Remote relay volume control kit.

[Antonio]

Display Problem

DipChip Gentlemen, there is something wrong with your E-mail I'm sending this message for the third time I hope to recive an answer,
Regards

Antonio

----- Original Message -----
From: Antonio Ruggiero <antorugg@libero.it>
To: Dale Herman <dale-herman@charter.net>
Cc: Craig Beiferman
Sent: Wednesday, October 29, 2003 7:30 PM
Subject: display problem


> Dale,
> Maybe, you have not ricived the message that I sent you 2 days agoo, or
> maybe I have not recived your answer.
> I'm sending you the message again,
> regards,
>
> Antonio
>
> ----- Original Message -----
> From: Antonio Ruggiero <antorugg@libero.it>
> To: Dale Herman <dale-herman@charter.net>
> Cc: Craig Beiferman
> Sent: Monday, October 27, 2003 7:37 PM
> Subject: R: display problem
>
>
> > Dale,
> >
> > If you really think that the display is broken, you can send me a new
> one.
> > My addrss is:
> >
> > Antonio Ruggiero
> > Via Marconi 66
> > 80040 Pollena T. (NA)
> > Italy
> >
> > Regards,
> > Antonio

 

[harvardian]

Antonio,

We are sending you a new display to the address listed.

Best Regards,

Dale

 

[grataku]

Peter,
I don't know, since the ears work in dB the greater adjustability will always be felt more at lower volumes.
I find myself listening to background music while doing other stuff and the nonlinearity of the original table didn't suit my needs.

 

[Antonio]

Display Problem

Thank you Dale for your kindness and professionality,
Best regards

Antonio

 

[Peter Daniel]

It is very personal issue of course. For instance, I'm using my control in the last quater of the turn only and I can easily detect 1dB changes from max volume and I'm using that small increments quite a lot. Rearly the music is in a background. Probably the best way to figure out the best setup is to use detented pot and play with it for a while, noting the critical settings and then measure it in dBs to see what is really needed.

 

[Coulomb]

Re: Display Problem

Thank you Dale for your kindness and professionality,
Best regards

Antonio

To be fair Antonio, Dale did respond to your last email several pages back. Conversation has been brisk on this forum, you may have missed it.

 

[Coulomb]

OK who has some thoughts on putting the APOX 1 before or after my SOBOZ preamp?

Anthony

 

[Peter Daniel]

With 5k impedance, I would rather put it after the preamp.

 

[harvardian]

Peter, et al,

Here are my results with only a few minutes of playing:

These values are for a single ended version.

From -57 to -20dB, only one pass resistor is used, and the impedence ranges from 45126 to 55000

How does this table look:

