HI all, new here. I bought a Packard Bell amp and preamp/receiver. I removed the Garrard AT6 turntable. The turntable switch has to be turned on when it is is the phono or tape mode in order to turn on the preamp/receiver. Could one of you tell me how to jump the Amplok connector that comes from the preamp/receiver so that it turns on and bypasses the turntable switch. The turntable wires that go into the turntable switch are: Brown on one side of the switch and red and black to the other side of the switch. The wires on the female amplok connector on the turntable are in this order? black, red, brown, and green. The male amplok connector from the preamp/receiver that I want to jump has wires in this order: red, brown, brown and white, and green. Thanks in advance!
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How do I jump the Amplok connector to turn on the Preamp/receiver?
- Thread starter BruceVB
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If I were to guess, I’d say the middle two need to be jumped.
If I were to measure, I’d set the meter to AC 120 volts. Disregard the green/ground. You should get wall voltage between two of the connectors, while the third one has no voltage on it. Thats the one that came from where the switch used to be. Jumper that one to the hot terminal next to it and you should get power to the receiver.
If I were to measure, I’d set the meter to AC 120 volts. Disregard the green/ground. You should get wall voltage between two of the connectors, while the third one has no voltage on it. Thats the one that came from where the switch used to be. Jumper that one to the hot terminal next to it and you should get power to the receiver.
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[Thanks RWood, I got these values. Does this confirm your recommendation?
With the unit plugged in the power switch in the on position and the selector in the Tape position I got these values:
Red to Brown 0 volts
110 volts from Red to Brown/white.
90 volts (about) from red to green.
110 volts from Brn/white to Brown
0 volts from Brn/white to green.
With the power on and the selector in the FM radio position I got these values:
Red to Brn/w 110 volts
Red to Brn 0 volts
Red to green 90 volts
Brn to Brn/white 0 volts
Brn/w to green 0 volts
Brn to green 0 volts
The preamp/radio is Model 7TU12. I don't know what model the amp is.
="RWood, post: 16109865, member: 35266"]If I were to guess, I’d say the middle two need to be jumped.
If I were to measure, I’d set the meter to AC 120 volts. Disregard the green/ground. You should get wall voltage between two of the connectors, while the third one has no voltage on it. Thats the one that came from where the switch used to be. Jumper that one to the hot terminal next to it and you should get power to the receiver.[/QUOTE]
With the unit plugged in the power switch in the on position and the selector in the Tape position I got these values:
Red to Brown 0 volts
110 volts from Red to Brown/white.
90 volts (about) from red to green.
110 volts from Brn/white to Brown
0 volts from Brn/white to green.
With the power on and the selector in the FM radio position I got these values:
Red to Brn/w 110 volts
Red to Brn 0 volts
Red to green 90 volts
Brn to Brn/white 0 volts
Brn/w to green 0 volts
Brn to green 0 volts
The preamp/radio is Model 7TU12. I don't know what model the amp is.
="RWood, post: 16109865, member: 35266"]If I were to guess, I’d say the middle two need to be jumped.
If I were to measure, I’d set the meter to AC 120 volts. Disregard the green/ground. You should get wall voltage between two of the connectors, while the third one has no voltage on it. Thats the one that came from where the switch used to be. Jumper that one to the hot terminal next to it and you should get power to the receiver.[/QUOTE]
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likebike23
Addicted Member
If I'm not mistaken the turntable on/off switch will provide power to the amp when the turntable is turned on and will power the amp down when the turntable shuts off. If you just jumper the wires then the amp could theoretically be on all the time. You may need to add a power switch to that circuit in order to turn the amp off in phono mode.
I have a Garrard AT6 at home I can look at later to give you an idea of how you might need to wire it up.
I have a Garrard AT6 at home I can look at later to give you an idea of how you might need to wire it up.
cademan
Lunatic Member
Without a schematic, I think the easiest thing to do would be to follow the switch wires on the turntable.
One will go to the motor and one on the same wire will go to the amp.
Plug in the amplock connector to the turntable and just follow which wires go to the switch and which ones go to the amp.
Lets see a pic of the underside of the tuner. It cannot be that the turntable has to be on for the tape input to work.
What state are you in? Can someone nearby from AK help you?
If you send it to me and pay shipping both ways, I'll do it for free.
One will go to the motor and one on the same wire will go to the amp.
Plug in the amplock connector to the turntable and just follow which wires go to the switch and which ones go to the amp.
Lets see a pic of the underside of the tuner. It cannot be that the turntable has to be on for the tape input to work.
What state are you in? Can someone nearby from AK help you?
If you send it to me and pay shipping both ways, I'll do it for free.
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I actually think this job would he easier if you approach it from where the line cord comes into the receiver and jumper there. If you aren’t going to use a turntable, forget about the amploc.
Following the line cord into the unit you’ll see that one side connects to the power transformer primary wire 1. There will also be a connection to one of the amploc wires. This is the “always on” side of the wall voltage and is not one of the jumper points.
