Audio Patchbay relay board

[PRR]

> best way to purchase an Analog Devices Eval board?

On http://www.analog.com/en/prod/0%2C2877%2CAD8113%2C00.html

click "Price, Packaging, and Availability":
http://www.analog.com/en/prod/0%2C2877%2CAD8113%2C00.html#price

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You send them an email via a webform. "Registration is required": I'm registered (for samples) and there is no downside except the Analog Newsletter, which is occasionally useful and always more interesting than my Viiagra and Mortgage spam. And you can probably get off the newsletter, but I'm cool with it so I never tried.

 

[radiance]

[quote author="Svart"]

In fact those are 5$ a piece at digikey..

:green:[/quote]

The above ebay offer went for $53.40 . That's $0.0445 a piece :shock:

 

[chrissugar]

I mostly use Omron ans Matsushita relays.
I know the NAIS are considered very good for audio. They are used in the Audio Precision audio analysers, and that is a good indicator about how good they are.

chrissugar

 

[sodderboy]

[quote author="Svart"]Old timers!

I doubt very seriously that the ssm parts could be picked out of an A/B with relays.
:green:[/quote]

I will consider myself old when I run out of these 1N23A's!

I like the idea of a side by side comparison. So much fun, so little time

 

[justanalogue]

Seen boards stuffed with 132 2x DPDT NAIS relays on them for $10
http://www.apexelectronic.com/relay_board.htm

Could be a start...

Willem

 

[JohnRoberts]

I realize this is an old thread.

That board may be something pulled out of service from a bed of nails factory test system. For $10 I'd be suspect of future reliability.

I have mixed feelings about utility of relay controlled patch bay due to number of switch points needed to cover all bases.

To answer one concern, electronic switches can be made as clean as a single inverting opamp, while some still question how clean that is.

I designed a midi controlled patch bay/insert device years ago and the modest goal of patching 4 external EFX units into 8 inserts was busy enough. increasing the scope would increase the switch points required dramatically.

One subtle benefit of the solid state switching is pre/de emphasis can be used to de-click the switches so they can be used on the fly in connection with automation (better sounding than real switches).

This all seems moot with such tricks probably better pulled off in digital domain.

YMMV

JR

 

[justanalogue]

Dear John,

guess you got a point about the relay boards.

I am looking for a MIDI based switcher to switch the EQ switch inside the channels of my console from post insert to pre insert when I am tracking.
That's why I need relays.
Console is a PM 3K and I am using the inserts as tape send and returns.
Found a software based remote for the Alesis HD24, it uses MIDI and would like to control the switch EQ settings by linking it to the tracks I am arming.
Do you have schematics or directions to achieve this?

Thanks in advance!

Best regards,

Willem.

 

[JohnRoberts]

If you're just trying to automate switch capability already available in the 3K drop relays in place of switches. If you're trying to add capability not already designed in you may have issues with exposing internal circuit nodes to the outside world without adequate buffering, ground referencing, etc. Not necessarily a trivial task.

JR

 

[Freq Band]

There is the out-of-production Yamaha PLS1, midi programmable line selector.

http://www2.yamaha.co.jp/manual/pdf/pa/english/others/PLS1E.pdf

On another note, I found a bunch of these 5v relays (mercury, SPDT) which, as you can see in the pic, have sheilded contacts. I have not tested them for NR, side-by-side with other relays.

=FB=

 

[Igor]

Ahemmm...just my $0.25....
Purepath control room module???

http://www.groupdiy.com/index.php?topic=18346

allready done and tested...
new layout done for xlr connectors...