ANAN-8000 - Rear speaker out L-R

DL5RBW
Posts: 41
Joined: Tue Sep 25, 2018 5:37 pm

ANAN-8000 - Rear speaker out L-R

Postby DL5RBW » Mon Oct 14, 2019 6:59 am

After using a single passive speaker connected to the 6,35 mm SPKR Right connector on the back I just finished to fabricate 2 passive (8 ohms -15 W) speakers to connect them to the rear panel 6,35 mm SPKR Right & Left TRS sockets. I expected to be able to put RX1 on the left speaker and the SUB RX (with Multi RX enabled) or RX2 on the right speaker, vice versa or anything in between by shifting the sliders. Both speakers are working fine individually and are wired correct (speaker terminals to Tip and Ring) however if for example on Multi RX I can hear both signals Main RX and Sub RX with both Pan sliders centered - that´s fine. If I push one or the two sliders to the left nothing changes and both RXs can be heard on each of the both speakers. If I shift them to the right the corresponding receiver mutes. If I shift both sliders to the very right all is muted.
However if I use the headphones plugged in on the frontpanel all works as expected and for example in Multi RX mode I am able to put the Main RX to the left ear while having the Sub RX in the right ear or mixing them .

I found some information here

viewtopic.php?f=12&t=2744&p=5086

but the information there was mainly referring to buzz or the proper connection to the TRS connector.
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w-u-2-o
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Re: ANAN-8000 - Rear speaker out L-R

Postby w-u-2-o » Mon Oct 14, 2019 11:43 am

My best guess is that your ANAN is incorrectly assembled such that both speaker outputs are wired to the left channel amplifier output. You will have to look inside and see how it is wired, or send it back in for service.
DL5RBW
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Re: ANAN-8000 - Rear speaker out L-R

Postby DL5RBW » Mon Oct 14, 2019 9:41 pm

Sounds funny but I will check it out tomorrow.

Thanks!

73/Roger, DL5RBW
DL5RBW
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Re: ANAN-8000 - Rear speaker out L-R

Postby DL5RBW » Tue Oct 15, 2019 9:16 am

O.k. - here is what I found:

On the ORION board are 2 sockets "J8 & J9" for Left & Right audio respectively. The situation that I already saw on the board layout schematic was confirmed by checking the cable jumpers. There is only ONE jumper connecting J8 (Left Audio output) on the ORION board to J8 on the SPREADOUT CARD where both speaker sockets (J7=Left Speaker, J9=Right Speaker) obviously are "hardwired" in parallel. There is no J9 receptacle where one could connect J9 (Right Audio output) from the ORION board to J9 on the SPREADOUT CARD where it would be connected to J9 (R Speaker) exclusively.

Is there any special reason for paralleling both rear speaker outputs to the Left Audio output on the ORION board? The TPA0202 chip is capable of driving two loads individually - at least on the ORION board provision has been made for separate Left & Right audio AND the circuit diagram reflects the correct version - Left Audio output on the ORION board connected to the rear L(eft) speaker jack and Right Audio output on the ORION board connected to the rear R(ight) speaker jack.

Maybe mine is an old revision SPREADOUT CARD with still both speaker jacks connected in parallel to one audio output on the ORION board. Otherwise it would mean nobody else ever hooked up two loudspeakers and played around with it. Other than that the only solution would be to cut the traces for the Right Speaker on the SPREADOUT CARD and connect the Right Speaker jack to J9 on the ORION board. Whether this will establish the mixing possibilities and the binaural hearing on the speakers like I am used to with the headphones I am not sure as the audio for the headphones uses a different route. Maybe a temporary connection of one of the loudspeakers to J9 on the ORION board may tell whether the "mixing" works. If I understand it right the "mixing" has to be done elsewhere in the DSP as the TPA0202 is an audio amplifier only. The "mixing" in the DSP may work however if one of the two output channels is missing it is hard to say.

This refers to the ANAN-8000. I don´t know whether the ANAN-7000 for example is different in layout.

It would be nice if other ANAN-8000 users and maybe ANAN-7000 users too could confirm or reject this situation - either by giving it a try or by checking the wiring. The ANAN is userfriendly and easy to open up. Just be careful to not pull away the bottom cover with verve as you would likely break apart the 12 V cable of the blower.
Helmut
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Re: ANAN-8000 - Rear speaker out L-R

Postby Helmut » Tue Oct 15, 2019 12:06 pm

Hi Roger,

some 7000 have the cable wrong - may be on your 8000 also ? Only a guess .....

See
https://www.youtube.com/watch?v=erxw5c-lpYw

73 Helmut
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w-u-2-o
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Re: ANAN-8000 - Rear speaker out L-R

Postby w-u-2-o » Tue Oct 15, 2019 1:08 pm

Roger,

Bottom line up front: try moving that cable from Orion J8 to Orion J9 and see what happens.

In more detail...

I have an 8000. I have never used the speaker outputs, or any audio input or output because I use VAC exclusively and because the hardware is located in a rack in the basement, not at my operating position in my second floor office studio. Thus it is not easy for me to compare results.

However...

On the schematics I have I see the following connections:

1. Right speaker audio output comes from Orion J8 pins 1 and 2 and also Orion J16 pins 14 and 15.
2. Left speaker audio output comes from Orion J9 pins 1 and 2.
3. Spreadout J9 (I don't know if it's marked left or right on the rear panel) is connected to Orion J16 pins 14 and 15.
4. Spreadout J7 (I don't know if it's marked left or right on the rear panel) is connected to Spreadout J8 (and not paralleled with Spreadout J9) which is presumably connected to Orion J9.

Leaving aside the issue of left/right reversal, which really doesn't matter so much, it would seem that it may be as simple as plugging the cable that comes from the Spreadout (I hate that name, it should be "breakout") card into Orion J9, instead of Orion J8 where you report it is now. This is also supported by the photos shown in the video link that Helmut posted, which also show the cable plugged into Orion J9.

73,

Scott
DL5RBW
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Re: ANAN-8000 - Rear speaker out L-R

Postby DL5RBW » Tue Oct 15, 2019 6:21 pm

Hi Helmut & Scott,

thanks for your replies - I still had the radio open on the "autopsy desk" and shifted the jumpercable from J8 to J9 (on the ORION board). Not really expecting any difference other than R and L being reversed I assembled the radio again and hooked it up in the operating position.

First test was BINAURAL and yes - the effect was there! Also mixing the two audio signals now is working fine so this was a 100% hit!

Still don´t understand why it is working now but now there is plenty of time to study the circuit diagram again although you seem to have a more complete package of schematics as I am missing a schematic of the "SPREADOUT CARD" completely - maybe I have to check the .pdf as it seems with printing some parts of the schematic were cut off.

Thanks for the excellent support and bringing the radio one step closer to perfect!

By the way on the rear J7 on the SPREADOUT CARD is labelled "L Speaker" and J9 is labelled "R Speaker". However the labelling is incorrect but simply hit "Swap" in the menu or place the speakers accordingly

73 Roger, DL5RBW

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