The other side of the line cord doesn’t connect to the power transformer primary wire 2 but is connected on a terminal strip along with one of the amploc wires. That wire is sending AC out and the terminal is one jumper point. This is the switched side of the wall voltage.
Find power transformer primary wire 2 and it should connect at a terminal to another of the amploc wires. That is AC return and this terminal is your other jumper point. Solder a wire between the two points and you will have eliminated the switch on the turntable.
We need clarification on whether there is a power switch on the receiver, too.
Your voltage readings didn’t make sense to me. Was the turntable plugged into the amploc?
Following the line cord into the unit you’ll see that one side connects to the power transformer primary wire 1. There will also be a connection to one of the amploc wires. This is the “always on” side of the wall voltage and is not one of the jumper points.
The other side of the line cord doesn’t connect to the power transformer primary wire 2 but is connected on a terminal strip along with one of the amploc wires. That wire is sending AC out and the terminal is one jumper point. This is the switched side of the wall voltage.
Find power transformer primary wire 2 and it should connect at a terminal to another of the amploc wires. That is AC return and this terminal is your other jumper point. Solder a wire between the two points and you will have eliminated the switch on the turntable.
We need clarification on whether there is a power switch on the receiver, too.
Your voltage readings didn’t make sense to me. Was the turntable plugged into the amploc?
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RWood, The voltages were taken from the Amplok connector that comes out of the preamp/receiver. The turntable wasn't connected. The measurements were with the preamp/receiver selector in two positions. One with the selector in the phono position with the unit plugged into the wall and the other with the selector in the FM radio position and the unit plugged into the wall. The power goes to the amplifier when the selector is in the FM position. The power doesn't go to the amplifier when the selector is in the phono position. Thanks for your input.
likebike23
Addicted Member
I took a look at the other posts you made in another thread. Someone put up a pic of a Schematic and I have to say, I'm not great at reading schematics without looking at the amp. I don't really know what is going on with that or if it is even your amp.
If it were mine I would consider wiring in a separate power switch for the phono selection. You could take whatever wire on the male amplok connector that corresponds to the brown wire on the female amplok connector and connect it to one side of the switch.
You could then take whatever wires on the male amplok connector correspond to the red and black wires on the female amplok connector and connect them to the other side of the switch.
In essence you would be recreating the power switch on the the turntable but without the turntable. I would route the wires under the chasis if I could and try to find a hole in the chasis I could mount the switch in. If there wasn't a hole already, you could drill one in a discreet place so it wouldn't be an eyesore.
Anyway, that's my idea. Is it the most technically correct way? Probably not, but it'll get the job done and I wouldnt have to pay someone else to do it.
[/QUOTE]
110 volts from Brn/white to Brown with the unit plugged in and the selector in the tape position. With the unit plugged in to the wall and the selector set to FM I get Brn to Brn/white 0 volts. Are these the two wire to jump together?
Thanks for the clarification. It sounds like there is additional power switching on the receiver. All you really wanna do is be able to turn it on regardless of source.
The switching scheme will add some complexity to what I described above but I stand by the notion that you would benefit from understanding what’s happening from the wall receptacle to the power transformer. Then you will be able to make it behave the way you want.
The switching scheme will add some complexity to what I described above but I stand by the notion that you would benefit from understanding what’s happening from the wall receptacle to the power transformer. Then you will be able to make it behave the way you want.
FlaCharlie
Super Member
It might be helpful to know what your intentions are. Do you plan to use the original TT? Replace it with a more modern one? Or eliminate it?
It seems (I'm guessing here) that you don't plan on using a TT but that you want to be able to use the Tape input but the turntable needs to be on to do so. (???)
I'm not sure why it's wired like that. Why would they require the TT to be turned on to use the Tape input???
Here's the schematic that was posted in the other thread:
No colors, but if you connect the middle two wires in the 4 pin connector on the far right that would be the same as if you had the TT turned on. It looks like the switch labelled S5 would still be used to turn power on and off to the unit as a whole.
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This is the turntable switch. Do I tie the red, black and brown wires together? IdoI took a look at the other posts you made in another thread. Someone put up a pic of a Schematic and I have to say, I'm not great at reading schematics without looking at the amp. I don't really know what is going on with that or if it is even your amp.
If it were mine I would consider wiring in a separate power switch for the phono selection. You could take whatever wire on the male amplok connector that corresponds to the brown wire on the female amplok connector and connect it to one side of the switch.
You could then take whatever wires on the male amplok connector correspond to the red and black wires on the female amplok connector and connect them to the other side of the switch.
In essence you would be recreating the power switch on the the turntable but without the turntable. I would route the wires under the chasis if I could and try to find a hole in the chasis I could mount the switch in. If there wasn't a hole already, you could drill one in a discreet place so it wouldn't be an eyesore.
Anyway, that's my idea. Is it the most technically correct way? Probably not, but it'll get the job done and I wouldnt have to pay someone else to do it.
