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Summary of Responses about FM recorders for data recording

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  • Summary of Responses about FM recorders for data recording

    Dear All,

    Here are the responses to my posting on FM recorders:

    First the original posting

    Original posting:

    > would anybody know of any Battery Operated FM Tape Recorders
    > which we can use for data recording.
    > our requirements are
    > Frequency Response DC to 10Hz
    > No. of Channels 3
    > Capacity 3 Hours
    > Any response to give us a starting point would be appreciated.



    Have you check the medilog system made in england I believe.
    There may be also newer technology that save the information
    in memory to be down loaded later on. Isotechnologies Inc
    makes a system; 919 732 2100 tel; 919 732 9614 fax.


    From: Paul Guy

    If you can afford them, a good starting point would be TEAC. From
    their '92 catalogue (now probably the products are cheaper, and/or have
    better 'specs) a recorder that has what you want is the 8 channel DAT
    recorder, model RD-180T with an option (LP-200) to give longer record times
    (3,6,12 hrs) than the normal 2 hours. Frequency response is DC-10kHz
    with 4 channels, 2 hr recording time. It will be proportionaly less as
    the recording times increase. I saw one of these units at a trade show,
    I was impressed with the performance, and flabbergasted at the price.
    Their address is:
    TEAC America,Inc
    7733 Telegraph Road,
    California 90640, USA

    TEAC Deutschland Gmbh (ICPD Division)
    Arzbergerstr.10 D-8036 Herrsching, F.R. Germany
    tel:08152-37080 fax:08152-370826

    These are from a '92 catalogue, so they may have changed by now.


    Paul J Guy work phone:519-885-1211 ext 6371 home/FAX/:519-576-3090 64 Mt.Hope St.,Kitchener,Ontario,Canada

    ************************************************** ***********

    From: "M.H. SHEREBRIN"

    I have had my fourth year biophysics class building a voltage to freq
    converter and then a frequency to voltage module that makes use
    of any tape recorder to record and play back 0 - 10 kHz signals.
    Ask any electronic techie about chips for v/f and f/v. They really
    make the job simple and low cost but with surprisingly good results.

    If you want more details see Horowitz and Hill The Art of Electronics,
    2 nd edition, Cambridge U Press. Any linear IC data book also has
    example circuits. You can then get a four channel professional
    tape recorder for much less than an FM instrumentation model.

    A few companies have converted super vhs video recorders to do the same.
    I may still have the data sheet around somewhere but they cost >$2500 US.
    Compare this to about $500 plus labor for the home built one.

    Hope this helps

    M. H. Sherebrin
    Associate Professor
    Dept. of Medical Biophysics
    Univ. of Western Ontario
    London, Ontario, Canada N6A 5C1



    From: VAXB::CLFR54 "S.G.ZACHARIAH" 8-NOV-1994 16:19:27.57

    Have you had a look at recorders for 24 hours ECGs. I think they are called
    HOLTER recorders?


    ************************************************** ***

    From: Tim Bach

    Hi Hamid!

    We use Teac R61 cassette tape recorders. These recorders have 4 FM channels
    with a voice channel recorded on top of one channel. They're battery
    operated but are limited to 30 to 45 minutes recording time.
    Approximate cost: $2000.00

    Good luck.
    Tim Bach.

    | Timothy M. Bach, PhD
    | Senior Lecturer in Biomechanics
    | School of Human Biosciences
    | Faculty of Health Sciences, La Trobe University
    | Street Address: 607 Swanston Street, Carlton, VIC, Australia
    | Postal Address: Locked Bag 12, Carlton South, 3053, Australia
    | Phone: +61 3 285-5311
    | FAX: +61 3 285-5184

    ************************************************** *************

    From: "Martin Bilodeau"

    TEAC Corporation has a few models of FM tape recorders that allow to record
    up to 7 channels for several hours.

    TEAC Corporation
    3-7-3, Naka-cho, Musashino
    Tokyo, Japan
    Phone: (0422) 53-1111

    TEAC Corporation of America
    7733 Telegraph Road
    Montebello, California 90640
    Phone: (213) 726-0303


    Martin Bilodeau
    Martin Bilodeau
    Department of Biomedial Engineering (Wb3)
    The Cleveland Clinic Foundation
    9500 Euclid Avenue
    Cleveland, Ohio 44195-5254
    Tel.: (216) 445-7450 or 9341
    FAX.: (216) 444-9198

    ************************************************** ****

    From: M E Jackson

    There is a peice of equipment used by film companies on location
    It is called a NAGRA . They are precision audio recordors made in Switzerland
    What do you mean by FM. This machine will record audio , therefore it will
    record a sine
    wave , up to 20 kHz with no problems.
    You can anylise the output on a scope perhaps?.
    It uses about 10 'D' size cells in about 10 hours.
    It will ( I think ) record 4 channels at the same time
    The tape speed can be selected for various 'inches per second'
    and so it may record up to 3 hours.
    The unfortunatly are not cheap , I think they are about 8,000 quid
    each. If you want to know more then wrie me.

    Matt Jackson
    Bath University.

    From: Wim Groeneveld

    Dear Hamid,

    Concerning your request for info on FM tape recorders I have the
    following information for you:
    At our lab we have two types of these recorders for ambulatory
    monitoring. First there are Medilog 4-24 recorders from Oxford
    Medical Systems. Second we have a 7-ch FM recorder from TEAC (MR-30)
    (TEAC also has a 4-ch version, MR- 10). Both recorders meet your
    requirements. Disadvantage of this type of recorders is that they
    require a separate (expensive) replay unit to reproduce the
    recorded data. Apart from this disadvantage, the Medilog 4-24 series
    are outdated and replaced by newer series, question rises; why bother
    looking for small tape recorders if there are solid-state recorders
    from which you can directly download the acquired signals in a
    digitised form into a PC for further processing and analysis?
    An overview of available portable data recorders (including the
    digital versions) was published as output from a European project
    CAMARC (deliverable N 10). It is too much to send along a copy,
    however, one of the participants in the project and currently working
    with one of this kind of digital recorders that was developed at my
    department, is close-by I presume from reading your e-mail address.
    Try to contact prof. J.P. Paul or one of his co-workers at the Univ.
    of Strathclyde, Bioengineering Unit, Wolfson Centre, Glasgow. tel.
    041- 552 4400 and ask if they can provide the information. If not,
    just let me know.

    I hope that this is of some help.


    Wim Groeneveld
    Dept. of Biomedical Physics and Technology
    Erasmus University Rotterdam
    The Netherlands
    tel: +31 10 4087353
    fax: +31 10 4363203