PORTABLE DECK BATTERIES 1st PAGE

<< Subj:  Excellent battery info!
Date: 98-02-08 17:26:21 EST
From: barry
To: GuySonic@AOL.Com

Leonard, thanks for the very informative info on NiMh batteries vs.
alkaline you posted on Dat-Heads!  I assume they'd be preferable for D7/D8
also?
 
------------
Barry B
Professor of Organizational Behavior
School of Business and Entrepreneurship
Nova S University
------------
>>

Hello Barry,

Thank you for the kind feedback. 

The D7/8 decks would benefit from these batteries also because they keep up the voltage throughout their capacity; makes the deck performance consistent.  However, there is an additional worry with maintenance and or reliability with rechargeable types
that makes them more trouble than just using alkaline.   

If you don't EVER overcharge the NiMH cells (they are without NiCD memory problems but damage by overcharge very easily), these cells can give you 3.5-4 hours of recording time and last for 200-300 charge cycles; best to run them mostly down before charge and be careful that power on the charger is not cut off and then on to start a new charge cycle. 

The D7/8 battery indicator will not give you much warning so be advised and carry some spare cells of any kind just in case.

My Web site has more general battery information that may also be useful.

Best Regards in Sound & Music Recording,
Leonard Lombardo, Sonic Studios(tm)..."Making Audio History With DSM(tm) Microphones"

====================================================================

Subj: Re: M1 Battery Pack
>>
From: Robert .edu>
Subject: M1 Battery Pack
Date: Wed, 11 Feb 1998 00:45:54 -0500 (EST)


I was curious if anyone constructed a battery pack for the Sony M1.  The
M1 requires 2 AA batteries...am I correct in assuming that a constructed
battery pack should have 2 D cell batteries to provide the correct amount
of voltage?  Does anyone know the part number at Radio Shack for the piece
that will connect the battery holder into the M1?  Any other suggestions?
Thanks for your help.

rob h

Date: 02/12/98
To: rih5

Hello Robert,

This has been discussed a few weeks ago but, you can use only 4 C or D alkaline cells for external connection and get 25 or over 50 hours of use!!.   For an already constructed system with DAT/Battery carrying case, see the Sonic Studios web site for pictures (good for DIY) and specifications on battery systems.  Using only 2 alkaline cells will not allow the deck to use all the capacity available in these cells and cut short the running time expected.  External 6 volt operation is safe for the D100/M1 decks and recommeded for best alkaline battery capacity usage.

Please remember that your battery Gage will not function entirely or properly when using these cells.... but will give you an all-of-a-sudden end of pack life indication that should give adequate warning for at least 15-45 minutes of continued running time.

Best Regards in Sound & Music Recording,
Leonard Lombardo, Sonic Studios(tm)..."Making Audio History With DSM(tm) Microphones"
TEL: 541-459-8839 /\ FAX: 541-459-8842 /\ USA Free: 1-877-347-6642

-------------------------------------------

<< Subject: Casio DA-7 has Sony sister unit?
From: David B ve.COM>
Date: Fri, 13 Feb 1998 10:21:28 -0500

In 1992, I purchased in Japan a Casio DA-7 portable DAT unit.  It
has provided years of good service, but unfortunately now
requires repair.  Problem is, no one here in Barcelona has parts
or expertise to repair a Casio DAT.  However, I seem to recall
that when I bought the unit, there was an absolutely identical
Sony model (looked like they had just slapped a Casio label on
the Sony, or vice versa) for sale.  If I can give them a model
number of the similar or identical Sony unit, then the local
Sony repair people are willing to have a go at repairing the
Casio.  Does anyone have any idea what model that may have been?
Alternatively, does anyone know where a Casio DAT can be sent for
repair, in Europe or in the U.S. (the unit only came with service
info. for Japan)?  Thanks a lot.

David B.
>

Hello David, (this is personal E-Mail to the posted response)

Casio DA-7, Denon DTR-100P, Teac DA-P20 are all mostly identical with the preamplifier being different only.  All these were manufactured by Casio for the others as an OEM agreement to Denon or Teac specifications.  All Transport parts and circuits are identical up to the preamplifier which is a Balanced XLR input system on the Teac model. 

The Denon should be almost completely identical to the Casio as both have Dual 1/4" unbalanced inputs. 

Just who will repair these has got to be a problem as I know Teac has for the past years virtually eliminated carrying parts for their version (batteries were available last I checked); it doesn't hurt to try getting service or parts from any of these manufacturers.

It may be time for another deck if simple cleaning doesn't solve the problem.

These decks are THE most reliable portable DAT machine ever made and I've not heard of any common problems other than needing cleaning (most any VCR repair tech can to this for you) or need of replacement batteries (which can be easily cooked if left overcharged on the charger over a few hours; run these batteries down completely 1st and charge no more that 6 hours if that long to avoid ruin). 

Running these decks on a Dual exteral battery pack using 6 D alkaline cells for the '+7v' and 6 C alkaline cells for the '-7v' supplies will give a very reliable +35 hours of recording time with plenty of low battery warning.

Check Sonic Studios Web Site for info on availability/price of the CD power system for these vintage decks.

