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S.rassoulian
11-23-1994, 12:45 AM
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.



Responses:


*************************************************
From: parnianpour@ccl2.eng.ohio-state.edu

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.
mohamad


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

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,
Montebello,
California 90640, USA
tel:213-726-0303,Fax:213-727-7621

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

-----------------------------------------------------------------------------
Paul J Guy work phone:519-885-1211 ext 6371
paul@gaitlab1.uwaterloo.ca home/FAX/:519-576-3090
pguy@healthy.uwaterloo.ca 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

email: sherebrin@uwovax.uwo.ca

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

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?

Zach

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

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
U.S.A.
Phone: (213) 726-0303


Sincerely,

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

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

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.

Regards,


Wim Groeneveld
Dept. of Biomedical Physics and Technology
Erasmus University Rotterdam
The Netherlands
tel: +31 10 4087353
fax: +31 10 4363203
e-mail: GROENEVELD@BNT.FGG.EUR.NL