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Looking at the MK-XI BCB Transmitter

Here we have a nice solid state unit (solid state? what, am I 100 years old?) using an oscillator can for crystal control.
     Easily assembled on perf-board (Mmm, gotta love the forgiveness of AM BCB!) with a delightfully short parts list, this little unit has been discussed and modded for the last four years or so over at Antique Radio Forums.
     The latest mods include adding a little built in MP3 player and a variety of cases - sweet!
     Because this is such a simple circuit, the usual shortcomings will apply - no real buffer amp and little input isolation will make it a jumpy tune up but gee, with so little to invest, why not try it?
     One more thing to think about trying might be to bump that can up to the Part 15 shortwave freqs and see what this circuit can do at 13.5 MHZ.
     I'd probably drop L2 altogether and use an 18' longwire, the approximate quarter wave at that freq, and drop L1 way down and see what it can do.
It looks like this little circuit is highly amenable to experimentation as there are no less than 44 pages of discussion about this circuit, so check it out

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Get on the Air with One Click, Buy a Transmitter Bundle from Amazon.com

Many hobbyists agree that the F-S variable power 0.1 to 0.5 W FM Transmitter is one of the best transmitters for the price.  Add the convenience of a selection of premium quality accessories and you can literally be on the air with a single click.
     No need to search the web for FM broadcast antenna, FM transmitter antenna plans or FM broadcast antenna diy, this great combo includes an F-S Electronics RangeBooster 2.0 Ground Plane Antenna. 
     Connect your antenna to the transmitter with your included ultra low-loss  (55.4 db/100m), 8 mm diameter,  rugged class 8D broadcasting cable and add your programming with the included 6 foot heavy duty stereo audio cable. 
     Necessary adapters are included, too - a simple and cost-effective solution to increase your range, minimize signal loss and maximize your broadcasting enjoyment.
     Peace of mind with the lifetime warranty.

Check out these reviews from real users:

• "All components of the bundle are high quality."
• "The Rangebooster antenna definitely extends the range"
• "Signal goes through brick-metal buildings and embankments as if they were not there"
• "The transmitter unit defaults to .1 watts which is how I've been using it."
• "I am able to get more range with the external antenna"
• "Set up was so easy. The sound quality was awesome. I love this transmitter!"
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