Maestro - PS-1

devnulljp · Post by **devnulljp** » 12 Jun 2009, 15:15

I've seen lots of info on the Maestro - MPF-1, but never anything on the PS-1 / PS-1A / PS-1B phaser?
Anyone have a schem? Know anything about the footswitch?
It has 3 switches on top for different set speeds, and originally came with a footswitch that connected through a 6-pin Molex type connector on the back of the main unit — it’s pretty rare to find one used still with the footswitch though.
I know Ronsound builds one. I can’t imagine it’s that hard to do. Any pointers where to start?

devnulljp · Post by **devnulljp** » 27 Jun 2009, 04:20

Found a schematic
Still no info on the footswitch though...

Bernardduur · Post by **Bernardduur** » 27 Jun 2009, 12:49

The scheme is pretty simple (I have a PS laying here)

I'll check it!

devnulljp · Post by **devnulljp** » 27 Jun 2009, 15:25

Bernardduur wrote:The scheme is pretty simple (I have a PS laying here)
I'll check it!

Excellent, thanks
It's a great phaser

deluxelespaul · Post by **deluxelespaul** » 31 Jul 2009, 08:09

bump...I can guess how its wired but, would love to see a close-up pic of the guts as well. I'd like to try to duplicate the look of the switch a little better than the ronsound unit.

Bernardduur · Post by **Bernardduur** » 08 Aug 2009, 12:27

Today I'll make some pics

All three switches are SPST switches that make or break a connection. The blue switch switches the FET on and off thus turning the unit on / off. With all other switches off the unit has a 'low' speed.

When the other swicthes are turned they turn the middle / high speeds on and off. The unit ramps up which is quite nice!

The remote connections use a 6 core wire to get all connections there. The layout of the unit is:

Grey is the wire from the blue switch and need to be grounded to turn slow / unit on / off
Black is the ground
Red is the fast switch
Blue is the middle switch
Yellow is direct from a point after the diode bridge
White is the point red and blue needs to be connected to.

Yellow is for the lamps I guess. The circles in the picture are the dents of the connector so you can hook the connector only one way up.

Pictures follow!

Bernardduur · Post by **Bernardduur** » 08 Aug 2009, 20:46

deluxelespaul · Post by **deluxelespaul** » 10 Aug 2009, 14:37

Many thanks for the info. I don't suppose you have a footswitch that you could snap a pic of the internal wiring of would you?

Thanks again!

tube-exorcist · Post by **tube-exorcist** » 12 Aug 2009, 07:46

Here is a "remote panel" for you:

https://cgi.ebay.com/Vintage-Maestro-Ph ... 286.c0.m14

deluxelespaul · Post by **deluxelespaul** » 12 Aug 2009, 14:45

tube-exorcist wrote:Here is a "remote panel" for you:
https://cgi.ebay.com/Vintage-Maestro-Ph ... 286.c0.m14

Thats an interesting hack...looks like someone had it screwed into another unit of some sort. What I'd like to see is the internals/wiring of an original PSFW-2 for the PS-1/A/B

Bernardduur · Post by **Bernardduur** » 12 Aug 2009, 18:11

I guess it is just a DPDT that AND connect the 2 wires needed AND connect the lamp from V+ to ground.

tube-exorcist · Post by **tube-exorcist** » 12 Aug 2009, 18:19

Bernardduur wrote:I guess it is just a DPDT that AND connect the 2 wires needed AND connect the lamp from V+ to ground.
I guess it is just a DPDT that AND connect the 2 wires needed AND connect the lamp from V+ to ground.

I guess the switch(es) connect the (12V)-lamp(s) from AC (pin 6) to ground (pin 1).

deluxelespaul · Post by **deluxelespaul** » 12 Aug 2009, 19:56

I guess the switch(es) connect the (12V)-lamp(s) from AC (pin 6) to ground (pin 1).

Thats what i'm thinking, I'd just like to see Maestros implementation & layout of the footswitch.

analogguru · Post by **analogguru** » 18 Feb 2010, 07:16

Her is the chance for an original footswitch:

https://cgi.ebay.com/VINTAGE-MAESTRO-PS ... 2eab335e55

analogguru

Beedoola · Post by **Beedoola** » 04 Jan 2012, 07:04

Bernardduur wrote:Today I'll make some pics

All three switches are SPST switches that make or break a connection. The blue switch switches the FET on and off thus turning the unit on / off. With all other switches off the unit has a 'low' speed.

When the other swicthes are turned they turn the middle / high speeds on and off. The unit ramps up which is quite nice!

The remote connections use a 6 core wire to get all connections there. The layout of the unit is:

Grey is the wire from the blue switch and need to be grounded to turn slow / unit on / off
Black is the ground
Red is the fast switch
Blue is the middle switch
Yellow is direct from a point after the diode bridge
White is the point red and blue needs to be connected to.

Yellow is for the lamps I guess. The circles in the picture are the dents of the connector so you can hook the connector only one way up.

Pictures follow!

could you post those pictures again of the footswitch? I'm trying to repair one at the moment. Thanks!

Beedoola · Post by **Beedoola** » 07 Jan 2012, 00:11

are the similar color wires in the footswitch supposed to go to the same colors on the plug in the unit? - i.e. red to red, blue to blue.

You said:

"Grey is the wire from the blue switch and need to be grounded to turn slow / unit on / off
Blue is the middle switch"

I'm confused. So does the blue wire in the enclosure go the blue wire in the footswitch? Or does the blue wire in the footswitch go to the grey wire in the chassis?

Wires in the footswitch I have are: red, blue, white, green, black, and what I guess is grey but looks more like another black. The obvious black does the lugs on the footswitches, the Greyish is where one of the poles on all the indicators attach.

The pink lines are the Black, Green line is the Greyish wire for the lamps.

Green wire is the OFF switch, Blue - middle switch, Red- fast switch.