const struct tab table[] = {
{0 , 254}, // Volume Setting 0 = -57.067880 dB imp 45126.315789
{0 , 239}, // Volume Setting 1 = -56.548678 dB imp 45134.108181
{0 , 216}, // Volume Setting 2 = -55.685212 dB imp 45148.148148
{0 , 195}, // Volume Setting 3 = -54.816724 dB imp 45163.755459
{0 , 177}, // Volume Setting 4 = -53.972449 dB imp 45180.505415
{0 , 160}, // Volume Setting 5 = -53.083531 dB imp 45200.000000
{0 , 145}, // Volume Setting 6 = -52.247199 dB imp 45220.264317
{0 , 131}, // Volume Setting 7 = -51.378108 dB imp 45243.506494
{0 , 119}, // Volume Setting 8 = -50.490519 dB imp 45269.784173
{0 , 107}, // Volume Setting 9 = -49.631719 dB imp 45297.914598
{0 , 97}, // Volume Setting 10 = -48.774011 dB imp 45328.947368
{0 , 88}, // Volume Setting 11 = -47.906528 dB imp 45363.636364
{0 , 80}, // Volume Setting 12 = -47.082169 dB imp 45400.000000
{0 , 72}, // Volume Setting 13 = -46.171288 dB imp 45444.444444
{0 , 65}, // Volume Setting 14 = -45.324634 dB imp 45490.196078
{0 , 59}, // Volume Setting 15 = -44.511354 dB imp 45538.599641
{0 , 54}, // Volume Setting 16 = -43.579539 dB imp 45600.000000
{0 , 48}, // Volume Setting 17 = -42.670778 dB imp 45666.666667
{0 , 45}, // Volume Setting 18 = -42.014302 dB imp 45719.424460
{0 , 40}, // Volume Setting 19 = -41.099917 dB imp 45800.000000
{0 , 37}, // Volume Setting 20 = -40.307195 dB imp 45877.192982
{0 , 32}, // Volume Setting 21 = -39.180828 dB imp 46000.000000
{0 , 30}, // Volume Setting 22 = -38.433730 dB imp 46090.909091
{0 , 28}, // Volume Setting 23 = -37.786034 dB imp 46176.470588
{0 , 24}, // Volume Setting 24 = -36.713811 dB imp 46333.333333
{0 , 22}, // Volume Setting 25 = -35.706597 dB imp 46500.000000
{0 , 19}, // Volume Setting 26 = -34.901496 dB imp 46648.351648
{0 , 18}, // Volume Setting 27 = -34.320067 dB imp 46764.705882
{0 , 16}, // Volume Setting 28 = -33.255157 dB imp 47000.000000
{0 , 15}, // Volume Setting 29 = -32.485642 dB imp 47189.781022
{0 , 14}, // Volume Setting 30 = -31.709215 dB imp 47400.000000
{0 , 11}, // Volume Setting 31 = -30.396560 dB imp 47803.738318
{0 , 12}, // Volume Setting 32 = -30.237667 dB imp 47857.142857
{0 , 9}, // Volume Setting 33 = -28.659386 dB imp 48448.275862
{0 , 8}, // Volume Setting 34 = -27.421357 dB imp 49000.000000
{0 , 7}, // Volume Setting 35 = -25.845121 dB imp 49838.709677
{0 , 6}, // Volume Setting 36 = -24.082400 dB imp 51000.000000
{0 , 5}, // Volume Setting 37 = -22.670778 dB imp 52142.857143
{0 , 3}, // Volume Setting 38 = -20.506117 dB imp 54375.000000
{0 , 4}, // Volume Setting 39 = -20.000000 dB imp 55000.000000
{1 , 5}, // Volume Setting 40 = -15.620739 dB imp 25142.857143
{1 , 3}, // Volume Setting 41 = -13.696907 dB imp 27375.000000
{1 , 4}, // Volume Setting 42 = -13.255157 dB imp 28000.000000
{1 , 2}, // Volume Setting 43 = -10.629578 dB imp 33000.000000
{2 , 2}, // Volume Setting 44 = -9.085167 dB imp 28846.153846
{1 , 1}, // Volume Setting 45 = -7.747797 dB imp 43000.000000
{2 , 1}, // Volume Setting 46 = -6.476144 dB imp 38846.153846
};

resistors were:

R_BYPASS =45000.0;
R2_BYPASS =30000.0;
R3_BYPASS =20000.0;
// not used ROPTION =100000.0;
R0 =25000.0;
R1 =15000.0;
R2 = 10000.0;
R3 =4000.0;
R4 =2000.0;
R5 =1000.0;
R6 =500.0;
R7 =250.0;
}

 

[harvardian]

Peter, et al,

Oops some mistake in the other version:

These values are for a single ended version.

impedence ranges from 26K. to 51K

How does this table look:

