Apache Labs Community Forum

Hi,

When using piHPSDR on my Anan G2 ultra doing SSB, I notice that releasing the PTT is slow. What I mean by this is I'm having a conversation with someone, I key down and say what I'm going to say, then release the mic key. It takes much too long for the radio to switch back to RX. I actually miss the beginning of the response from the person I am talking with. I do not have this issue with Thetis.

Is there a setting somewhere for this?

Joel

I just tested this with my Ultra. Using the rear TRS connector for my microphone and a separate PTT switch, I don't notice any delay going from transmit to receive when I release the PTT button.
Which microphone are you using? Are you using the front panel microphone connection? It could be the PTT switch in your microphone sticking. I looked through the manual and the transmit settings and I don't find any kind of delay setting for PTT.
James
WD5GWY

Interesting, I'm using an Inrad M629 mic on their stand connected to the rear TLR and the PTT to the rear mic jack. It's the same mic whether I using piHPSDR or Thetis.

Perhaps it is un keying right away, but the audio is taking a moment to come back. I'm constantly missing the first works coming back. I haven't tried the rear PTT in yet, it looks like its a different path than the PTT signal on the mic jacks.

I use a stereo splitter cable with female RCA connectors on each side of the split. That way I have PTT in for my handheld PTT switch and the other for PTT output to Key an amplifier.
Here's the wiring diagram from the manual showing how wire the stereo plug if you are only interested in using one or the other. James
WD5GWY

I tried the 1/8 mic jack and now also the RCA PTT in, and MOX switch, all behave the same. Listening more closely, it does un-key fast enough, what I'm getting is what sounds like a static crash each time I release the PTT. Its long enough that I miss the beginning of someone talking.

Again, this does not happen with Thetis, same mic connections.

Saying RCA in isn't quite complete, I also have a pigtail that takes the 1/8 jack and splits it to two RCA, PTT out I have been using with my amp. I tried the other for PTT in, same issue.

Joel1 wrote: Sun Oct 12, 2025 11:57 pm Interesting, I'm using an Inrad M629 mic on their stand connected to the rear TLR and the PTT to the rear mic jack. It's the same mic whether I using piHPSDR or Thetis.

Perhaps it is un keying right away, but the audio is taking a moment to come back. I'm constantly missing the first works coming back. I haven't tried the rear PTT in yet, it looks like its a different path than the PTT signal on the mic jacks.

It may be how things are wired. Note also that all PTT inputs on all connectors are tied together internally, there is no difference between inputs.

A wiring diagram showing each connector and each pin and what signal goes where that would help determine if improper wiring is the issue. It doesn't have to be fancy, just scratch it out on a piece of paper and post a pic of it.

We can reduce it to the lowest common denominator, No PTT wire attached, XLR plugged into mic, TLR plugged in G2, MOX button to key, does not matter if it is the hardware MOX on the panel or the software MOX on piHPSDR. TLR tip, ring, and barrel wired per the manual.

Any chance of:

1 Squelch is on. Turn it off if so.

2 Receive AGC not on fast enough setting to recover quickly on ptt release ? Both AGC type Fast, slow, normal and agc level set by slider and shown as a horizontal line on the spectrum display. If set to auto agc try setting to normal or fast as a test.

TLR? You mean TRS, tip/ring/sleeve?

I'd still like to know the wiring of the XLR to TRS cable.

Y, TRS.

Tip is mic plus, ring is mic -, barrel is gnd. XLR pin one in gnd, pin 2 is mic+, pin 3 is mic-.

Again, this all works fine with Thetis.

Attached are two short videos

Squelch is off. I did play with different AGC speeds, no change

KA1GXR wrote: Mon Oct 13, 2025 7:22 pm Any chance of:

1 Squelch is on. Turn it off if so.

2 Receive AGC not on fast enough setting to recover quickly on ptt release ? Both AGC type Fast, slow, normal and agc level set by slider and shown as a horizontal line on the spectrum display. If set to auto agc try setting to normal or fast as a test.

Joel1 wrote: Mon Oct 13, 2025 9:58 pm
Tip is mic plus, ring is mic -, barrel is gnd. XLR pin one in gnd, pin 2 is mic+, pin 3 is mic-.

Thanks!

A few more points of clarification:

- Are you using the "XLR" connector on the back of the G2, or the "MIC" connector?

- You had posted that you were using the Inrad mic and base. It sounds like you are not using the base, but going direct from the mic XLR. Is that correct?

There is no XLR on the back, it's mis labeled. The XLR is on the mic, The radio has the TRS. I am using the TRS, so the balanced mic input. I actually tried another mic I have that uses the front mic jack, same issue.

The mic goes straight to the TRS on the back, the base goes to the PTT in on the back.

Joel1 wrote: Tue Oct 14, 2025 12:32 am There is no XLR on the back, it's mis labeled. The XLR is on the mic, The radio has the TRS. I am using the TRS, so the balanced mic input. I actually tried another mic I have that uses the front mic jack, same issue.

The mic goes straight to the TRS on the back, the base goes to the PTT in on the back.

Yeah, the way they labeled that connector is awful. It should have been labeled "BAL MIC IN" or similar.

It sure seems like a piHPSDR problem. You're videos show the behavior quite clearly.

@laurencebarker -- any ideas, Laurence?