Conn Pipe connection

[Guest]

I was just given a Conn 580 with 255 Leslies and the 145 and 146 set of pipes. It belonged to an old lady who passed away and her daughter was disposing of the house and I happened to be working on it and sheasked me if I knew how to play. I told her I played the piano so she said take it. Well to make a long story short it was in very nice condition so I took it home and cleaned all the contacts etc. Everything seems to work (I do play the piano but know nothing about organs) I have the big interconnecting cable for the Leslies but am not sure how to connect the pipes can anyone clue me in to this? I probably won't keep the instrument because I don't have time to learn another one but I would like hear it for a while.

[John Kinkennon]

Re: Conn Pipe connection

Does the organ have a small black Pipe Connector box mounted under the keyboards? If so, look for a pair of terminals on the box where the "pipes" connect. The two sets connect in parallel across the two terminals.

[Guest]

Re: Conn Pipe connection

There is a small black box about 1inx4inx6in mounted on the underneath of the manual at the right hand side. It has a three position switch on it and terminals on the rear. It looks like thereare 6 terminal positions and on set already has speaker wire connected to it. there is a speaker wire exiting the rear at the same place the power plug and the Leslie connector exits. I probably should pull the rear off and trace it down.

[John Kinkennon]

Re: Conn Pipe connection



Hopefully you will find that the speaker wire connected to the black box is routed through the cabinet and out the back. I wouldn't assume anything without pulling the back off and taking a look. The three position switch was to let you hear the organ's internal speaker, the external pipe speakers, or both. There may be a level control on the box that controls the volume of the internal speaker. I'm looking at a poor copy of a photo that seems to show a six position terminal strip. I'd guess you'll find only two are used. Otherwise you'll need to pull the box and see whats actually connected.

[Guest]

Re: Conn Pipe connection

If I operate the switch there is a position where I hear nothing and two positions where I hear the internal speaker so I would assume thats the switch for the pipes. there is a level control on it also. So what I need to determine is where that speaker wire that is connected to it goes. I have the original manual and a couple of other manuals but nothing concerning the Leslies or the pipe speakers. The Leslies are as large as my Altec floor speakers for my Stereo.

[Guest]

Re: Conn Pipe connection

One other thing, on the rear of the 255 leslie amp section is a slide switch between the organ hook up and the other speaker hook up. The paper on it indicating its use is gone. Does anyone know its use?

[jimmywilliams]

Re: Conn Pipe connection



What is the number stamped onyour Conn Pipe connector box? Is it 717770-3 or 717770-4? Also, is your "Leslie" actually a Conn 255 amp/speaker cabinet? If so it would lie horizontal and be divided into two "sections" - one side has a 15" speaker, the 4-channel amplifier, and hookup receptacle/relays; the other side has a self-contained 2-speed leslie-typoe rotating unit/speaker. Please advise. I have a lot of documentation about the old Conn apps/cabs/pipes/hookups and would be glad to help if I can. Also, how many of each unit do you have?

-jim

[jimmywilliams]

Re: Conn Pipe connection



[quote user="quindecima"]One other thing, on the rear of the 255 leslie amp section is a slide switch between the organ hook up and the other speaker hook up. The paper on it indicating its use is gone. Does anyone know its use?[/quote]

Is this switch only 2-positions (up and down?). If so, ... if this is the switch I THINK it is, it will be set differently if the organ is4-channel or not. Your Conn 580 organ is a 2-channel organ so the switch should be in the LOWER position to activate the crossover circuit correctly. Does this sound right -was the switch in the lower position when you recieved the unit? Make sure you don;t change anything from how it was originally given to you; you know the organ/cabs DID work correctly the original way.

If you have a set of 145 and 146 pipes they should sit on top of the Conn 255 amp/speaker unit and connect to the terminal strip in that cabinet located - from the back of the unit, in the upper right hand corner of the amp "section" of the cabinet.(Edit - PREVIOUS WRONG INFO REMOVED from message - see next post for correction!!)

-jim

[jimmywilliams]

Re: Conn Pipe connection



My previous post was wrong - was reading wrong schematic (it's getting late).

Do you have a double-lead wire coming from your pipe set (I assume the 2 sets of pipes - 145 and 146 - are already connected together somehow)? If so, connect one wire to terminal three and the other to terminal four (numbered right to left) on the terminal strip located in the upper right of the amplifier "section" of the Conn 255 speaker. Terminal 4 is "hot"; terminal 3 is ground. If you don't know which of the 2 leads is hot or ground, you may have to experiment to make sure the pipe speakers are not wired out of phase. If it sounds good it is probably OK. Let us know how it works.

Hope this helps,

jim

[Guest]

Re: Conn Pipe connection

The number stamped on the black box is 71770-4 and the Leslie is actually a Conn 255 I should have said that initially. I have both sides of the 255 speaker assembly. I could use any help and copies of documentation if possible.

[Guest]

Re: Conn Pipe connection

The pipe sets have two terminals on the rear of each of them and are not connected together. I went out and looked at the amp section and found the terminal you are speaking of. the original paper indicator is still attached.. I think I'm on the right track

[Guest]

Re: Conn Pipe connection

Yes, the switch is a two position (I did not move it) and is in the lower position.

[Guest]

Re: Conn Pipe connection

Actually Jim, the amp and Leslie are all in the same box the other box is speakers only with a 4 prong female connector to the amp section.

[Guest]

Re: Conn Pipe connection

So now that I have gone thru all that what is the speaker wire for that is connected to the black box? It is grey the same as the other wireing and looks like it has been taped together from day one.

[jimmywilliams]

Re: Conn Pipe connection



[quote user="quindecima"]Actually Jim, the amp and Leslie are all in the same box the other box is speakers only with a 4 prong female connector to the amp section.[/quote]

How many cabinets do you have? What you are describing sounds to me like a 255 cabinet AND a 256 cabinet. The 255 has two"halves" in the same box: one side is the amp/connector/15" apeaker; the other side is the Leslie.A 256 cabinet has only speakers - a 12" , 10", and 6x9" and connects to the 255 amp/cabinet via a 4-pin connector. Is this what you have?

-jim