Schober Organ Notes No. 95

The STOP SWITCH marked HV EFFECTS when ON connects either or both manuals to this section depending on whether they are selected by the first 2 switches. From left to right switches are:

1. Connects SOLO manual

2. Connects ACCOMPANIMENT manual

NOTE: If both SOLO AND ACCOMPANIMENT switches are ON the SOLO KEY DOWN signal has preference in starting the AUTOWAH - ROUND TRIP & BRASS functions.

3. MAN WAH -- Effect (sound) varied with potentiometer

4. WAH-1 (AUTO WAH) -- Effect (speed) varied with potentiometer

5. WAH-2 (ROUND TRIP) -- Effect (speed) varied with potentiometer

6. WAH-3 (CONTINUOUS WAH) -- Effect (speed) varied with potentiometer.

7. BRASS

Only one of switches 3-4-5-6-7 active at any time. The higher number switch takes preference, e.g., switch 7 takes preference over 3-4-5-6 and turns their LED off if switch is on. If any of switches 3-4-5-6-7 are ON the selected effect operates. If all are OFF they are bypassed. Sound then goes to switches 8-9-10-11

8. HEV-1 -- Slow speed LESLIE

9. HEV-2 -- 2nd speed LESLIE

10. HEV-3 -- 3rd speed LESLIE

11. HEV-4 -- top speed LESLIE

With any one switch ON 8-9-10-11 then if a second of these switches are turned on the LESLIE effect will be DEEPER. If any switch 8-9-10-11 is ON the selected effect operates. If all of these switches are OFF they are by passed.

HV EFFECTS0005_4_2.JPG ~V drawing of HV LESLIE ~V SCHEMATIC - 3

HV EFFECTS0006_5_2.JPG ~V drawing of HV ~V WAH 1

HV EFFECTS0007_6_1.JPG ~V drawing of HV ~V WAH 2

HV EFFECTS0008_7_2.JPG ~V drawing of 20ms DELAY page 1

HV EFFECTS0009_8_2.JPG ~V drawing of 20ms DELAY page 2

HV EFFECTS0010_12.JPG ~V drawing of 20ms DELAY page 3

HV EFFECTS002_1_3.JPG ~V drawing of HV EFFECTS SWITCH ~V RELAY ~V SCHEMATIC

HV EFFECTS0003_2_3.JPG ~V drawing of HV ~V LESLIE 4 ~V CONTROL ~V SCHEMATIC -

1 KEY DOWN0001_9.JPG ~V drawing of KEY DOWN ~V VIBRATO ~V SOFT ATTACK SCHEMATIC

TONE POTS

On top of the lid is the TONE POTS. It consists of 9 potentiometers (photo IMG_0051_2_8.JPG*) and seven segment displays and a switch to have them in or out of service. I should have called them TIBIA POTS as I have used the TIBIA filter for them. When potentiometers are operated indication is given from 0 to 7 on the displays which is the strength of analogue signal being used. The first two starting from the left are PEDAL 16' and 8'. The next two are the ACCOMP. 8' and 4' and the last five are SOLO 16', 8', 4', 2' & 1'. There input comes from the BUS AMPLIFIER. When the switch is turned on the only stop switches that work are the PERCUSSION. The effects such as VIBRATO and HV EFFECTS still work. In other words they work like drawbars on a HAMMOND organ. One can get a great variety of sounds from them including a very loud TIBIA. The PCB's for them are mounted under the lid as on photo IMG_0008_11.JPG. TOP OCTAVE & TONE GENERATORS

First you need 2 MHz oscillator to provide the input to TOP OCTAVE GENERATOR. The outputs of it (C to B) are fed to the 12 TONE GENERATORS. They in turn produce all the tones for the keys on the keyboards and 8' tones on the pedal board. I produce the 16' tones on it by dividing each tone by 2.

2 MHz OSCILLATOR (required for input to TOP OCTAVE GENERATOR)

TOP OCTAVE GENERATOR ~V 3 ~V HV

TOP OCTAVE GENERATOR ~V 4 ~V HV

TOP OCTAVE GENERATOR PCB ~V HV

TONE GENERATOR SCHEMATIC ~V HV

TONE GENERATOR PCB ~V HV

TONE GENERATOR CALCULATIONS

FREQUENCY ERRORS WITH

Using OSCILLATOR and TOP OCTAVE GENERATOR the relationship between all top octave notes remain the same. Always in tune no adjustment required. To work in with above have designed the TONE GENERATOR PCB also for the lower octaves.

