It finally arrived! Philips 1964 Australian made 9V micmixr

Bluesgeetar · February 03, 2004, 09:56:08 PM

Well for those of you that remember back in NOvember, I won an ebay auction for an old Philips made in Australia 5 tranny based, 5 channel mic mixer. It is powered by a 9V battery. It has 4 OC71 on 4 channels and a OC44 on the master out channel. I had no clue Philips made stuff in Australia! Anyways Munky volunteered to post the schematic that came with unit. The problem is that now that I have got it, I see the schematic has seen better days. So I will also need to post pics of the circuit so you guys that are interested can figure it out. Or does anyone wanna take the pics and redraw the schem and then post it. This is a piece of musical history here. Never seen one of these and I do alot of scrounging. So who wants to post the pics and the schem? Or take the pics and the schem and redraw it to were it is legible? Munky you wanna do all that? I'm pleased as pie on my end! I'm just trying to help you guys. I see there have been some recent posts about Mixers and design. This should be very helpful.

saros141 · February 03, 2004, 10:48:51 PM

Cool! I remember that... have you fired it up yet? How does it sound?

Bluesgeetar · February 03, 2004, 11:13:55 PM

Hey the link to the pic on ebay and the auction are still there!

Take a look guys!
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2202606496&category=132

Nope hadn't fired it up yet. Just got it out the box. Then had to eat dinner! It came at around 5:00PM Don't think I can fire it up soon. It has some strange mic connections in the back. I'll head to he surplus store to find out what I need to get it hooked up. A piece of musical history! Cool. This sits next to my old Supro stereo splitter/treble bass splitter thingamajiger as the new rare wierd thing I have found. Can't wait to hear it's boost quality's. So the signal will hit two famous trannies! First into the OC71 then out the master channel where the OC44 sits! I'm stoked!

fernmeister · February 04, 2004, 06:33:06 AM

Quote from: BluesgeetarI had no clue Philips made stuff in Australia!

radios, amps, tvs all sorts of stuff. australia had quite a serious electronics industry back in the 60s and 70s...

Paul Perry (Frostwave) · February 04, 2004, 06:37:50 AM

Quote from: fernmeisteraustralia had quite a serious electronics industry back in the 60s and 70s...

heh, so did USA!

Marcos - Munky · February 04, 2004, 07:30:23 AM

I can try to redraw the schematic, but post the pics in the forum, if I can't get to redraw the schematic, somebody can redraw it.

Jim Jones · February 04, 2004, 08:46:02 AM

That thing rocks!

You could probably make a few tweaks and turn it into a four channel treble booster!

Jim

Peter Snowberg · February 04, 2004, 08:50:20 AM

Quote from: Jim JonesThat thing rocks!

You could probably make a few tweaks and turn it into a four channel treble booster!

Jim

That is an awesome looking unit!

You could also chain the stages and make a germanium overdrive.

Take care,
-Peter

Bluesgeetar · February 04, 2004, 09:18:32 AM

Ok I have calmed down a little now from my excitement of G.A.S.. I have taken a much closer look at the schematic and it will be a simple redraw. I only see one problem area. First the four channels are exactly the same. SO even though some of the channels on the schem are messed up to the point where you can't see the values some of the other channels diagrams are in perfect shape. So just need to draw four channels and copy the same values for all four. The only problem area is one cap value that is attached to the leg of the the OC44. The value has worn away but the cap symbol made though. So I'll need to pop off the board and get a look at that value. So It won't need those pics to help like I thought. Just a nice redraw. I'll post detailed pics if you guys want but it is straight forward.
The one thing that confuses me is that maybe it was ahead of my time but the 9V battery seemed to be a big sucker. I don't think it was a standard 9V. Much bigger indent left in the foam and a huge bracket to hold in a much larger than standard 9V.
I'll scan the schem today and send it to Munky with my notes.

Paul Perry (Frostwave) · February 04, 2004, 10:51:44 PM

Quote from: BluesgeetarOkThe one thing that confuses me is that maybe it was ahead of my time but the 9V battery seemed to be a big sucker. I don't think it was a standard 9V. Much bigger indent left in the foam and a huge bracket to hold in a much larger than standard 9V.
.

Back in the Good Old Days we had 9v transistor radios the size of two bricks, with a battery the size of half a brick..

I suppose there are battery collector sites out there...!

Bluesgeetar · February 05, 2004, 08:31:03 AM

Well I successfully sent Jim Jones the Schem. I also sent it to aron. I tried to send it to Munky but hotmail keeps kicking it back. I think there is a limit to how much you can send and receive on hotmail unless you sign up for the $20 deluxe hotmail account. I don't know if Aron got his. The file is on PDF as this is the only way I know how to do it. The detail seems to be pretty good, I'm proud of my scanner! It is almost 500K file.

Marcos - Munky · February 05, 2004, 09:31:36 AM

The problem in Hotmail is that we have a short space for e-mails (1,5mb or 2mb). My inbox was almost full, but now I cleaned it.

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It finally arrived! Philips 1964 Australian made 9V micmixr