1/4" Jack output Hammond L100

[Runar]

Hey everybody!

This is my first thread in this forum and I'm quite a newbie.


I bought a L100 about a week ago and on tuesday I'm getting a Leslie 760.
The Leslie comes without the Combo Pre Amp II but I'm going to purchase that as well.
There is no pin-output from the organ so I've decided to put in a 1/4" jack output.

I thought this could be a good option for the line output: https://trekii.com/products/miscella.../obl-2-sl.html

Does anyone have any experience with the OBL-2-SL?
Is it easy to install?


Thanks, Runar

[enor]

Hey everybody!

This is my first thread in this forum and I'm quite a newbie.


I bought a L100 about a week ago and on tuesday I'm getting a Leslie 760.
The Leslie comes without the Combo Pre Amp II but I'm going to purchase that as well.
There is no pin-output from the organ so I've decided to put in a 1/4" jack output.

I thought this could be a good option for the line output: https://trekii.com/products/miscella.../obl-2-sl.html

Does anyone have any experience with the OBL-2-SL?
Is it easy to install?


Thanks, Runar

I wouldn't spend any money on the Combo Preamp pedal, it is a horrible little thing that only makes the organ sound worse.

Also, I wouldn't spend money on the TREK line out. It is a very nice product, but you can build the perfect interface between your L100 and your 760 yourself for 10 dollars' worth of parts (or 100 Kronor, if you're scandinavian, which your name sort of suggests).

[Runar]

I wouldn't spend any money on the Combo Preamp pedal, it is a horrible little thing that only makes the organ sound worse.

So, do you recommend the 9770-kit then? http://www.b3guys.com/9770+Leslie+Co...product_id/151

And yes I'm scandinavian! I'm from Norway :)

[enor]

So, do you recommend the 9770-kit then? http://www.b3guys.com/9770+Leslie+Co...product_id/151

And yes I'm scandinavian! I'm from Norway :)

No, all you need to hook a 760 up to an L-100 is some wire, the 9-pin jack, a speed switch, and a 10 ohm 10 watt resistor.

There is absolutely no point in using a "kit" for this.

[Runar]

No, all you need to hook a 760 up to an L-100 is some wire, the 9-pin jack, a speed switch, and a 10 ohm 10 watt resistor.

There is absolutely no point in using a "kit" for this.

I don't mean to ask alot of stupid questions but I just have to make sure. Electricity and wiring is not my strong side.. Does it matter which one of these resistors I choose?

https://www.elfadistrelec.no/no/trad...=50&simi=94.79

https://www.elfadistrelec.no/no/trad...=50&simi=92.68

https://www.elfadistrelec.no/no/trad...=50&simi=92.68

https://www.elfadistrelec.no/no/trad...=50&simi=92.67

[tpappano]

Any of those will work fine, I suggest using the least expensive. The gold colored styles are pretty, and are intended to be mounted to a metal surface for proper heat dissipation, but in this application it wouldn't make much practical difference.

[Runar]

Any of those will work fine, I suggest using the least expensive. The gold colored styles are pretty, and are intended to be mounted to a metal surface for proper heat dissipation, but in this application it wouldn't make much practical difference.

Alright! Does the resistor go on the audiosignal from the organspeaker to pin 2 in the socket?

[Runar]

So I have set up a type of a schematic..
Does it seem correct? I assume that the resistor is on the red wire to Pin 2?

I read in this thread https://organforum.com/forums/showth...lie+770+hookup that Brendon Wright recommended to use a seperate AC Power to the Leslie and not to go trough the 9-pin cable, while andyg suggested to feed the 760/770 with AC directly to Pins 8 and 9.

What are your thoughts?

And will the internal speakers sound while I play trough the Leslie? Do I need a MEE switch?


Thanks alot for your feedbacks!

