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 Forum index » DIY Hardware and Software » PAIA Equipment
Old PAIA 47xx modules, new project
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Cfish



Joined: Feb 24, 2016
Posts: 451
Location: Indiana

PostPosted: Thu Nov 10, 2016 6:21 pm    Post subject: Old PAIA 47xx modules, new project Reply with quote  Mark this post and the followings unread

Had these PAIA 4700 series modules for a while. Finally decided to do something with them.

It's starting to come together.


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Cfish



Joined: Feb 24, 2016
Posts: 451
Location: Indiana

PostPosted: Sat Nov 12, 2016 5:01 am    Post subject: Reply with quote  Mark this post and the followings unread

Anyone happen to know what size banana jacks these are?

I need to order patch cables, and got it wrong on my first try.
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RC2525



Joined: Feb 17, 2013
Posts: 5
Location: PA

PostPosted: Tue Nov 15, 2016 9:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

Nicely done!

Cfish wrote:
Anyone happen to know what size banana jacks these are?

I need to order patch cables, and got it wrong on my first try.

The patch cables that carry control voltages are known as pin tip jacks, essentially the same thing that is used by many multi-meters. Not really banana jacks, they are thinner and they don't stack. Most likely you will just find the tips (rather than a complete patch cable) and have to make your own patch cable. One user tried speaker pin plugs from RadioShack and they worked. You can order the pin tip jacks from Mouser.

Mouser part 530-105-0302-1

Alternatively, you could replace the pin tip jacks with banana jacks.
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Cfish



Joined: Feb 24, 2016
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Location: Indiana

PostPosted: Wed Nov 16, 2016 1:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks RC2525. Got some ordered.
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PHOBoS



Joined: Jan 14, 2010
Posts: 4085
Location: Moon Base
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PostPosted: Wed Nov 16, 2016 5:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

spotted it in another photo and I like it Razz
Also reminds me of my Lun-A-Key but I bet it is a big bigger.

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Cfish



Joined: Feb 24, 2016
Posts: 451
Location: Indiana

PostPosted: Wed Nov 16, 2016 6:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks PhoBos
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DES



Joined: Feb 28, 2003
Posts: 783
Location: New Jersey
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PostPosted: Sat Nov 19, 2016 1:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

That's cool! Looks like an Oz on steroids! Smile
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Cfish



Joined: Feb 24, 2016
Posts: 451
Location: Indiana

PostPosted: Sat Nov 19, 2016 1:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Dave.

Have my own version of the OZ that sits right beside it.


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Cfish



Joined: Feb 24, 2016
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PostPosted: Sat Nov 26, 2016 4:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm trying to figure out a power supply for this little system using things I already have.

I have a prebuilt +-9v regulator and and an 18 volt center tapped transformer, but it don't look like that will do.

I have a spare 30v center tapped transformer I could use and get the +-9v while making some extra heat I'm sure.

With an extra 18v regulator for the positive rail, seeing when rectified the transformer produces about 22v per rail Dc

The real question is will the 18v be to noisy?
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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Sun Nov 27, 2016 5:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Is the 18V of the center tapped transformer a measured voltage or what it is labeled at ? I think you might be able to get away with using that one.
It looks like a very small system and I don't see any leds so the power consumption is probably low. Although I can 't tell without seeing the
actual circuits or even better measuring it. But with a small load the output voltage of the tranformer might be higher and even if it is 18V I don't
think it would be a problem. I wouldn't recomend it for a modular system that will be expanded in the future but for something like this I think it is
worth a try.

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Cfish



Joined: Feb 24, 2016
Posts: 451
Location: Indiana

PostPosted: Sun Nov 27, 2016 7:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks PhoBoS

The 18v is labeled AC RMS voltage. Will se what it comes out to DC rectified later today.

the 1496 ICs in the balanced modulator VCAs are the only thing that uses the +18v and -9v rails for power.

EGs use +18 to ground and filter uses +18 to ground. But filter sounds the same using +9 to ground on my bench supply.

VCOS are +-9v rails

If the load is to high I could try running the EGs on the +9v rail to ground. That would leave the 2 1496 ICs as the only load on the +18v regulator.

Not sure how that might affect the EGs function. I have not looked at the E.G. Schematics very closely yet
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