tag:blogger.com,1999:blog-14255707499531727512012-02-15T22:24:36.150-08:00W7BAShttp://www.blogger.com/profile/12125425622625869952noreply@blogger.comBlogger21100tag:blogger.com,1999:blog-1425570749953172751.post-13933125453479235022011-05-27T06:36:00.000-07:002011-05-27T06:36:59.133-07:00<a href="http://www.signalblox.com/">www.signalblox.com</a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/1425570749953172751-1393312545347923502?l=w7bas.blogspot.com' alt='' /></div>W7BAShttp://www.blogger.com/profile/12125425622625869952noreply@blogger.com1tag:blogger.com,1999:blog-1425570749953172751.post-83826844398618326562011-02-03T21:30:00.000-08:002011-02-05T13:31:40.970-08:00Below you will find instructions and photos to guide you in performing the Improvement Mods identified by W0BA and W6OAL in the posts below. The mod is easy to make.<br /><br />1. Disconnect power.<br />2. Remove the +5V regulator VR1 from the top of the board. VR1 now becomes VR2.<br />3. ***ADDED 2/5/2011***Remove C7 (yellow 1uf Tant) and discard. Do Not Use - Tendancy to oscillate and overheat.<br />4. Solder new VR1 in mod kit (7808 Regulator) where old VR1 used to be. Same positioning as old VR1.<br />5. Turn board over. Using an exacto knife or simliar tool, cut <u>only </u>the trace identified in area indicated.<br />6. Ensure there is clean isolation, (no specs of metal shorting +V&nbsp;to gnd) on the area around the cut area.<br />7. Solder VR2 (7805 Regulator) in&nbsp;location as shown in the 2nd photo. (Straddles the cut-in-the-trace).<br />8. Make sure to solder the ground tab on VR1.<br />9. Install C17 &amp; C18 in location as shown in 2nd photo. C17 is closest to VR2.<br />10. Re-check to ensure no solder bridges or other material shorting the +V traces.<br />11. Turn board over to top side.<br />12. Remove R9 &amp; R10 (1 ohm green colored resistors)<br />13. Solder in the new R9, (1x47 ohm).<br />14. Solder in the new R10 (2x47 ohm "stacked" one on the other).<br />15. ***ADDED 2/5/2011***Ensure you remove and discard C7.<br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://3.bp.blogspot.com/_DtdOUbxmQ2M/TUuOcmQDReI/AAAAAAAAABM/4lpjJVu-6XQ/s1600/v2mod0.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" h5="true" height="239" src="http://3.bp.blogspot.com/_DtdOUbxmQ2M/TUuOcmQDReI/AAAAAAAAABM/4lpjJVu-6XQ/s320/v2mod0.jpg" width="320" /></a></div><br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/_DtdOUbxmQ2M/TUuOvmmmA2I/AAAAAAAAABQ/TbfNh0hyv50/s1600/v2mod1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" h5="true" height="239" src="http://2.bp.blogspot.com/_DtdOUbxmQ2M/TUuOvmmmA2I/AAAAAAAAABQ/TbfNh0hyv50/s320/v2mod1.JPG" width="320" /></a></div>That's it. I will send a mod kit to any purchaser who sends me an email and requests one, free of charge.<br />Mod kit will include all new parts needed as well as an extra 7805 in the case the original is damaged trying to remove it.<br /><br />73's,<br /><br />Bruce<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/1425570749953172751-8382684439861832656?l=w7bas.blogspot.com' alt='' /></div>W7BAShttp://www.blogger.com/profile/12125425622625869952noreply@blogger.com0