Alembic Guitars Club

Alembic products => Alembic Basses & Guitars => Topic started by: funkyjazzjunky on October 10, 2008, 07:59:32 AM

Title: Two compartments
Post by: funkyjazzjunky on October 10, 2008, 07:59:32 AM

What is in the 2nd compartment on the back of some Alembics?  It appears too large to be a battery compartment.

Title: Two compartments
Post by: juggernaught on October 10, 2008, 08:05:45 AM

the battery compartment for LEDs (4 9v) or for the bridge block on series instruments

Title: Two compartments
Post by: funkyjazzjunky on October 10, 2008, 01:58:42 PM

4 9v?  I do not get it.  I though LED's consumed very little energy?  Is there an separate Battery for the op-amp?

Title: Two compartments
Post by: juggernaught on October 10, 2008, 02:06:02 PM

More voltage does not equal more energy.

Title: Two compartments
Post by: keith_h on October 11, 2008, 06:13:36 AM

When a bass has LED's there is a set of batteries for the LED's and a separate battery for the preamp.
 
Keith

Title: Two compartments
Post by: dfung60 on October 14, 2008, 11:51:30 PM

Are you asking about Series basses?  They are quite different than the other Alembics.  
 
The normal compartment has a lot of pots and connectors.  A Series I would have 4 pots, but there are also Q-switches, the 5-pin stereo output jack, and a very complicated 1/4 jack.  
 
On the other side of the body, there's a the preamp and EQ boards.  There's a tunnel between the compartments with a lot of wiring.  
 
There's also a third, smaller plate in the center block that holds a pair of 9V batteries that power the electronics when you're not using the 5-pin external power.  Sometimes it's round, sometimes it's square.
 
There was a period where Series bodies were quite thick, so the electronics were all on one side.  
 
And, as you probably already knew, the Series basses are semi-hollow contstruction - the neck/center block runs the entire length of the instrument and the top and back are 1/4 thick, but they bandsaw most of the center core out.  This is only really visible when the plates are off.
 
David Fung

Title: Two compartments
Post by: rogueman on October 22, 2008, 12:49:48 PM

My Rogue has three compartments. One for the electronics, one 9v compartment and one for the four 9V batteries for the LEDS. I don't know if they are in series or parallel. Will work for batteries!