Schober Organ Notes No. 81
Disclaimer: We accept no responsibility for any unfavorable
consequences resulting from following our advice
I hope that you all had a great summer. I am still in Vermont because of
matters and problems that I have to take care of here, so unfortunately
I again have to postpone publishing the photos of the Reverbatape conversions
to an endless loop made from an eight track tape cartridge. Warren Jones
who made one of the conversions kindly sent me a second set of photos one
of which was supposed to share a page with a photo of my conversion. Unfortunately
some of my material is here, some in NY and I want to publish both photos
on one page since color copies are costly, consequently the delay. I also
have to postpone the article about Jim Ramsey. I want to run it past Laura
Ramsey, and again because my materials are kept at two different places,
I cannot find her new address. Does anyone have it? Her address used to
be in New Jersey, now it's in Connecticut, but I don't have it here. If
anyone has it, please let me know what it is.
Because of matters that I have to address here, this issue will again
be a little late. In the future I will try to get Organ Notes into the
mail in a more timely manner. You should know that any delay is strictly
my responsibility. If you have any questions about when ON will be sent
out please contact me. Again I also want to ask you to contact me if I
don't get back to you on any question or request. The reason is that I
tend to lose notes or forget things because of the two locations that I
SASE'S AND SUBSCRIPTIONS
When you send me SASE's, please don't forget to put the stamps on the envelope
and also send three extra stamps (for copying costs). If you forget either
the three extra stamps, or if you forget to stamp the SASE's, I will let
you know in a note with your next copy of Organ Notes. I won't send a separate
letter as it does not pay to use one stamp to ask for three. I also want
to mention that I will get your mail whether it is mailed to my NY or VT
address, however depending on where I am, it might take several weeks for
mail to reach me. If writing SASE's is a problem, you can just send me
a check (the amount is on your "SASE's DUE NOTICE").
When Schober changed from an long endless loop cartridge to the 19" loop,
they said in their literature that this loop was made of special tape and
that the "splice" was welded. Here is what they said: It's from 24RVSMA3
(1968) and 24RVSM3 (1965), THE SCHOBER REVERBATAPE UNIT RV-3 SERVICE MANUAL.
In part ". . . The Schober Tape Loop TL-3 is made of a very special tape
on which the magnetic oxide is held in an exceptionally strong binder.
The wearing away of the oxide during the life of the tape is a very slow
process, and when it does come off it "dusts" instead of forming a "gunk".
This prevents lost oxide from clogging the heads and gumming up other parts
of the machine. The oxide dust will stay on areas of the upper faces of
the magnetic heads that the tape does not contact. However, unless there
is an enormous buildup of oxide, none will remain where the tape actually
touches the head face at the gap or working area.
"The tape loops are treated with a special lubricant for
long life. This treatment may give some areas on the tape an oily appearance.
This is normal. The treatment is not oil. Do not try to wipe it off.
"The splice in the tape is made by a special "welding"
process which, unlike splicing tape, does not increase the thickness of
the tape at the splice point and will not gradually pull apart or "cold
flow" due to the constant tension on the tape. The tape is smooth and not
stiffened at the splice point, so that it flows through the machine as
though it were made as one continuous loop. (To our knowledge, no tape
manufacturer is actually able to make an endless loop. ) The oxide at the
splice point is smooth and continuous, minimizing the possibility of a
"dropout" every time the splice passes over the magnetic heads. . .
"I was trying to find out what tape they used and also
how to weld it. Since our member Warren Jones has done such a great job
with the making of air bags for the Theatre Schober "puff of air" presets,
I thought I would ask him. His reply was that he did not know Schober had
"welded" the loops and that the loops he purchased in 1973 were spliced
in the standard way (with splicing tape).
From correspondence between Walter E. Arnoldi and Schober in 1968 I
found that Walter had complained about the weld in some of his TL-3 tape
loops which had failed after only a few hours of service, whereas those
where the weld did not fail, lasted for over 700 hours. In correspondence
of 1970 I see that Walter was sent TL-3S loops (standard splice, no longer
welded). These were supposed to be changed every 100 hours. They were "sandwich"
type tape and supposed to eliminate wear to the tape heads. Walter found
that three out of five of these new loops were poor in that they left something
(invisible) on the heads immediately which severely decreased output of
the Reverbatape. Schober could not explain the problem. Walter tested more
loops and Schober seems to have fixed the problem. It seems that Schober
gave up on the weld and the long life tape and switched to a "sandwich"
tape where the oxide is coated with a thin coat of plastic so as to avoid
the oxide from wearing down the head. The disadvantage is that the plastic
wears off and the tape has to be replaced more often. I would guess that
the first batch of the new loops that Walter got had a problem with the
coating. Today's audio tape is of the sandwich type, so making loops from
standard tape of today seems to be OK.
Editor: Alexander Kruedener, 161 East 89 Street, Apt. 4E, New York,
NY 10128, (212) 831-0662. Kruedener@juno. com
ORGAN NOTES FOR SCHOBER ORPHANS AND FRIENDS Issue #81
Fred Henn Founder & Headmaster Emeritus
EDITOR Alex Kruedener kruedener@juno. com
FORMATTING Bill Kohrumel bk3@usmo. com
EMAIL Jack D. Gildar JDgildar@juno. com
Schober Organ Orphans' Page: http://www. users. cloud9. net/~pastark/schober.