<div dir="ltr">I mean series PTT as similar to some radios (Motorola and ICOM) where the PTT closes the mic circuit, rather than a separate PTT signal line. I've never had any programming cable continually key the Baofeng radio's transmit function, using any of those Baofeng-supplied cables, a genuine Kenwood KPG-22U, or a DE9-2.5/3.5 homebrew cable I made in the past. Only the momentary TX key when inserting or when not fully inserted. Looking at the same link, there's a dual PTT function for the radios which may be a culprit. Testing by setting A or B specially in CHIRP when writing might show that the PTT is changing to the other displayed channel and transmitting. <div>
<br></div><div>According to the cable schematic and your interpretation, its possible for the cable to key the radio. I'm not disagreeing with that, nor that your cable is indeed causing the PTT to key. I'm not familiar how the radio's PTT circuit chooses to ignore serial data, but I'm only claiming I haven't experienced the behavior even in an edge case with validation/programming of large numbers of these.</div>
<div><br></div><div>An interesting side note is that one of the radios would phantom switch from displayed channel A to B bacn and forth a few times when programming, and also would indicate RX audio broke squelch when programming . This was only with a certain Baofeng cable, not the KPG-22u nor any other specific cable.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Mar 27, 2014 at 11:55 AM, Stephen Hersey <span dir="ltr"><<a href="mailto:n1xnxham@gmail.com" target="_blank">n1xnxham@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><div><div><div><div>Incorrect wiring? I'm afraid I find that a bit hard to believe. I've traced the circuitry on the adapter, and have compared it to the reference at <a href="http://www.miklor.com/UV_Technical.php" target="_blank">http://www.miklor.com/UV_Technical.php</a> and I've found the following:<br>
<br></div>1) The TX, RX, and ground lines are wired to the proper places on the twin plug (data to radio on sleeve of 3.5 mm plug, data from radio on ring of 2.5 mm plug, ground on sleeve of 2.5 mm plug<br></div>2) No other plug connections are present.<br>
</div>3) The data out to the radio is through a common-emitter NPN to ground with a 20K pullup to +5V. This last item might be questionable, as most other circuits I've seen are either pulled up to 3.3V or are left open-collector. Removing the pullup resistor didn't change the PTT keying behavior, BTW.<br>
<br></div>I'm not sure what you mean by "does not have a series PTT (its the sleeve on the 3.5mm)"; as I understand the diagram at miklor, the PTT line is also the serial data line into the radio. Can you clarify? <br>
<br></div>Thanks,<br>Steve<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Mar 27, 2014 at 2:35 PM, Niklas Johnson <span dir="ltr"><<a href="mailto:niklas@ruggedradios.com" target="_blank">niklas@ruggedradios.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">The cables my company got from Baofeng directly when buying a few hundred private labelled UV-5Rs do not keep the radio keyed when inserted or reading/writing. It keys it momentarily when plugged in, but it should not when fully inserted. It does not have a series PTT (its the sleeve on the 3.5mm), so your cable is incorrectly wired. Additionally, the cables we purchased were counterfeit Prolific chip-based so they required the older 3.2.0 driver (sourced from Miklor). <div>
<br></div><div>--Niklas<br><div><br></div><div><br></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div>On Thu, Mar 27, 2014 at 11:08 AM, Stephen Hersey <span dir="ltr"><<a href="mailto:n1xnxham@gmail.com" target="_blank">n1xnxham@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div><div dir="ltr"><div><div>
<div><div>I've just started using Chirp with a Baofeng UV-5R and a USB serial adapter that Amazon claims is from Baofeng. The adapter has a genuine Prolific chip (or a darn good counterfeit), and Windows 7 Pro 64-bit recognizes it as a serial port; in addition, I can connect TxD to RxD at the radio plugs, open PuTTY, and see looped-back characters I have typed on the console. So far, so great.<br>
<br></div>However, neither Chirp nor baoclone could open the serial port the USB adapter was assigned to: COM19. Hmmm, 19? Sounds way high for a serial port enumeration. I reassigned the USB adapter to the vacant COM2, and hey presto! Both utilities are able to talk to the radio. <br>
<br></div>Sooo, beware of high-numbered COM ports.<br><br></div>Incidentally, is it normal for the UV-5R to key up when the serial cable is present? I'm going to make a practice of always having a dummy load connected when programming this radio. <br>
<br></div>Regards,<br>Steve<span><font color="#888888"><br clear="all"><div><div><div><div><div><br>-- <br>Steve Hersey N1XNX <br><a href="mailto:n1xnxham@gmail.com" target="_blank">n1xnxham@gmail.com</a><br>-----<br>
Each of us has strengths and talents that others don't. Whether innate or learned, these are gifts -- and a gift not shared is a sad and lonely thing. Using our gifts for the benefit of all is an ethical obligation for every intelligent being. (The magic only works if you pass it on!)<br>
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<br></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><br>-- <br>Steve Hersey N1XNX <br><a href="mailto:n1xnxham@gmail.com" target="_blank">n1xnxham@gmail.com</a><br>-----<br>Each of us has strengths and talents that others don't. Whether innate or learned, these are gifts -- and a gift not shared is a sad and lonely thing. Using our gifts for the benefit of all is an ethical obligation for every intelligent being. (The magic only works if you pass it on!)<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><p>Best regards, </p><p>Niklas Johnson / Tech<br> Rugged Radios<br> 951 E. Grand Avenue<br> Arroyo Grande, CA 93420<br> toll free (888) 541-7223 <br>
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