A1200 Replica PCB Progress - Page 4

Chucky · 14 July 2018, 09:23

well scans of PCBs is now not needed.. as I am doing final tests of my cadfile..
so far I ave tested all points from videooutputarea, lisa, gayle, alice, videodac and surroundings. halp of topside left to check and test. so in a week everything should be done. THEN time to rip off stuff and do changes. (actually now most the videoarea changing to another way of getting composite and/or svideo. RF will be no more

Chucky · 17 July 2018, 11:11

All pads have now been verified. (ok there is a SLIGHT risc something is missed) now it is time to verify the componentlist. putting out values of all USED components on the board like I did on the 3660. (SMALL text. I know

) this is hopefully done today..

then I will rip up parts of the video circuit and replace it with a more modern one. (no more RF!)

but Audio. should I use a 3.5mm and maybe try to get a Svideo slot in one of the RCA slots (not checked if it will phyically fit yet) or have 2 RCAs as it is?

Marlon_ · 17 July 2018, 11:19

Personally I'd want the RCA's

ajk · 17 July 2018, 11:24

Could 3.5mm audio and s-video both fit to the space left by the RF modulator, or did you have other plans for that cutout? I haven't looked at the dimensions of the case in detail.

Marlon_ · 17 July 2018, 11:26

Quote:

Originally Posted by ajk

Could 3.5mm audio and s-video both fit to the space left by the RF modulator, or did you have other plans for that cutout? I haven't looked at the dimensions of the case in detail.

vGA port I believe

Chucky · 17 July 2018, 12:31

I have planned a VGA port there (15KHz) but MAYBE a Svideo / RCA combination (you only have one!) would be possible where the composite is

Marlon_ · 17 July 2018, 12:38

Quote:

Originally Posted by Chucky

Svideo / RCA combination (you only have one!)

So, you mean forced mono in one RCA jack? That's a no go for me for music purposes, and I believe others would agree.

Chucky · 17 July 2018, 12:48

nonono where the composite is. a RCA for Composite or Svideo for Svideo. and for audio let the RCA be as it is

Marlon_ · 17 July 2018, 12:49

Quote:

Originally Posted by Chucky

nonono where the composite is. a RCA for Composite or Svideo for Svideo. and for autiop let the RCA be as it is

Ah, thanks for clarification. That's totally fine with me. ^^

Chucky · 17 July 2018, 12:50

I WILL however put an optional jumper for "always mono" as it is how I want it..

Marlon_ · 17 July 2018, 13:21

Quote:

Originally Posted by Chucky

I WILL however put an optional jumper for "always mono" as it is how I want it..

It's nice having the option at least.

Chucky · 17 July 2018, 13:36

Not doing music and the hard separation kills me when using my headphones..

ajk · 17 July 2018, 14:08

Now that you mention it, how about a possibility to install an audio mixer with a pot for an adjustable level of separation?

Wouldn't take much space on the board and it could be left unpopulated for original functionality.

Chucky · 17 July 2018, 14:22

been thinking of it.. have to see..
I want to do a run quite soon to know is this is working. so maybe in coming revision

Marlon_ · 17 July 2018, 14:24

Quote:

Originally Posted by Chucky

been thinking of it.. have to see..
I want to do a run quite soon to know is this is working. so maybe in coming revision

Daedalus · 17 July 2018, 14:59

What about a combined footprint that lets you install the 2x RCAs *or* a 3.5mm jack at the same position?

katarakt · 17 July 2018, 17:53

The more output formats, the better. If you can fit Svideo on one RCA (i think this should fit) and a 3.5 stereo out audio and on the other side vga and composite, or whatever, the better it is. Go for it

...great work Chucky

Chucky · 17 July 2018, 18:45

teaser how I think I will order the boards. in process of finalizing the 1:1 1d.4 file..

talybont · 17 July 2018, 19:03

Looking good Chucky! If you're going to start doing changes to accommodate VGA/S-Video etc, why not remove the RGB port? Can't the VGA port include RGB signals?

Marlon_ · 17 July 2018, 19:04

Quote:

Originally Posted by talybont

Looking good Chucky! If you're going to start doing changes to accommodate VGA/S-Video etc, why not remove the RGB port? Can't the VGA port include RGB signals?

Compatibility

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14 July 2018, 09:23	#61
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	well scans of PCBs is now not needed.. as I am doing final tests of my cadfile.. so far I ave tested all points from videooutputarea, lisa, gayle, alice, videodac and surroundings. halp of topside left to check and test. so in a week everything should be done. THEN time to rip off stuff and do changes. (actually now most the videoarea changing to another way of getting composite and/or svideo. RF will be no more

17 July 2018, 11:11	#62
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	All pads have now been verified. (ok there is a SLIGHT risc something is missed) now it is time to verify the componentlist. putting out values of all USED components on the board like I did on the 3660. (SMALL text. I know ) this is hopefully done today.. then I will rip up parts of the video circuit and replace it with a more modern one. (no more RF!) but Audio. should I use a 3.5mm and maybe try to get a Svideo slot in one of the RCA slots (not checked if it will phyically fit yet) or have 2 RCAs as it is?

17 July 2018, 11:19	#63
Marlon_ AmigaDev.com Join Date: Mar 2016 Location: Stockholm, Sweden Age: 35 Posts: 625	Personally I'd want the RCA's

17 July 2018, 11:24	#64
ajk Registered User Join Date: May 2010 Location: Helsinki, Finland Posts: 1,341	Could 3.5mm audio and s-video both fit to the space left by the RF modulator, or did you have other plans for that cutout? I haven't looked at the dimensions of the case in detail.

17 July 2018, 12:31	#66
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	I have planned a VGA port there (15KHz) but MAYBE a Svideo / RCA combination (you only have one!) would be possible where the composite is

17 July 2018, 12:48	#68
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	nonono where the composite is. a RCA for Composite or Svideo for Svideo. and for audio let the RCA be as it is

17 July 2018, 12:50	#70
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	I WILL however put an optional jumper for "always mono" as it is how I want it..

17 July 2018, 13:36	#72
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Not doing music and the hard separation kills me when using my headphones..

17 July 2018, 14:08	#73
ajk Registered User Join Date: May 2010 Location: Helsinki, Finland Posts: 1,341	Now that you mention it, how about a possibility to install an audio mixer with a pot for an adjustable level of separation? Wouldn't take much space on the board and it could be left unpopulated for original functionality.

17 July 2018, 14:22	#74
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	been thinking of it.. have to see.. I want to do a run quite soon to know is this is working. so maybe in coming revision

17 July 2018, 14:59	#76
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,334	What about a combined footprint that lets you install the 2x RCAs or a 3.5mm jack at the same position?

17 July 2018, 17:53	#77
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	The more output formats, the better. If you can fit Svideo on one RCA (i think this should fit) and a 3.5 stereo out audio and on the other side vga and composite, or whatever, the better it is. Go for it ...great work Chucky

17 July 2018, 18:45	#78
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	teaser how I think I will order the boards. in process of finalizing the 1:1 1d.4 file..

17 July 2018, 19:03	#79
talybont Registered User Join Date: Oct 2016 Location: Norway Posts: 170	Looking good Chucky! If you're going to start doing changes to accommodate VGA/S-Video etc, why not remove the RGB port? Can't the VGA port include RGB signals?

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