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ToneDeaf
Copper Member
USA
42 Posts |
 Posted - 11/24/2006 : 00:58:24
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| I am new to this forum, and was curious about something. I see in alot of places that in the ds1 the chip was changed around 94. Also I see that alot of people say the original sounded better. I was wondering if one could obtain an original chip and if it would fit and work in the new taiwanese pedal. Sorry if this has been covered already or is impossible. Thank you. |
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diggum12
Silver Member
USA
282 Posts |
Posted - 11/24/2006 : 03:12:58
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See the thread "Mitsubishi Op Amp" I started under Mods & Tech issues. I think the Mitsubishi chip sounds best. Currently it's a JRC. I believe the BA7xx was the original
All the OpAmps should be interchangeable, but I don't think that alone was the sole difference between Silver screw, Black screw MIJ & MIT. The PCB hasn't changed. I believe a few caps are different brands/styles but not different values. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 11/24/2006 : 10:30:09
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The orginal opamp was the Toshiba TA7136P. It was used up until 94-95 when it was replaced with the Rohm BA728N. This was replaced with the Mishubishi M5223L around 2000. Diggum12 has found that there's yet another opamp used in the newest version on sale today.
Don't know if the opamps are pin compatible. I've only seen the schematic for the original DS-1 so whether there's more component changes than the opamp itself I cannot tell. |
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ToneDeaf
Copper Member
USA
42 Posts |
Posted - 11/24/2006 : 18:19:08
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Thank you for the replies. I just opened mine up and the chip says - NJM2904L - JRC - G005A. Oh, and the serial number, is DU 47534. I dont know where to look up the year and what-not, but Im guessing its a 2005 because the product brouchoure that came with it was of that year. Hope this helps with the chip study. Thanks again. |
Edited by - ToneDeaf on 11/24/2006 18:24:01 |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 11/24/2006 : 18:46:50
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| That's the latest version of the DS-1. The serial number decoder is located here. It tells us that your DS-1 was made March 06, coincidently the same month as diggum12's DS-1 with a NJM2904 chip. |
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ToneDeaf
Copper Member
USA
42 Posts |
Posted - 11/24/2006 : 18:58:24
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| Thanks Bossarea, I need to pay closer attention. |
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diggum12
Silver Member
USA
282 Posts |
Posted - 11/24/2006 : 19:01:58
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Yup! Thanks for clarifying which chip was first Bossarea! I can always count on someone in this forum to correct my goof ups!
It's pretty safe to say these pedals are produced in giant batches. Just for grins I jotted down a SN for a New DS-1 today at Guitar Center. Sure enough, March 06!
Again guys, if you get one with the Mitsubishi, hold onto it. I think it sounds smoother than the older ones. That's just me ranting. |
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visserman
Platinum Member
1072 Posts |
Posted - 11/25/2006 : 18:27:42
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diggum12, do you know when this change was from the Mitsubisi to the newer chip?
Perhaps you could also post a link where you discussed this subject more into detail. Sorry have not visited the forum for a while and seems that since then new discoveries have been made.
Cheers, |
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Metallium
Bronze Member
Brazil
137 Posts |
Posted - 12/03/2006 : 14:01:32
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Hi folks! I bought on ebay a DS1, japanese model for $70.00 in very good condiction. Is this a good price?  Does it have the Toshiba chip? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/03/2006 : 14:10:32
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quote:
Originally posted by Metallium
Hi folks! I bought on ebay a DS1, japanese model for $70.00 in very good condiction. Is this a good price? Does it have the Toshiba chip?
Hi Metallium
I think you will have to open it up & read the chip number to be sure.
NEW DS-1's & SD-1's... sell for about $78 to $85 In Australia, with the 30% discount that Boss did about 3 months ago.
Regards Dr. Bob  |
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Metallium
Bronze Member
Brazil
137 Posts |
Posted - 12/03/2006 : 14:14:34
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quote:
Originally posted by Dr. Bob
quote:
Originally posted by Metallium
Hi folks! I bought on ebay a DS1, japanese model for $70.00 in very good condiction. Is this a good price? Does it have the Toshiba chip?
Hi Metallium
I think you will have to open it up & read the chip number to be sure.
NEW DS-1's & SD-1's... sell for about $78 to $85 In Australia, with the 30% discount that Boss did about 3 months ago.
Regards Dr. Bob
Hi Dr.Bob. This one is a old model, not a new model. I bought a new model too for $35.00. I think is a good price for a rare pedal, true? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/03/2006 : 14:53:34
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Hi Metallium
That's a very good price for an old DS-1
I payed $50 Australian for the one I recently bought, but only because
the guy didn't know how old it was, and the fact that, a new DS-1 is now around $80 Aust.
How about posting the Serial number of your DS-1
We can then have a better idea, as to which chip (IC) is in it.
You can date in on Bossarea's Secret Decoder.
www.bossarea.com/serial/sndecoder.aspx
Regards Dr. Bob
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Metallium
Bronze Member
Brazil
137 Posts |
Posted - 12/03/2006 : 15:14:57
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Yes I will put it here but it did not arrive yet. I just bought it yesterday!  It is coming from Japan!  |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/03/2006 : 15:34:21
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quote:
Originally posted by Metallium
Yes I will put it here but it did not arrive yet. I just bought it yesterday! It is coming from Japan!
Hi Metallium
Just Email the seller, to quote you the serial number, the guys in Japan are usually pretty good with that sort of stuff.
You will then know ahead of time.
But as Bossarea's DS-1 recent tests with a heap of (5 - I think) DS-1's, he proved that there is very little difference, between the ones, that he did his sound evaluation - experimented with.
I also know, that where are people that would disagree, with his findings between MIJ & MIT versions, of the DS-1
Maybe we are lucky, in that we only have ONE old DS-1, to go by... 
Dr Bob |
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Metallium
Bronze Member
Brazil
137 Posts |
Posted - 12/03/2006 : 15:37:09
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| Well...I hope so! I just sent an email to the seller about the serial number. I am waiting a replay. |
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visserman
Platinum Member
1072 Posts |
Posted - 12/03/2006 : 22:18:16
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quote:
Originally posted by Dr. Bob
quote:
Originally posted by Metallium
Yes I will put it here but it did not arrive yet. I just bought it yesterday! It is coming from Japan!
Hi Metallium
Just Email the seller, to quote you the serial number, the guys in Japan are usually pretty good with that sort of stuff.
You will then know ahead of time.
But as Bossarea's DS-1 recent tests with a heap of (5 - I think) DS-1's, he proved that there is very little difference, between the ones, that he did his sound evaluation - experimented with.
I also know, that where are people that would disagree, with his findings between MIJ & MIT versions, of the DS-1
Maybe we are lucky, in that we only have ONE old DS-1, to go by...
Dr Bob
Yes Dr. Bob,
Get yourself a few older DS'1 and see how they compare, in itself a funexperiment but just be careful not to overdo it |
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DS1 chip
