care, wavelength (in cm) =  speed of light (in cm) /
>> Frequency (in cycles per second)
>> 
>> 
>> On 5/8/08  10:54 AM, "rcmaster199 at aol.com" <rcmaster199 at aol.com>  wrote:
>> ***When you  realize all this from that measley little 4" antenna, it's
>> almost  jaw-dropping.  ***
>> 
>>  
>> Basically, the  length of the antenna is related to frequency of the
>> transmission. 2.4 gig  freq is made up of small wavelength. If you remember
>> High School Physics, the  relation between Freq and Wavelength... ie- it's an
>> inverse relationship. As  Freq goes up, WL becomes small. At 72 meg, WL is
>> fairly long, hence the reason  for the longer antenna; at 27 meg, wl is even
>> longer. Those who used 27 meg  equipment a bunch of moons ago, will remember
>> that Tx and RX antennas were  pretty long and only represented 1/2 the WL (I
>> think it was  1/2)
>>  
>> Dean Pappas, Ed Alt and Jim Oddino can explain further if  needed
>>  
>> BTW, tuning a pipe on a 2 stroke requires similar  understanding between rpm
>> (base frequency) and tuning length (wavelength of  the exhaust pressure front
>> and type of exhaust) to achieve the desired  resonance....similar to
>> electrical antennas.  QED
>>  
>> MattK
>>  
>>  
>>  
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