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<H2 class=date-header><SPAN>Friday, August 21, 2009</SPAN></H2>
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<H3 class="post-title entry-title">James Bond's 9V QRP Transceiver </H3>
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<DIV class="post-body entry-content" id=post-body-136584821508004255>OK, perhaps it's not quite as elegant as a "Q" creation, but hey, I can see Sean Connery pulling this little gizmo out of his pocket for some quick QRP action whenever there's a lull between seducing women and saving the world.<BR><BR>I built this back in '96 (when I was still WA6AHL). I was inspired by a couple of ideas -- the first was a description of the "Pixie 2" transceiver which appeared in the December, 1993 issue "QRPp" (the Journal of the Northern California QRP Club). The Pixie 2 had been built into a 35 mm film canister, which I thought was a pretty cool idea. Then there was some chatter on the QRPp list about a new design by Wayne Burdick, the "Forty-Niner" (a forty-meter, 9 volt transceiver). He hadn't yet published the schematic, but there was a parts list available, and I started thinking...a 9 volt battery shell would be the ideal housing for a 9V transceiver -- the battery connector is built-in!<BR><BR>So, inspired by the idea of Wayne's "Forty-Niner" and using his parts list as a starting point, I undertook my own design, which, through the judicious use of whatever surface-mount components I could find, allowed me to cram everything within the 9V battery case.<BR><BR>An SMA connector serves as the antenna jack, and I bring both key and headphones into the radio via a single 1/8" stereo phone jack (Tip = headphones, Ring = key). An adapter cable breaks out these two signals into two seperate jacks.<BR><BR>
<DIV style="TEXT-ALIGN: center">(Click on any image to enlarge.)<BR></DIV><A href="http://4.bp.blogspot.com/_WsjWJ8e16xw/So7TkB4T-xI/AAAAAAAAAeE/GjWORyRkAM8/s1600-h/IMG_0984.JPG"><IMG id=BLOGGER_PHOTO_ID_5372464021432957714 style="DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 400px; CURSOR: pointer; HEIGHT: 300px; TEXT-ALIGN: center" alt="" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2F4.bp.blogspot.com%2F_WsjWJ8e16xw%2FSo7TkB4T-xI%2FAAAAAAAAAeE%2FGjWORyRkAM8%2Fs400%2FIMG_0984.JPG" border=0 closure_uid_9chugz="3"></A><BR>"Input Attenuation" and "VXO frequency control" are handled via two pots on the opposite side of the battery from the battery connector. Screwdriver controlled!<BR><BR><A href="http://1.bp.blogspot.com/_WsjWJ8e16xw/So7TjqD-bGI/AAAAAAAAAd8/sYdW24kKQ5A/s1600-h/IMG_0987.JPG"><IMG id=BLOGGER_PHOTO_ID_5372464015039425634 style="DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 400px; CURSOR: pointer; HEIGHT: 300px; TEXT-ALIGN: center" alt="" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2F1.bp.blogspot.com%2F_WsjWJ8e16xw%2FSo7TjqD-bGI%2FAAAAAAAAAd8%2FsYdW24kKQ5A%2Fs400%2FIMG_0987.JPG" border=0 closure_uid_9chugz="4"></A><BR>The complete setup, minus only an actual antenna and the headphones (which plug into the "green" connector).<BR><BR><A href="http://2.bp.blogspot.com/_WsjWJ8e16xw/So7TjauYcgI/AAAAAAAAAd0/DlQBXvNsdX4/s1600-h/IMG_0989.JPG"><IMG id=BLOGGER_PHOTO_ID_5372464010922324482 style="DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 400px; CURSOR: pointer; HEIGHT: 300px; TEXT-ALIGN: center" alt="" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2F2.bp.blogspot.com%2F_WsjWJ8e16xw%2FSo7TjauYcgI%2FAAAAAAAAAd0%2FDlQBXvNsdX4%2Fs400%2FIMG_0989.JPG" border=0 closure_uid_9chugz="5"></A><BR>Here's the schematic. Click on the image to enlarge...<BR><BR><A href="http://4.bp.blogspot.com/_WsjWJ8e16xw/So7PvHc_F-I/AAAAAAAAAds/Ht8ZhDfQbi0/s1600-h/XCVR-9V_A.gif"><IMG id=BLOGGER_PHOTO_ID_5372459813861005282 style="DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 400px; CURSOR: pointer; HEIGHT: 296px; TEXT-ALIGN: center" alt="" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2F4.bp.blogspot.com%2F_WsjWJ8e16xw%2FSo7PvHc_F-I%2FAAAAAAAAAds%2FHt8ZhDfQbi0%2Fs400%2FXCVR-9V_A.gif" border=0 closure_uid_9chugz="6"></A><BR>(Note, in hindsight, I didn't need to add C15 (which I installed as a DC block) -- the xtal will also block DC.)<BR><BR>I've had it on the air a few times -- with a 9V battery the power out is about 300 milliwatts (900 mW with a 12V battery), and I've made contacts in California and Oregon. It's a bit too small to operate the controls comfortable (given that they're screwdriver adjustment), never the less, it was a fun little project to design and build. An article describing this design in greater detail appeared in the September, 1996 issue of QRPp. It's titled, "The Everyready: a 9V Direct Conversion Tranceiver."
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<DIV class="post-footer-line post-footer-line-1"><SPAN class="post-author vcard">Posted by <SPAN class=fn>Jeff</SPAN> </SPAN><SPAN class=post-timestamp>at <A class=timestamp-link title="permanent link" href="http://k6jca.blogspot.com/2009/08/9v-qrp-transceiver.html" rel=bookmark><ABBR class=published title=2009-08-21T09:47:00-07:00><FONT color=#940f04>9:47 AM</FONT></ABBR></A> </SPAN><SPAN class=post-timestamp>
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<P><A href="http://k6jca.blogspot.com/2009/08/9v-qrp-transceiver.html">http://k6jca.blogspot.com/2009/08/9v-qrp-transceiver.html</A></P></SPAN></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV>
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a 9V battery the power out is about 300 milliwatts
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