{0 , 224}, // Volume Setting 0 = -60.008682 dB imp 50050.000000
{0 , 210}, // Volume Setting 1 = -59.142564 dB imp 50055.248619
{0 , 192}, // Volume Setting 2 = -58.426792 dB imp 50060.000000
{0 , 180}, // Volume Setting 3 = -57.435349 dB imp 50067.264574
{0 , 163}, // Volume Setting 4 = -56.588220 dB imp 50074.165637
{1 , 202}, // Volume Setting 5 = -55.712458 dB imp 35352.032705
{1 , 191}, // Volume Setting 6 = -54.785861 dB imp 35358.564478
{0 , 96}, // Volume Setting 7 = -53.996755 dB imp 50100.000000
{0 , 95}, // Volume Setting 8 = -52.937872 dB imp 50112.994350
{1 , 118}, // Volume Setting 9 = -52.289259 dB imp 35380.077532
{1 , 105}, // Volume Setting 10 = -51.442392 dB imp 35388.904377
{0 , 65}, // Volume Setting 11 = -50.548301 dB imp 50148.883375
{1 , 91}, // Volume Setting 12 = -49.722773 dB imp 35409.724583
{0 , 63}, // Volume Setting 13 = -48.844368 dB imp 50181.268882
{0 , 55}, // Volume Setting 14 = -48.022264 dB imp 50199.335548
{0 , 48}, // Volume Setting 15 = -47.396681 dB imp 50214.285714
{0 , 45}, // Volume Setting 16 = -46.242136 dB imp 50244.897959
{1 , 58}, // Volume Setting 17 = -45.431366 dB imp 35483.991065
{1 , 50}, // Volume Setting 18 = -44.569819 dB imp 35503.907857
{1 , 47}, // Volume Setting 19 = -43.443126 dB imp 35533.161472
{1 , 42}, // Volume Setting 20 = -42.911605 dB imp 35548.354935
{1 , 36}, // Volume Setting 21 = -41.987112 dB imp 35577.136515
{0 , 31}, // Volume Setting 22 = -40.841004 dB imp 50458.015267
{0 , 28}, // Volume Setting 23 = -40.228589 dB imp 50491.803279
{0 , 24}, // Volume Setting 24 = -39.338471 dB imp 50545.454545
{0 , 23}, // Volume Setting 25 = -38.605393 dB imp 50594.059406
{1 , 30}, // Volume Setting 26 = -37.649821 dB imp 35762.867647
{1 , 26}, // Volume Setting 27 = -36.806551 dB imp 35811.359026
{1 , 24}, // Volume Setting 28 = -36.352085 dB imp 35839.572193
{1 , 21}, // Volume Setting 29 = -35.099551 dB imp 35925.696594
{1 , 18}, // Volume Setting 30 = -34.251013 dB imp 35991.792066
{1 , 16}, // Volume Setting 31 = -33.635463 dB imp 36044.117647
{0 , 15}, // Volume Setting 32 = -32.769785 dB imp 51176.470588
{0 , 13}, // Volume Setting 33 = -31.709215 dB imp 51333.333333
{0 , 12}, // Volume Setting 34 = -31.126050 dB imp 51428.571429
{0 , 10}, // Volume Setting 35 = -29.827234 dB imp 51666.666667
{0 , 9}, // Volume Setting 36 = -29.096897 dB imp 51818.181818
{0 , 8}, // Volume Setting 37 = -28.299467 dB imp 52000.000000
{1 , 11}, // Volume Setting 38 = -27.582910 dB imp 36832.579186
{1 , 10}, // Volume Setting 39 = -26.917849 dB imp 36960.784314
{1 , 8}, // Volume Setting 40 = -25.412207 dB imp 37294.117647
{0 , 7}, // Volume Setting 41 = -25.343435 dB imp 52857.142857
{0 , 6}, // Volume Setting 42 = -24.082400 dB imp 53333.333333
{0 , 5}, // Volume Setting 43 = -22.606675 dB imp 54000.000000
{1 , 7}, // Volume Setting 44 = -22.511539 dB imp 38151.260504
{1 , 6}, // Volume Setting 45 = -21.280346 dB imp 38627.450980
{0 , 4}, // Volume Setting 46 = -20.827854 dB imp 55000.000000
{1 , 5}, // Volume Setting 47 = -19.845351 dB imp 39294.117647
{1 , 4}, // Volume Setting 48 = -18.125433 dB imp 40294.117647
{1 , 3}, // Volume Setting 51 = -15.978697 dB imp 41960.784314
{1 , 2}, // Volume Setting 55 = -13.120836 dB imp 45294.117647
{2 , 3}, // Volume Setting 56 = -11.624197 dB imp 25416.666667
{2 , 3}, // Volume Setting 57 = -11.624197 dB imp 25416.666667
{2 , 2}, // Volume Setting 59 = -9.172757 dB imp 28750.000000
{3 , 2}, // Volume Setting 61 = -8.371400 dB imp 26216.216216
{2 , 1} // Volume Setting 63 = -5.744834 dB imp 38750.000000
resistors were:


