Anan G2 no front Distorted audio only 15 meter band

[Svante]

Hi all. First time here and new to Anan. Using Focusrite with Rode Podmic. (I have used this in about 3 years to my Sunsdr2 dx). My setup works with good Audio except for 15 meter. I am using my old Icom 718 for listen. And also get report from other Hams on the band. It is only 15 meter it is not possible to make a qso. The tranceiver is new since about 2 months. But Had my antenna down under summertime. So now up and running about 3 weeks. The problem is also when using Dummyload so it is not antenna issue. 80 to 10 meter works except for 15 meter. I will setup my Sunsdr again to see what happens. But is there a chans it is something inside tranceiver just working with 15m band audio. The audio is good when speaking/listen with the monitor but not out on the air.
I am not the guy who knows how a tranceiver works inside the box.
Svante sm6usu
ps sorry for my english

[Svante]

Hello again I have now tried with another microphone interface Same issue. I have found that I can transmit under 30 watt and that works. But at 30 watt it start funny sounds on my voice in my listening radio (Icom 718) If I change to 17 m band no problem at all 70 watt no problem. All this is with my dummyload. If I use my rf2k-s amplifire It is still the same using 10-20 watt on Anan give me maybe 300-500 watt out from RF2K whitout distortion.
Someone has a clue?
Svante sm6usu

[rsaue]

Hello again I have now tried with another microphone interface Same issue. I have found that I can transmit under 30 watt and that works. But at 30 watt it start funny sounds on my voice in my listening radio (Icom 718) If I change to 17 m band no problem at all 70 watt no problem. All this is with my dummyload. If I use my rf2k-s amplifire It is still the same using 10-20 watt on Anan give me maybe 300-500 watt out from RF2K whitout distortion.
Someone has a clue?
Svante sm6usu

Hi Svante,
Have you tried to make a qso with a local ham on 15 meters to get a modulation report from a RX site that is not your own 2d radio in the same shack?

Good luck!

73 de LB2EG Richard

[Svante]

Hello Not Local but when trying to contact in a pilup several stations report very bad audio. If I try to explain my bad audio it is lag talking under water and quick signals like vining About the same you can have with wrong buffer or similar. I am working on it now but can not go over 22 watt the it starts. And it starts at about 18 800 to 22 000 over and under that is no problem so for me it is all over the 15m band 17 m no problem 12 m no problem As soon as I hit 22 watt on the Anan tranceiver it starts It is not a normal distorsion it is other type extra audiosignals not echo like bubbles or how to discribe it. Othervise I get very good, perfect to excellent audio from stations on other band whitout asking them. It is no different with or without cmASIO or different Microphon interface. Maybe try to install the tranceiver on my Laptop. My computer I use is about one year old and custom made for me and video editing in 4K. 64gbit ram Windows 11
Regards Svante sm6usu

[oe3ide]

Most likely RFI.
Try some ferrits on mic/usb cables.

73 de Ernst, OE3IDE

[Svante]

Hello Ernst I already have model 31 ferrites on mic cable and also to speakers They help vey much but I dont belive this is the case this time I run only max 22 watt when it starts. I can have my amplifire on the line to and produce 3-400 watt as long as I not go over 22 watt on 15m band All other bands have nothing like this. Just 15m. I have no problem with 100 watt If I want to on the other bands. I earlier run my sunsdr 2 dx with same setup No rfi problems att all. But I do not know if it maybe my computers soundcard not working. But I doubt because everything else works perfect also monitoring my 15m band when transmitting. It seems to be what comes out from the Anan after about 22 watt on the air. But okay I have one more 31 ferrit ring so I will try that.
Regards Svante sm6usu

[Svante]

It did not work with more 31 model ferrites. I have also found that tuning with about 30 watts gives the same type of bad signals. So even if it is rfi I have not found it.
Svante sm6usu

[Svante]

Hello all again Today I did setup my Sunsdr tranceiver for a compairing test on 15m band Sunsdr to dummyload 100 watt no problem at all sounds
fine.
Anan G2 sounds fine to 15 watt and over 20 watt terrible. Same focusrite interface and microphone on both stations and also same computer.
So I can use Anan on 15 meter with 15 watt to my rf2k-s and get out about 500-570 watt. But it still only works up to 15 watt on 15m band.
So I will contact the seller and hope he finds the problem.
Regards Svante sm6usu

[KA1GXR]

Maybe a bad bandpass filter .

