Couple of questions...

[Nullifier]

Yesterday I was practicing on my "new" T12 and suddenly there was a pop and then no sound. After checking out the probelm I realized that the speakers would turn and the pilot light was on so I pulled the speaker cabinet out and noticed the what looks like heavy duty pegboard was laying on the floor and the audio cable plug was pulled away. THere was some light duty tape on the plug to hold it in place so I put the tape on the plug again.

So, I put the pegboard back up and used the fastners to lock it in place but before I got the cabinet back against the wall the pegboard fell out of place and on the floor so I got some high quality metal back duct tape from the shop and taped the pegboard so it COULDN"T fall out again.

One question is can I use the metal backed tape to secure the audio plug?? Question number two is what are the two resistor looking devices on the back side of the pegboard??

Also, there are three chassis inside the speaker cabinet. One would be the amp but what are the others?? Oh, one more.....where do I find replacement caps....just in case??

[Nullifier]

Another question...

I couldn't figure out how to edit my other post so I made this one to ask what type of oil does one use on the Allen gyroscopic speakers??

[jbird604]

If you're talking about the front and rear bearings of the gyro units themselves (the shafts that the big round plywood baffles turn on) -- as I recall, the bearings call for a drop or two of motor oil now and then. I seem to recall some warning on a label in the cabinet about not over-oiliing. I have seen scores of these things that never got oiled in their 40 years of service, but some I've seen with an oil cup, so perhaps there were different types used. Look around inside the cabinet and see if there is any indication.

If you're talking about motors, there again some require oiling and some don't. I suppose some motors will have a metal tag that specifies the oil to be used. If there is no oil cup, no oiling is required. The small blue motors that look like Hammond "L" motors would probably want a light oil such as three-in-one. The large heavy DC motors used in variable speed gyros might require a heavier oil such as 20W motor oil. Wish I could be more specific. Will be interested to see what others will post here.

[jbird604]

Inside the gyro cabinet, the three units are the amplifier, the motor control system (a big DC power supply with adjustable voltages, feeds DC to the motor that turns the gyro and has probably 3 different voltages it can supply so the motor can turn slowly, a little faster for a celeste effect, and fast for tremulant), and finally the power relay, which receives a turn-on signal from the organ and in turn connects the motor and amp to AC power. Not all gyros have that power relay, though, so you might have something else in there, perhaps some accessory a former owner installed.

Your description of a pegboard with resistors on it doesn't ring a bell with me. I've seen a lot of T-12's but I don't know what you have there. Perhaps this organ has been customized to some extent in the past or a tech has done some kind of unusual repair due to the difficulty of getting some of the parts.

I'd say it's OK to use metal back tape as long as it doesn't touch anything in the cabinet that's carrying any current such as any part of the audio amp or motor control unit. Be especially sure that it doesn't touch any terminals or electrical connections on the amp or the motor control.

Hope this helps. Wish I could see the unit and be more certain. post a pic if you can.

[Admin]

Nullifier:

You're likely to get more responses and more people will benefit from the answers to your posts if your title provides even a bit of clue of what you're discussing in your thread.