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Is the speaker wire to this 500B hooked up right?

D

dschwab

Active Member
Hello,

Just wondering if this looks right. Any help much appreciated. Also, I'm assuming that "channel A" is for the right/positive IC and "channel B" for the white/neutral, is that right? Here is how I have my 500B hooked up (for 8 ohms):

P1010537.jpg
 
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cant see where the wires are going plus you may have a short on the top row .. best to use loop terminals on them all .
 
Well, the top row "8" is going to the positive on my left speaker while the top row "GND" is going to the negative on my left speaker.

The bottom row "8" blue wire is from inside the receiver. The bottom row "GND" is going to the negative on my right speaker while the wire on the bottom left is going to the positive on my right speaker.
 
You can disconnect the wire with the blue lug. That is the tap for the phase reverse switch which you probably don't need. See the bottom of page 5 in the 1962 Executive VII service manual for a schematic. (Fisher used the 800B in that console.)

http://fisherconsoles.com/service manuals/FISHER EXECUTIVE VII 990 SM.pdf

Then just connect the speakers between the ground "G" and the correct ohm value for your speakers - in phase, of course. I would suggest crimping and soldering spade connectors to the end of your speaker wires so the loose strands of the copper conductor don't accidentally make contact with adjacent screws.
 
TheRed1 said:
You can disconnect the wire with the blue lug. That is the tap for the phase reverse switch which you probably don't need. See the bottom of page 5 in the 1962 Executive VII service manual for a schematic. (Fisher used the 800B in that console.)

http://fisherconsoles.com/service manuals/FISHER EXECUTIVE VII 990 SM.pdf

Then just connect the speakers between the ground "G" and the correct ohm value for your speakers - in phase, of course. I would suggest crimping and soldering spade connectors to the end of your speaker wires so the loose strands of the copper conductor don't accidentally make contact with adjacent screws.
Click to expand...

:thmbsp::thmbsp:
 
TheRed1 said:
You can disconnect the wire with the blue lug. That is the tap for the phase reverse switch which you probably don't need. See the bottom of page 5 in the 1962 Executive VII service manual for a schematic. (Fisher used the 800B in that console.)

http://fisherconsoles.com/service manuals/FISHER EXECUTIVE VII 990 SM.pdf

Then just connect the speakers between the ground "G" and the correct ohm value for your speakers - in phase, of course. I would suggest crimping and soldering spade connectors to the end of your speaker wires so the loose strands of the copper conductor don't accidentally make contact with adjacent screws.
Click to expand...

:thmbsp::thmbsp::music::thmbsp::thmbsp::music:

If you DO insist on connecting your wires bare, make sure the hook of wire goes to the right from the insulation. The Screw will bite into it and pull it tight in. The way you have it, the hook tends to open up and shorts happen. Use this method as a last resort. Crimp or solder spade connectors on the end of your wires. keeps output transformers and output tubes healthy.

Larry
 
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Thanks much!

I'll just unplug the blue wire, keep the phase selector switch to "off" and be very careful to not have speaker wire touching adjacent screws until I can get some connectors soldered on. This simplifies it. Appreciate the help.
 
Also an old trick when using stranded wire around a screw lug, always twist the strands counter clockwise instead of clockwise and then bend them into a tight hook and then tighten the screw. By doing that it helps avoid the wire from becomeing un-twisted when tightening the screw. Use this same trick when wiring recepticals and switches when wiring a home. But as stated, always put the wire under the screw so that when you tighten the screw it pulls the wire around the screw so you would want to put the wire on the left side of the terminal so the end of the strands are on the right side. But on an amp like the others stated, use a crimp terminal remove the plastic crimp, solder, and I wouldn't recommend a ring terminal but the spade ones, and I like ones which on the end of the spades, have a little kick up on them so even if the screw was not all the way tight, it wouldn't slip down.
 
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Yeah, thanks for that little tip.

Also, for those of you rightly expressing concern with the shoddy way my speaker wire is hooked up, please rest assured that that is not how I had it when I actually had speakers hooked up to it. I'm relocating the Fisher (from the man cave to the living room....it has earned a place in the spotlight and for more folks to revel in its glory) and I sort rush-connected the wire just for the photo.

G'day Fisher fans.
 
Just Reinforcement. I use bare wire all the time due to the various receivers, amps, and speakers I have. I tin mine 1st, then shape them around a round screwdriver shaft. Too cheap to pay for a 1/2 dozen spade lugs and too lazy to drive to Home depot or RatShack.

Larry
 
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