Best Regards in Sound & Music Recording,
Leonard Lombardo, Sonic Studios(tm)..."Making Audio History With DSM(tm) Microphones"
TEL: 541-459-8839 /\ FAX: 541-459-8842 /\ USA Free: 1-877-347-6642
Informative WEB SITE:   HTTP://WWW.SONICSTUDIOS.COM
"A bit of knowledge coupled to a great deal of wisdom serves us

------------------------------------------

<< Subj:  CD battery system
Date: 98-02-17 12:29:29 EST
From: )
To: guysonic@aol.com

Guy,

I am interested in the CD battery system.  Will I be using the ac power
plug from my DA-7 with this?  I know the deck is big but I am actually
going to attempt to stealth it at some Phish concerts (just to get past
security at the gate) until I get it to the tapers section, then at that
point I don't really care about stealth. However, the bulky ac power
cord does not seem like it will helps matters.  Are you using just the
proprietary connector or will the battery pack be using the whole ac
cord?  The picture on your website just shows the battery pack so I am
curious about the specific setup. Also, what kind of work goes into this
setup to justify its $150 price tag?  I realize its about $120 cheaper
than the Eco-Charge model but the Eco-Charge has some attractive
features.

thanks,
  Brian Fitzsimmons
    >>

Hello Brian,
The CD system only uses the power cord with a disconnect from the AC wall supply so that the existing cord can be used with both. 
The CD battery system is shown on my web site listed below and comprises a dual seperate 6C & 6D Alkaline cell ruggedized battery holder system with a 3-pin molex cord connector.  Usually this system comes with a carrying case that exactly fits the battery holders.  I don't have any more of these cases in stock and the company that supplied them no longer makes this model.

Without this case, the system cost is reduced to $135 if you supply you AC adapter for conversion to this dual usage.  You would have to find a suitable way to carry these two packs around; weight is about 3.5 lbs with batteries.

Let me know it this still sounds workable for you.

Best Regards in Sound & Music Recording,
Leonard Lombardo, Sonic Studios(tm)..."Making Audio History With DSM(tm) Microphones"
---------------------------------------------------

<< Subj:  D100
Date: 98-03-13 10:21:38 EST
From: webtv.net (Eric )
To: GuySonic@aol.com

Greetings Leonard,
      I have been searching the DAT-HEADS archives trying to find a post
of yours in which you explained why it is that the D100 can take 6V DC
power without frying it.
       Do you happen to have this post on file? or do you know which
digest it was in?

Thank you,
   ERIC
  >>

Hello Eric,

It was in DAT-Heads but I  have a copy of it for you it this helps any:

Subj: Re:M1 Battery Pack #53
Date: 02/12/98
To: DAT-Heads@fedney.near.net

In a message dated 98-02-11 23:59:26 EST, you write:

<<
From: Robert Ian Hoffman <rih5@columbia.edu>
Subject: M1 Battery Pack
Date: Wed, 11 Feb 1998 00:45:54 -0500 (EST)


I was curious if anyone constructed a battery pack for the Sony M1.  The
M1 requires 2 AA batteries...am I correct in assuming that a constructed
battery pack should have 2 D cell batteries to provide the correct amount
of voltage?  Does anyone know the part number at Radio Shack for the piece
that will connect the battery holder into the M1?  Any other suggestions?
Thanks for your help.

rob
  >>

This has been discussed a few weeks ago but, you can use only 4 C or D alkaline cells for external connection and get 25 or over 50 hours of use!!.

The D100/M1 is designed to only operate well with rechargeable type NiMH AA cells and not alkaline batteries.

  For an already constructed system with DAT/Battery carrying case, see the Sonic Studios web site for pictures (very good for DIY) and specifications on available ready to go battery systems. 

Using only 2 alkaline cells of any size will not allow the deck to use all the capacity available in these cells and cut short the running time expected.  External 6 volt operation is safe for the D100/M1 decks and recommeded for best alkaline battery capacity usage.

Please remember that your Deck's battery Gage will not function entirely or properly when using these cells.... but will give you an all-of-a-sudden end of pack life indication that should give adequate warning for at least 15-45 minutes of continued running time if using C or D sized cells.

Best Regards in Sound & Music Recording,
Leonard Lombardo
------------------------------------


From: Greg @voicenet.com>
Subject: anyone have a/c adaptor for d-3
Reply-To: @voicenet.com
Date: Mon, 16 Mar 1998 17:13:37 -0500

subject says it. Anyone have a working one? Mine makes clicks on the
analog output. I've narrowed it down to the adaptor. (BTW anyone know
what sony would charge for a new one?

  >>
AC adapter powering an older D3 DAT is a lot easier than it seems.  All this deck needs is anywhere from 6-9 volts DC at 600 to 750 milliamps; this can be an unregulated 6 -7.5 volt with as much as 1 amp available.

The important detail is to wire the proper power plug polarity with the inside pin being the positive.

The D3 will turn off if the voltage drops to 5.4 volt and might be stressed with voltages above 9.5 volts.   Radio Shack or other retailers would have some adapter available in this range for $15.00 to $20.00.  The power plug could be the one on the existing Sony Adapter or a close fitting equivalent......... although read below for caution with non-Sony power plugs.

(Continued on page 14)

 

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