BALANCE - VIBRATO SELECT RELAYS

VIBRATO SCHEMATIC

Replaces rotary switches.

MIXER

For Pedal Percussion voices, Special Effects, Cassette, Toy Counter & Microphone.

PLAYTHINGS

I have been looking at adding lights to the Schober like the Compton Theatre Organ used to have. Decided adding these Jelly Moulds to it would be impracticable and too big a job for me now, so I looked at alternatives. There are different types of lights available and decided on 20mm LEDS that were available in four colors, being RED, GREEN, YELLOW & BLUE. These I have mounted on both sides of the organ at the front, the only place I could find suitable. One can select by rotary switch to have them OFF, either ON. Also, there are two more positions where you can select either R,G,Y,B or R,Y,G,B. Then, with these last two positions, as you play the organ they will start rotating colors in order selected. The louder you play the faster colors will rotate. That's my answer to the Compton~Rs Jelly Moulds for the Schober. The photos are: Colored lights 0001_1_4; 0002_2_2; 0003_2_2*; 0004_4_2; 0005_5_2; 0006_6_2.

NOTE: The photos mentioned are available. The schematics will be available -- Harry Valentine is sending them to me via snail mail as the e-mailed versions were not sharp enough to read well. If you are interested in schematics send a SASE and an extra stamp for four. For more than four, adjust postage and send extra stamps. For COLOR photos, please send a SASE and an extra stamp for two Pages. I can print either 1 or 4 to a page

When we were married in 1947 she was a pianist and happily accompanied me in trumpet recitals. She hated to become an "orchestra widow" since I was playing somewhere four or five nights a week, so she took up the oboe. This worked well for a number of years until she developed an incurable ear disease and that was the end of the oboe and accompanying the trumpet. Surprisingly the sound of an organ did not make her dizzy. Two of my sons were in amateur radio so it was not long before we had the Schober kit spread out and in a couple of months she had her first organ lesson in 1970.

My father was a church organist and recitalist and I can remember in 1927 he was playing for the dedication of a convention center down South and the page turner didn't show up. He turned to me, an eleven year old, and said "Climb up on the bench with me and turn the pages". I have been an organ lover ever since. When he went out of town I, knowing where the power key was hidden, would go up in the church and be a one finger player. I never got caught.

What is all this leading up to, you ask?

Now in the year 2006 I am putting a 3600 pipe "Moeller" Organ in our new church. I am just providing the cash while one of my sons is doing the electrical and computer work, having redesigned the console from pneumatic operation. A local organ company is doing the re-building. I am sure that after the next six months he would be willing to discuss the technical side of the project with any reader interested. We are both determined that when this project is completed we will get our Schober, which gave such pleasure to us all, back into shape even if we have to get a friend to play it.

INTERESTING LINKS:
   http://www.virtualorgan.com/RunScript.asp?p=ASP\Pg0 .asp
   http://www.milandigitalaudio.com/listen.htm

Cy has taken the original books and scanned them into his Apple Macintosh computer for printing, and then bound them into a single volume with dividers and spiral binding so they lay flat on the music rack. The records have been remastered onto a CD of very high audio quality that sounds much better than the original records. The work is well worth the asking price of forty dollars and it is highly recommended. This text and CD will be the standard study material for the Academy during the year of 2006. This will be the year when we all dig in and learn about "The Horseshoe Sound" from the legendary organ teacher, William McMains.

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I don't know how large the ad will be but I'll give you all the information I can. A little history: I acquired the organ from a fellow employee. It was in his storage room for about 15 years and he needed the room. It was never completed fully and I have the talent to do such things. I replaced all the old type transistors, capacitors and had the reverb aligned. I have added a few things but not to take away from the nice instrument it is. I work full time and am home about 4:30 pm 5 days a week. Usually not home Sat. but Sunday all day. It is located in Littlestown, PA 2 miles from the border of Md. and mid-state near interstate #15 close to Gettysburg. Contact: Ronald. Telephone: (717)-359-9293, rond@superpa.net