[echo_india]

Hi Svante,

How are you connecting in to the Anan? If using the TRS 6.3mm input, some ops including myself have had or do still have this issue and the problem for the most part is not RFI on mic leads as some would leave you to believe here. But is an issue with the radio itself which I thought they would have addressed by now!

I guess they are busy focusing on getting FCC compliant these days.

[SA3ATF]

Hi Svante.
Sorry to hear you are having problems.
Tried other cables etc. I guess you already did, but I Just wondering if you tested the microphone straight into the radio without Interface and maybe another mic?
Might be worth a try.

Good luck regardless.

[Svante]

Hello all. I tried to make a Youtube video to explain my problem.
This is with my Anan G2.
It is ONLY on 15M band. and ONLY ABOVE drive level about 15 (15 Watt)
In Monitoring the Audio is fine.
When Listen on the AIR in my ICOM 718 it is terrible

https://youtu.be/DkhKMWfNqVs

I have tried different Mic Interfaces.
Different cables.
Dummload or antenna No audio differens.
cm ASIO with or without.
PS with or without.
Different settings in audio levels on Thetis and Microphone interfaces and so on.
My Sunsdr2 dx Yippppy No problem with the same external equipment.
I have NOT trying to change the numbers on filters or whatever because I have not the knowledge
sm6usu Svante

[dl4zbg]

- did you perform the power adjustment on 15m correctly (Drive 100 = abb. 100 Watts)?
- did you try filtering on the DC leads?

[Svante]

Hello. I have now try to relocate the tranceiver from the powersupply. Did not help.
I hade a 31 modell ferrite ring and try to place it near tranceiver and also near powersupply. Did not help
I also wind upp coax output cable to the Ferrite Did not help
I have try to setup the Drive slider to show 100 % when powermeter shows 100 watt.
Still when drive slider goes over 30 % The crackling audio starts. It was not any difference whatever I
try to do.
I have set my maxpower to 16 watt on 15m band and that works with my amplifire to about 500-600 watt pep.
But That do not solve the problem. I can not use 100 watt without the amplifire if I want to.
I have sent the Video to the dealer in England.
So I guess I have to wait and see what they say
sm6usu Svante

[laurencebarker]

Please tell us which microphone connector you have used. There are 3: a 3.5mm on the front and rear panel, and a 6.3mm on the rear panel.

The 6.3mm on the rear panel is connected to a balanced preamplifier. Early versions of the radio had problems with that preamplifier, but Apache Labs has redesigned the preamp to eliminate that problem. I assume it is a new radio you have; if it is older, it could still have the original PCB.

There is a description somewhere in this forum of a potential DIY modification to that preamp to eliminate the problem, too.

[Svante]

Hello It is new. Bought it 19 july this summer. I am using a Focusrite version 4 interface to usb on my computer. Computer and Anan is by Ehternet cable. I have also used my Behringer UM2 interface no difference. Microphone is a Rode podcaster. Everything works excelent except for 15 m
Using my Sunsdr same setup no problems at all, same interface same power supply same location 3 years now. Except for the Focusrite wich is only 10 days old. I have only my antenna up now for about 3 weeks (Have it down every year in summer months) so I have not used my Anan the first 1,5 months more then to my dummy load to try to learn and setup Thetis. Now I am using it mostly everyday together with my amplifire. But all test about this problem is without Amplifire. Just dummy load and sometimes to antenna but the problem is there no matter what.
Regards sm6usu Svante

[K1LSB]

Another idea, try the two-tone generator (or one of the other test signals) in Thetis, that may give some insight as to whether the distortion is coming from the mic audio stream or not.

Mark

Edit: Good grief, that's a horrible picture, sorry!

Test Signal Options.jpg (4.74 MiB) Viewed 16495 times

[Svante]

Ok But I am not sure how to work with that and what to look for?
Svante sm6usu

[K1LSB]

The Transmit Mode pull-down list gives you the various test signal options, which will be transmitted whenever you operate the PTT.

