Dubbing Buss

On 10/8/2012 7:01 PM, Mack A. Damia wrote: > > Hi, I have just dropped in to see if I can find out more about the > problem I am trying to solve. > > I am putting together a vintage stereo system: > > Pioneer SX990 amp/receiver > TEAC A-1500 Reel-to-Reel tape deck > Sony dual cassette deck > Turntable > > TEAC CD player (not too vintage - works in AUX) > > Here's the problem: > > I want to connect both the reel-to-reel tape deck and the cassette > tape deck at the same time. I have purchased a Realistic Tape Control > Center with room for three decks. > >

> > I'm not too aware of the lingo. I think I know what dubbing means > (transferring from one to another). Not certain what a buss is. > > I have accessed an instruction booklet. This is what it says (in > part): > > SWITCH FUNCTIONS (Notice front panel) > > The top road of switches determines the Input connection to the three > decks: > > - When Up, the Deck(s) is connected to the receiver/amplifier. > - In the center position, the Deck(s) is not connected (off). > - In the Down position, the Deck(s) is connected to a Dubbing Buss. > > The lower row of switches determines the Output connection of the > three decks: > > - When UP, the Deck(s) is connected to the Dubbing Buss. > - In the center position, the Deck(s0 is not connected (off). > - In the Down position, the Deck(s) is connected to the Output. > > The switch at the right has two positions and determines the signal > being passed onto the receiver/amplifier for Monitor sound. > > - In the Up position, the receiver/amplifier will monitor output from > the Dubbing Buss. > - In the Down position, the receiver/amplifier will monitor output > from Decks 1, 2 and/or 3. > > > Could somebody please explain what a dubbing buss is and also > translate these instructions so that they make sense to a neophyte? > > Thanks very much!

I don't see any replies so I give you my two cents worth. I believe the "dubbing buss" is a common point that any of the sources can be connected to. There is no amplifier or other active device to combine the signals, so it is not a great idea to connect more than one at a time.

The lower row of switches description is not entirely clear. I think they are saying the box has one output to the receiver and when the deck switch is in the lower position that deck output is connected to the box output, again this is a common point (bus) and you probably should only connect one deck at a time.

The right switch allows the output to the receiver to come from either the dubbing bus or the output bus of the three lower switches.

The rest of the instructions are mostly clear to me. The switches allow you to connect the various components in the way described. The receiver output goes to the decks according to how you set the upper switches which can also select the dubbing bus for the deck inputs. The receiver output comes from the decks according to which of the lower switches you flip down and the right hand switch sets the final selection of output to the receiver to either the output bus or the dubbing bus.

Does that make sense? If not, maybe a diagram would help, but this would be hard in ascii art...

Input Bus Lower Receiver | Upper Switches

-------->| Switches Dubbing Right Output | Bus Output Switch | | Bus |---o o-->| | | | | | o Deck 1 --o----> o | | | | | | o o---|----->| Rcvr | | | |--o Input | |----------------------------| | | | | | | | o Deck 1 --o----> o | | | | | | o o---|----->| | | | | | |----------------------------| | | | | |---o o-->| | | | | | o Deck 1 --o----> o | | | | | | o o---|----->| | | | | | |----------------------------| | | | |

Rick

Control

f09a

time.

Spot on. Nice ASCII art as well.

?-)

Not quite spot on. Reviewing it I see the deck numbers were not changed after I copied the circuit three times. I also should have distinguished connections vs. crosses better. So the above is updated.

Guess I'm a bit rusty at ASCII art.

--

Rick

Eh. OK. Still it got the concept across clearly.

?-)