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Re: Is the new EDP more than just a software update?

The thing I'm wondering about the new plex, is can it still do the changes
that Andre was writing about a little while ago?

-----Original Message-----
From: Bret <echoplex@yahoo.com>
To: Loopers-Delight@annihilist.com <Loopers-Delight@annihilist.com>
Date: Monday, June 15, 1998 6:20 PM
Subject: Re: Is the new EDP more than just a software update?

>Kim would be the expert with this topic, but I have some experience
>with older/newer EDP so here is my $.02.
>$500 USD for a full memory EDP with footpedal sounds very good to me.
>I own an older (96) and a newer EDP (98).  I collected some
>information from Oberheim, and from Kim regarding production changes
>that have occurred on Echoplex.  As far as I can tell, you can upgrade
>an Older EDP to be functionally equivalent to the New EDP.  Several
>changes are documented on the Loopers Delight Web site, I believe
>under EDP FAQ.  Here are some more notes I got from Kim (the comments
>are his):
>>1. R21 - 330k 5% 1/4w CF.
>>2. R20 - 330k 5% 1/4w CF.
>        This is in the limiter circuit. I wouldn't bother with this,
>it won't make much difference.
>>3. R7 - 75k 5% 1/4w CF.
>        changes clipping indication on input LED, good idea to change,
>but not very important
>>4. R62 - 10k 5% 1/4w CF.
>        this is correct. allows BrotherSync to work with many more
>units than before.
>>5. R75 - 820 ohm 5% 1/4w CF.
>        correct, optimizes a delay time
>>5. C25 - R 100 ohm 5% 1/4w CF.
>>6  C26 - R 100 ohm 5% 1/4w CF.
>        This affects the limiter circuit which never worked very well.
> I would leave it alone. If you really want the digital input limiter
>working better, I have a better fix  for it. It's harder to do and
>requires tacking a resistor on the bottom. I think it's easier to just
>set the input gain so that you don't clip....
>>7. R13 - R14 - 47.5k 10% 1/4w MF
>        This widens the range of the trimpot adjustment. Don't do this
>one, since you would then have to readjust the trim pot. If you really
>want to do that, I could explain it to you.
>>8. Both Pals upgrade with new equations
>        fixes timing problem that sometimes caused weird display and
>other problems on a small number of units.
>>9. Cut Pin 5 of U12 ADC0804CN
>        important, fixes heat problem
>In checking my 96 EDP I found all the resistor upgrades were present,
>except R75, which I changed.  I had gotten PALS from Oberheim (during
>my warranty period), which I changed.  I bought the Ver 5.00 Eproms,
>and installed them.
>You can open the EDP and visually inspect the resistor locations for
>the values, and for the cut leg on the ADC.
>I would not recommend changing resistors in the EDP yourself, unless
>you feel completely competent changing through hole resistors on a
>PCBA, and know how to protect static sensitive devices.  You might
>find a GOOD technician, or ask Oberheim if they would make the needed
>changes (for $ of course).
>As is apparent from Kim's comments, some changes are more _important_
>to performance than others.  Some may be irrelevant to you (like
>brother sync).  The Firmware upgrade (EPROMS) to Ver 5.00 is a high
>priority, in my opinion.
>---eric potter <babycat@hotmail.com> wrote:
>> I'm trolling for an EDP. One option is a used one with full memory
>> foot controller for $500. Figure in $45 for new software, not a bad
>> deal, right?
>> But I'm wondering if there is more to the latest EDP bought new than
>> just the software update (which, don't get me wrong, is a fantastic
>> improvement) Were there changes to the hardware or controls, etc.
>> Am I missing out by not buying the new box?
>> thanks all,
>> -eric
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