The "Radio" option is the normal mode of operation (i.e., any transmitted signal will come from your mic audio input). All of the other options are various test signals that can be generated and transmitted by Thetis. The numeric fields are variables you can adjust for the different test signals.

Connect your radio's TX antenna to a dummy load and just play around with the test signals, you should quickly get a handle on how it all works. The test signal should transmit when you press your PTT switch.

The Tests tab is explained somewhat summarily in Section 6.10 of the Thetis User Manual.

Remember to select the "Radio" option when you're done, so your rig will function normally again.

Mark

[Svante]

Ok will try the today. Thank you.
sm6usu Svante

[Svante]

Hello again With Microphone and usb interface Disabled. Using Tone mode tx in test. The distortion start with drive level about 26-31. Mic level on screen set to 0 db. Drive level 100 % backing Miclevel to about -18 also start Distorion Level above or under I can not here distortion. In Radio mode It starts With my modulation Drivlevel about 22% and up to 100% So I guess the Microphone and interface is not part of this. It was unplugged from Computer under Tone test. I have changed usb cable and usb ports also but of course no change.
sm6usu Svante

[echo_india]

Early versions of the radio had problems with that preamplifier, but Apache Labs has redesigned the preamp to eliminate that problem. I assume it is a new radio you have; if it is older, it could still have the original PCB.

Wow! Who would have known. Are they going to make available the updated preamplifier board for earlier rigs?

[w-u-2-o]

Hello again With Microphone and usb interface Disabled. Using Tone mode tx in test. The distortion start with drive level about 26-31. Mic level on screen set to 0 db. Drive level 100 % backing Miclevel to about -18 also start Distorion Level above or under I can not here distortion. In Radio mode It starts With my modulation Drivlevel about 22% and up to 100% So I guess the Microphone and interface is not part of this. It was unplugged from Computer under Tone test. I have changed usb cable and usb ports also but of course no change.
sm6usu Svante

Now that the entire audio chain has been ruled out, perhaps it is some sort of interference on the Ethernet connection between the PC and the ANAN.

One way to test this would be to add a display, keyboard and mouse to the G2 and see if the same problem occurs with piHPSDR running on the internal Pi processor.

[Svante]

Hello and god morning (Sweden). Ok I understand. So far I have relocated the Anan and reroute the Ehternet cable no change. Yesterday the shop in England called me so I think I will wait to hear what they have to say.
Today I am not at home so no work with that problem today. Is there bluetooth posibilitis with the internal setup? Because I use only bluetooth keyboard and mouse to my PC (Have no cables for keyboard and mouse)
Regards Svante sm6usu

[w-u-2-o]

I don't have a G2, but the photos show a Wi-Fi connector on the back, so it's assumed the Pi CM4 processor comes with Wi-Fi and Bluetooth.

However, in order to add the Bluetooth devices to the Raspian OS configuration you have to have a way to configure Bluetooth services. The easiest way is to use a wired mouse and pick on the Bluetooth configuration icon on the Pi desktop menu bar. But you don't have a wired mouse, so...

Here's a video on how to do it from the command line. You will need to SSH into the Pi from your PC (I like MobaXterm for this, or you can use Putty).

[grolaf]

Hello,

I can confirm the same issue on my G2 black face (04/2024). More than 25W output on 15m = audio is badly distorted. It happens if operating standalone with pihpsdr, too. No difference with antenna or dummy load, directly connected to ANT1.
Distortion can also be heard if using "Two Ton"e and increasing power using the slider.

I'm located in Germany, so no idea where I can send my trx for repair.

If there is be an easy fix (i.e. rerouting cables), I would rather try that on my own. Any advice?

[n6mud]

I fixed the audio issue on 15M by adding 3 type 31 ferrites circled in red.

IMG_0105.jpeg (673.24 KiB) Viewed 10970 times

[w-u-2-o]

I fixed the audio issue on 15M by adding 3 type 31 ferrites circled in red.
IMG_0105.jpeg

Interesting.

Do you have any more photos of the G2 internals?

[n6mud]

All I have. That would be enough to fix the issue at hand. 5 min fix. Takes longer to take off the cover than apply the ferrites.

[grolaf]

@n6mud many thanks! Adding the ferrites fixed the audio issue for me. I can now run 100% drive on 15m without audio distortion