Hammond CV "F" pedal lowwer octave contact problem

[Guest]

Hello everyone,</p>

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My "F" lowwest octave pedal went out while I was practicing on my CV today. It sounds as if only one harmonic is making contact. It does not sound as deep as the other notes in this lower octave. All the felts are in place. I depressed it with my finger and there is only one harmonic. How do I trouble shoot this problem and track down where I need to fix it? </p>

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thanks everyone,</p>

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[Model E & Me]

Re: Hammond CV &quot;F&quot; pedal lowwer octave contact problem

If it just all of a sudden went out, and all the others are all right, it could well be a mechanical problem with the switch actuator for that note. Its not likely that all of a sudden the contacts got dirtyor all the wires except one broke. That is the kind of repair for which I'd seek out a competent (and reasonably priced) technician.

[geoelectro]

Re: Hammond CV &quot;F&quot; pedal lowwer octave contact problem



Try shifting the pedal busbars. Screw on the treble end of the switch assembly. Sounds like the 16' tone dropped off. It may be the wire soldered to the contact itself. One has to remove the pedals, remove the switch assembly, remove the cover on the back and troubleshhot the contact wires for that pedal. If a loose one is found, one can solder it back to the contact.</p>

I usually do this with the organ running so I can know when I get it fixed.</p>

George
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[Guest]

Re: Hammond CV &quot;F&quot; pedal lowwer octave contact problem



Hello George,</p>

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Thanks for your comment and help with my problem with the F pedal. I took a look at the contacts today and found that there is two contacts for each note. Both contacts are soldered on and I resoldered them to make sure they were making contact. I still have the same problem. The sub low is not sounding. It sounds rather odd to hear all the other notes in this low octave with a deep bass and then hearing the "F" note without it. I left the pedals disassembled until i can get it fix. Is there a pedals specialist in the house? Please help.</p>

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thanks,</p>

joseph
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[geoelectro]

Re: Hammond CV &quot;F&quot; pedal lowwer octave contact problem



I may have overlooked the first step here. Have you checked to make sure the "F" pitch is in fact at the generator and that the wire for the pedals is connected?
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It should be more like 8 contacts per note. 4 contacts for the 16' and 4 for the 8'. I usually press the contact and with a pick tool, push each individual contact until it goes off to make sure I hear a tone drop out on each one. You could also try this.</p>

Clip a wire onto the preset panel about half way up on one of the bars. Take the other end and touch it to each contact at their rear where the wire connects. You should hear each tone of each contact. See if you have a dead one.</p>

George
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[Guest]

Re: Hammond CV &quot;F&quot; pedal lowwer octave contact problem



Thanks,</p>

I checked the generator and all the notes are good. I went back to the pedal assembly and check each leaf contact. Only 7 leafs work. There are 4 for each side, all 4 of the 8' leaf contacts work. Only 3 work on the 16' side. The 3 upper contacts work but the lowest contact (closest to the floor) does not sound and that one is the sub low that is missing. So the problem is narrowed down to that one leaf. How do i get it to work?</p>

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Your a blessing George,</p>

joseph
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[geoelectro]

Re: Hammond CV &quot;F&quot; pedal lowwer octave contact problem



There is a terminal strip in the pedal switch assembly that each tone arrives on from the generator. Find the "F" terminal and test if there is signal there using the same method as testing the generator outputs.
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If the wire connected to the contact has no sound, but it is available at the terminal, there is a break in the resistive wire somewhere. Since the wires are very small and in a very congested loom, this is a way to get it going. </p>

Take a small guage wire and connect one end to the the contact and the other end to the "F" terminal. This should give you your missing tone BUT, it will be too loud. This is because the small original wire is resistive. The new wire added will not have this resistance. So, you will next need to cut the new wire in a place where you can physically add a resistor. Any 1/8 to 1/2 watt resistor will do. As for value, you will be looking at about 220 ohms to 470 ohms. Could be a little different from that as each note has its own resistance. I use a resistor decade box and dial in a value. Then I play the notes on either side ("E" &amp; "F#") to make sure the volume is consistent. If not, I adjust the decade box until it is. If you start with the values I mentioned, you should be close. Solder it in ... done.</p>

George
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