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I just finished the CW mods and I am seeing the same issue that John, WA2FZW had. ?

1) When the press PTT in LSB mode the Rig goes into TX and I am getting full power out on voice peaks but the PTT is locked at this?
point and the rig needs to be power cycled to recover.

2) With a key plugged into the key jack, on key down I am getting sidetone and indication of CWL TX but no power out.
? ? Originally I was thinking that it might be that the 10K resistor in the CW-Carrier Mod might be too large, but I am now thinking that
perhaps I should?sort out the first issue as maybe I am not really going into TX on CW (i.e. maybe all of this is a problem with the TX-RX Line modification).?

FWIW, I am still on Raduino V1.14.1 and I have checked the orientation and wiring of the transistor that I a using for the TX-RX line mod
(I am using a 2N3904).?

My first thought is to replace the transistor but I am open other suggestions. ?

Cheers

Michael VE3WMB?

On Fri, June 23, 2017 17:27, Michael Babineau wrote:

1) When the press PTT in LSB mode the Rig goes into TX and I am getting
full power out on voice peaks but the PTT is locked at this??
point and the rig needs to be power cycled to recover.

Michael,
please verify the transistor connections. Switching emitter and collector
causes exactly the behaviour you describe: Once the transistor is opened
it will remain open forever until power off.

An other possibility is that the transistor if faulty (check with
multimeter).

73 Allard PE1NWL

Allard thanks for the suggestion, unfortunately I have run out of debugging time until Sunday as I am headed out of town.
?
It occurred to be that if I disconnect the TX-RX mod from the PTT jack, this should help to diagnose both problems.

Without the TX-RX mod, if I get power out on CW by exerting manual PTT, while the KEY is closed then I know for sure that
that issue 2 (no power out on CW) is because of issue 1. And if the PTT action works fine on SSB without the
TX-RX mod connected then it is pretty clear that there is a problem with transistor I am using for the TX-RX mod.?

I'll let you know what I find out when I can try this, so that hopefully if anyone else encounters this issue they will be able to resolve it quickly.

Cheers

Michael VE3WMB?

On Fri, Jun 23, 2017 at 08:27 am, Michael Babineau wrote:

I just finished the CW mods and I am seeing the same issue that John, WA2FZW had. ?

Michael, Don't know if you saw my last post in the other thread, but I did reconnect the TX-RX line transistor as described in the sketch, and it worked.?When I connected it the first time, I too had the lockup problem (not sure I mentioned that in the other thread) and like you, had to power cycle the rig.

I'm pretty sure I probably installed the transistor backwards or maybe I fried it in the process of soldering it in, but I took extra care this time; even breadboarded it?first. Everything works properly now! I'm using a BC546C transistor.

?
--
John - WA2FZW

Ok I had some time today to do some debugging on my "TX/RX lockup issue" and the presumably related "no output on CW".

I lifted one leg of the 2N3904 that I am using for the TX/RX mod and tried using PTT in LSB and it worked fine (no lockup).
I also tried closing the PTT and the CW Key?and I am getting 5W CW out into a dummy load so obviously the issue is with the TX/RX mod. ?

Rather than attaching the transistor to the?PTT jack I chose to build the circuit with the 4.7K resistor and the 2N3904 transistor on a small piece of
single-sided PCB?using "Manhattan-style" building with MEpads from QRPME (). ?What I didn't realize is that I had inadvertently
soldered the wires connecting to the?collector and emitter to the wrong connections on PTT jack. Normally that wouldn't matter (it's just a jack) but it also connects to the PTT circuit on?the main board and that has positive and negative wires and I got it wrong. ?So in this case the end result was exactly as if I had the transistor orientation backwards (even though it wasn't physically, it was electrically), ?which?is what Allard suggested the problem was. ?

Many thanks for the help. ?

Cheers

Michael VE3WMB?