[tpappano]

One of the experts here should advise on hooking up the Leslie, I've never had one 8(
From a general electronics standpoint, you just want to make sure your organ's amp is always either connected to a speaker or the 10 ohm dummy load, for proper behavior of the amp and to prevent damage. You can easily add a switch to select between the organ internal speaker or dummy load for when you don't want to use the Leslie

On the power wiring, I know they originally ran the AC power in the same cable as the audio and switch wires. Nowadays and speaking from my experience with modern systems it is generally considered a "bad idea" to run "AC power" in the same cable as "signal". For example, if the cable was accidentally crushed an AC power wire could become shorted to a signal wire causing the organ chassis to become "hot" and a dangerous shock hazard, and/or possibly blow the snot out of your amp(s). If I was setting this up I would use a separate cable to power the Leslie which would then plug into its own socket in the organ. A little more hassle to build but a safer design.

[enor]

[ATTACH=CONFIG]30347[/ATTACH]

So I have set up a type of a schematic..
Does it seem correct? I assume that the resistor is on the red wire to Pin 2?

I read in this thread https://organforum.com/forums/showth...lie+770+hookup that Brendon Wright recommended to use a seperate AC Power to the Leslie and not to go trough the 9-pin cable, while andyg suggested to feed the 760/770 with AC directly to Pins 8 and 9.

What are your thoughts?

And will the internal speakers sound while I play trough the Leslie? Do I need a MEE switch?


Thanks alot for your feedbacks!

The resistor goes across your hot speaker signal and ground. It is there to replace the speaker (if you choose to disconnect it), as the amp in the organ must see a load at all times.

If you leave the speaker in the organ connected (so that it sounds together with the Leslie) you can omit the resistor altogether. Do you want the organ to play with the Leslie or not? It's really just a matter of taste.

Regarding AC to the Leslie: Here in Sweden, 760s were equipped with separate mains cords when sold new. I'm guessing it was the same in Norway; and if so - no need for AC at the 9-pin connector.

[Runar]

The resistor goes across your hot speaker signal and ground. It is there to replace the speaker (if you choose to disconnect it), as the amp in the organ must see a load at all times.

If you leave the speaker in the organ connected (so that it sounds together with the Leslie) you can omit the resistor altogether. Do you want the organ to play with the Leslie or not? It's really just a matter of taste.

Regarding AC to the Leslie: Here in Sweden, 760s were equipped with separate mains cords when sold new. I'm guessing it was the same in Norway; and if so - no need for AC at the 9-pin connector.

Ok. So like this then?



No I do not want the internal speakers to sound together with the Leslie. I just wondered if it was possible with a MEE so that I could choose between the speakers.

If this is the correct wiring than it should be a easy fix.

[enor]

Ok. So like this then?

[ATTACH=CONFIG]30356[/ATTACH]

No I do not want the internal speakers to sound together with the Leslie. I just wondered if it was possible with a MEE so that I could choose between the speakers.

If this is the correct wiring than it should be a easy fix.

Instead of the MEE, I usually just do a switch that lets me turn off or on the internal speakers. It's a much simpler circuit and I figure - IF, for some reason, I want to play without the Leslie ... why not just unplug it (or turn it off - my Leslies all have separate power cords and switches).



- - - Updated - - -

... and, as you can clearly see from that last post: I got considerably worse grades in arts class, than in ... most other classes, save sports. ;)

[Runar]

Instead of the MEE, I usually just do a switch that lets me turn off or on the internal speakers. It's a much simpler circuit and I figure - IF, for some reason, I want to play without the Leslie ... why not just unplug it (or turn it off - my Leslies all have separate power cords and switches).

[ATTACH=CONFIG]30357[/ATTACH]

- - - Updated - - -

... and, as you can clearly see from that last post: I got considerably worse grades in arts class, than in ... most other classes, save sports. ;)

Hehe!
Let's see if I have understood right now.



How does this look??

[joecool240]

Regarding AC to the Leslie: Here in Sweden, 760s were equipped with separate mains cords when sold new. I'm guessing it was the same in Norway; and if so - no need for AC at the 9-pin connector.

Enor, just curious about the Sweden 760's, is there a mains power switch on the cabinet? (I don't think it has remote turn on like the 11 pin Leslies)

Joe

[tpappano]

Wow, strange how things happen! Yesterday I lamented not having any "Leslie experience", tomorrow it seems I become the owner of a pair each of 720 and 540 speakers being decommissioned from a church! So expect some questions soon...