<div dir="ltr"><div><div><div>The MAX232 method is likely gonna be picky as heck unless there's a constant power source available. You can use the DTR line on the serial port but on some systems this isn't driven with enough current.<br><br></div>That being said, this is what I've used.<br><br><br></div>I just tossed a 2N2222 and 2N3904 in there as the PNP and NPN transistors. Never fails.<br><br></div><br><a href="http://www.kc8unj.com/opc478.gif">http://www.kc8unj.com/opc478.gif</a><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 2, 2015 at 8:53 AM, Steve Whitehead <span dir="ltr"><<a href="mailto:nv7vham@gmail.com" target="_blank">nv7vham@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif"><div class="gmail_default" style="font-family:tahoma,sans-serif">Turns out it looks like most of the CP2102 USB adapters are 3.3V output. Specifications for<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">TTL logic is 5V. I have ordered a CP2102 that has both so we'll try that and see what<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">happens.<br><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">In the dim times (when we used a kerosene lamp to illuminate our computer screens) a common<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">practice was to use a Max232 to convert RS232 levels to TTL for programming radios when you did<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">not want to purchase a $40 cable from RT systems. It was often hit and miss if the radio would work<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">because the levels were sometimes not quite right.....<br><br></div>Should have the different CP2102 this week and report back.<br><br>>Thanks for the response Jim. I wish it as easy as finding a short.<br>
> I have three of the converted 6-in-1 cables and the behavior is the same.<br>
>I will keep playing with it. I did not order the cheapest available <span>CP2102</span><br>
>available from China and notice there are several different styles.<br>
>Perhaps this one is somehow different in levels or buffering from the<br>
>others. I have read online others have had success programming the<br>
<span>>FT</span>-<span>60</span> with the <span>CP2102</span> so something is different. One thing of note is<br>
>this is one of the CP2102s that John said has the TXD and RXD switched.<br>
<br>
>On Fri, Oct 30, 2015 at 8:25 AM, Steve Whitehead <<a href="mailto:nv7vham@gmail.com" target="_blank">nv7vham@gmail.com</a>> wrote:<br>
><br>
> I have been using one of the 6-in-1 programming cables with the<br>
counterfeit<br>
> Prolific chip in it. After reading John Miklor's article about using the<br>
> <span>CP2102</span><br>
> in place of the Prolific counterfeit I replace the chip with the <span>CP2102</span>.<br>
><br>
> The cable works perfectly with the UV-5R radios but no longer works with<br>
the<br>
> Yaesu <span>FT</span>-<span>60</span>. It is the same with my MacBook Pro or if I use <span>FT</span>-<span>60</span><br>
> commander.<br>
> I thought before I start spending several hours chasing this down I would<br>
> ask<br>
> if anyone else has run into this.<br>
><br>
> Thanks,</div><span class="HOEnZb"><font color="#888888"><br clear="all"><br>-- <br><div><div dir="ltr"><div>Please note new e-mail address<br><br></div><a href="mailto:nv7vham@gmail.com" target="_blank">nv7vham@gmail.com</a><br></div></div>
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