R_BYPASS =50000.0; // 45000
R2_BYPASS =120000.0;
R3_BYPASS =30000.0;
ROPTION =100000.0;
R0 =20000.0;
R1 =10000.0;
R2 =5000.0;
R3 =2000.0;
R4 =750.0;
R5 =300.0;
R6 =150.0;
R7 =100.0;
}

 

[Cobra2]

Re: Assembly Question :

Hi!
Have read the *******' manual, but all is not clear to me yet.
And some small errors.
In the IS1 manual, "chap."10: X3 is not the 5V terminal...

I want the HT-Bypass function, but does it need to be mounted at all on the 5-8 input extension board?

And if I understood correct, the X3 carries audio, and connects 1:1 ?
"chap."20 mentiones this, but says: PARALELL, not in series....

Where dos the APOX mute?
From IS1 board or volume board?

Arne K

 

[harvardian]

Re: Re: Assembly Question :

Hi!
Have read the *******' manual, but all is not clear to me yet.
And some small errors.
In the IS1 manual, "chap."10: X3 is not the 5V terminal...

X4 is the +5V connection.

I want the HT-Bypass function, but does it need to be mounted at all on the 5-8 input extension board?

- That is correct. You can eliminate K9, K10, and K11, R1, R2 on the 5-8 input extension boards

And if I understood correct, the X3 carries audio, and connects 1:1 ?
"chap."20 mentiones this, but says: PARALELL, not in series....

X3 should be a 1:1 connection between the two boards on one channel.
Basically think of the input boards as a 8:1 switch. Only one
of the eight will be connected to the output.

Where dos the APOX mute?
From IS1 board or volume board?

The APOX-1 board has a muting relay.

Arne K

Hi Arne my answers are inserted.

Dale

IS1 schematic

IS1 PDF


APOX-1 schematic

APOX-`1

 

[dipchip]

DipChip Electronics is now Apox Audio!

Hello all,

Dale and I have decided to change company names, and split our web site into two sites. One web site for the audio controls,
and one web site for the industrial control boards we make.

We are currently in the middle of trying to change web sites.
and company names. All audio boards will now be sold under the name "Apox Audio" and all information will be at www.apoxaudio.com

However, our internet service provider hasn't finished switching the domains yet. (it usually takes 2 to 3 days)

so in the mean time, www.dipchipelec.com/apox.htm
will still work.

And in about 3 days, use the www.apoxaudio.com

Dale and I have also started working on the low-cost volume/inputs select version,
so stay tuned!

Thanks,
Craig Beiferman

 

[Antonio]

Display Problem

Dale, Graig,
Yesterday I have received the display, I have connected it to the main board but I still have the same problem. On the new display it is possible to see the same characters that it was possible to see on the old one. At this point I do really think that the display is not the problem, and the previous one I think is OK. The new display was connected without soldering so it is possible to use like new, and it will be send back to you.
I think that the bug is in the PIC.
What you Think?
Best regards,

Antonio Ruggiero

 

[jewilson]

Performance

Peter and Grataku,

Can you tell us what you think about the audio performance of the APOX attenuators boards.

Thanks

 

[Peter Daniel]

I still didn't listen to it. As it is mostly suitble for output placement (as it's now) I have to build a preamp first. But it looks like performance should be fine.

 

[jewilson]

That great, what are you doing for a preamp this time.

 

[Peter Daniel]

I will finally try Aleph P1.7 and XBOSOZ. I'will be comparing them to this (which indeed is a parts farm, as they say about Madrigal designs). I bought that ML 38 board.

 

[jewilson]

Looks Cool

Your right about being a parts farm. But I betit's going to sound quite nice. Let me know how it compairs to your XBOSOZ.

So did you ever look up Component Rearch for those Teflon caps.

Regards

 

[Peter Daniel]

I downloaded the specs, but didn't have a chance to order the caps yet. Since XOno got such praise in latest Recommended Componenets, I'll build one too.