[Lowfer] Oh, CRAP!

[Mike WE0H]

I make all my boards in ExpressPCB software & use the laser print/iron 
method to get the layout on the bare board. Then I use a 1:2 Muriatic 
acid & Peroxide etching solution to etch boards in 15 minutes. Express 
also gives out the schematic software along with the board layout 
software. They make boards too, but the software works perfect for 
homebrew boards to save money.

Mike
WE0H


Peter Cranwell wrote:
> There are a lot of board makers on the inrternet.  I have never made 
> one but I am in the process with a project I'm working on.  I would 
> not volunteer unti I have some experience but If you have the time & 
> inclination you can lay out the board & send the files to the board 
> makers.  Some supply their own software or you could use the free 
> version of Eagle if the board is less than 3X4 inches.
>
> Pete

> From: "KD7JYK DM09"
>
> Check THIS out:
>
> New Radio Frequency Found
>
> This is pretty cool for those of you who might like a higher frequency
> sideband channel to talk on, maybe use sometimes as a AM broadcast
> channel.
>
> Section (§) 15.225 Operation within the band 13.110 - 14.010 MHz.
>
> "(a) The field strength of any emissions within the band 13.553-13.567
> MHz shall not exceed 15,848 microvolts/meter at 30 meters."
>
> (b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the
> field strength of any emissions shall not exceed 334 microvolts/meter
> at 30 meters.
>
> (c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the field
> strength of any emissions shall not exceed 106 microvolts/meter at 30
> meters.
>
> (d) The field strength of any emissions appearing outside of the
> 13.110-14.010 MHz band shall not exceed the general radiated emission
> limits in § 15.209.
>
> Ok, this is how it breaks down:
>
> 13.553-13.567 MHz could be a nice place to go and talk on SSB?  Using
> a vertical or dipole antenna.  Maybe someone would do a broadcast
> there.  It is not a bad frequency in the daytime.
>
>  I think a CB radio is rated at 10,000 uV/3 m.  So, 15,848 uV/30 m is
> a way higher power level than the CB I think.  Got to re check Part 15
> to be sure?  That power level at a measurement of 30 meters is high.
>
> Compare to the CB band:  in Part 15;
>
> Section (§) 15.227 Operation within the band 26.96 - 27.28 MHz.
>
> (a) The field strength of any emission within this band shall not
> exceed 10,000 microvolts/meter at 3 meters. The emission limit in this
> paragraph is based on measurement instrumentation employing an average
> detector. The provisions in Section 15.35 for limiting peak emissions
> apply.
>
> Ok now see?  I got the stuff to backwards engineer the input power to
> the antenna based upon the above 15,848 uV/30 m.  But I would have to
> do a PC search here to locate my notes and equations.  Field strength
> equations.
>
> (Little off topic note: if any of you know someone who makes printed
> circuit boards.  I am interested in making kits.  But we do not have
> to hurry and rush it up.  I still have some files to run and tweak on
> the designs.  But will be looking for a partner to collaborate with.
> I write help text also for the builders and so, this can help the
> partner to understand the kit and it's use.  If you know someone, just
> drop me a line at my message box.  I use LTspice software as my design
> software and all of my circuits have LTspice analysis files with them.)