| Author |
 Topic  |
|
boss freak
Gold Member
USA
663 Posts |
 Posted - 09/13/2005 : 11:00:09
|
| From what I remember, mine are much lower serial numbers. I think one is 09xxxx and the other is 1xxxxx. My memory isn't what it used to be though and I'll have to open them up tomorrow to confirm. |
 |
|
|
dm-2
Bronze Member
Ireland
81 Posts |
Posted - 09/13/2005 : 14:57:39
|
| It seems then that the DM-2 was available in silver screw at the very beginning and i'm guessing that when the silver screws ran out, they still had "use a coin" back-plates which they used on pedals like mine, with black screws. That's some find boss freak! |
|
|
|
bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 09/13/2005 : 18:21:33
|
| I had a look at a few of my pedals and both my TW-1 and CE-2 have "the coin" bottom plate and black screws so this was probably normal for a period. Both of these pedals have "Made in Japan" on a black sticker attached to the label. |
|
|
|
Steve Simmonds
Copper Member
United Kingdom
7 Posts |
Posted - 09/13/2005 : 18:57:50
|
Hi
With reference to my funny DM-2 with the turquoise blue label, I notice that this website says that the DM-2 was produced with two labels, black and green. Has anyone ever seen this green label version?
Just a thought, but maybe someone made a small error (or was blue/green colour blind).
Also, has anyone ever seen the ET5214-510B PCB before?
P.S. If anyone has a spare set of the correct knobs for my Dm-2 from any old BOSS pedal......... ;-)
Steve |
|
|
|
bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 09/13/2005 : 20:01:27
|
| You may be right. Many of the labels are based on observations from Ebay pictures and blue can easily turn to green in those ads. Normally I wait until I see 2 similar pedals before I write up the new label information. Can't remember where this came from though. |
|
|
|
Steve Simmonds
Copper Member
United Kingdom
7 Posts |
Posted - 09/13/2005 : 22:28:26
|
Just a bit more info.
By using the date code on the chips and finding the most recent date code, you can work out the earliest possible date that the pedal was made.
There is no serial number in my DM-2 (just a bit of white paper remaining where it used to be  ), but one of the chips has a date code/batch number of K8327 - this means 1983 week 27. So my pedal must have been made well after mid 1983.
cheers
Steve |
|
|
|
bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 09/13/2005 : 22:58:14
|
I had no idea that the ICs had date codes 
I've opened up my DM-2 again (for the 3rd time this week. The compander NE570N has the number 8233 printed on it. That's about September -82. Wow!!! |
|
|
|
dm-2
Bronze Member
Ireland
81 Posts |
Posted - 09/14/2005 : 02:09:15
|
| Wow indeed! Mine is 8120 so I guess it was made shortly after May 1981. So we've finally come across a method to date our pedals, thanks for that Steve, really appreciate it. Maybe this is the "trade secret" they talk about in the Boss Book! |
|
|
|
Goran
Double Platinum Member
Sweden
2203 Posts |
Posted - 09/14/2005 : 07:02:51
|
This could really be the method, we have to check it as close as possible, compare to other known data.
Are all IC�s (in all pedals) marked this way is another thing we have to check.
Amazing if it�s the solution of one of the reasons this forum started, isn�t it so bossarea?
This could also mean that we can more closely date any event on the outside of the pedals (label-shifts, silver/plastic screw etc etc).
We should have thought about this earlier i suppose as I�ve read about it somewhwere, regarding dating chips in TS808, if I�m not remembering wrong. |
Edited by - Goran on 09/14/2005 07:08:14 |
|
|
|
boss freak
Gold Member
USA
663 Posts |
Posted - 09/14/2005 : 09:23:42
|
Yes, I've read it in regards to the TS808 also. I could never remember how to read them though and then I sort of forgot about it again. It's doubtful that I will have time to open all of my pedals (again) and note the date codes, but maybe I will some day. |
|
|
|
Goran
Double Platinum Member
Sweden
2203 Posts |
Posted - 09/14/2005 : 09:46:52
|
If all of us opened up our old pedals there�s gonna be a lot of information, but someone has to compile all this information too.
A big job...
Ther e should be some form to use for that, where we all fill in our data. I don�t know if this is possible. |
|
|
|
bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 09/14/2005 : 11:40:21
|
| I think the date codes are only printed by some manufacturers. Of the 4 ICs in the DM-2, only one had this code printed on it. From some web searching it looks like the NE570N is a Philips component. I don't know if other manufacturers are using this code too. |
|
|
|
boss freak
Gold Member
USA
663 Posts |
Posted - 09/14/2005 : 12:59:25
|
You could be right about other manufacturers not using date-coding. I wouldn't be surprised if there are only a few that used that method now that we've figured out how it works!  |
|
|
|
Steve Simmonds
Copper Member
United Kingdom
7 Posts |
Posted - 09/14/2005 : 19:36:29
|
Hi
No, the date code of this sort (YYWW or WWYY) is very common (although sometimes it is written on the underside of a chip). I have been an electronics engineer for about 30 yrs. Manufacturers usually write batch numbers on their chips (were space allows) and it is very common to use year and week numbers.
cheers
Steve |
|
|
|
bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 09/14/2005 : 20:50:42
|
Thanks for sharing this information with us Steve.
I had a look through my misc parts box and found this to be correct. Most integrated circuits has something more than their model number printed on them. Some on the top, some underneath, about 50% had the yyww printed. |
|
|
|
Topic |
|
DM-2, different chips?
