#10
#
11
said the board might be loaded with 5532s but I couldn't find them. All I found were JRC 4558D which are one of the
most common type of opamps I think. There are some myths about that chip especially in Ibanez Tube Screamer
pedals (The original 808 had that chip and a lot of people mod their modern TS-9 pedals to use that chip along with
different resistors in the output section).
Quote:
Originally Posted by sweetbeats
Hey, Tim, have fun okay? Take it from me...eventually the fun of the refurbs gets cold...not that it can't warm
up again but I took too many refurb projects on at once and it spoils things.
You're doing a really nice job tho'.
Coming from you that means a lot! Thank you! I'm trying to keep the balance. It's not easy, especially when you're
inbetween jobs and have a month of spare time... Poor me
Cheers
Tim
__________________
http://tubegeek.de
03-01-2010
timkroeger
Custom Title User
Join Date: Feb 2010
Location: Germany
Age: 32
Posts: 152
Rep Power: 643608
I finally got around to measure the voltages of the PS-3500.
nominal | measured
==================
+15,00V | +14,96V
-15,00V | -14,99V
+12,00V | +11,87V
+08,00V | +08,04V
+48,00V | +47,89V
I couldn’t notice any 50Hz ripple as there was too much HF (in the range of about 20mV) from my computer and
possibly other stuff around that triggered the x-pos. I had removed the cover of the PSU’s housing so maybe it just
wasn’t shielded enough. Maybe I should consider buying one of those so called power conditioners. Would that take
care of the HF?
__________________
http://tubegeek.de
03-01-2010
miroslav
Cosmic Cowboy
Join Date: Jul 2009
Posts: 2,421
Rep Power: 5500053
Tim
I take it you have a schematic...or are you working "blind".
I see you took off the top panel from the 4-channel modules...I didn't go that far. I just flipped them, and then, using
a small, long art brush, I would dab some deoxidizing solution on the back of each pot, working into whatever crack
there was. The long brush allowed me to get in-between the PCBs without having to take apart the 4-channel
modules....but then, your board was certainly in need of more "aggressive" cleaning!
I guess I would have done it too if mine needed it.
Oh...as an aside for all the 3500 users, I also have the LA-3500 balancing conversion kit...though I've never gotten
around to installing it.
I obtained it a few years ago on eBay...mainly 'cuz I know they are harder to find than hen's teeth (got it for about
$100 only!!!)...
..but I've been running my board without it for so long, just didn't see the need to convert it to a full balanced setup.
If I did, I would then have to rewire a good deal of my patchbays...and make some other changes...etc...so I've let it
go.
If I ever land a 24-track 2" that's full-balanced...then I will probably make the switch.
Yeah...like sweetbeats said...TASCAM (up until a couple of years ago) was still most stocking parts for the 3500
boards...so check with them before you get something generic.
I found you can get the Alps Faders from Mouser Electronics...but they ain't any cheaper than what TASCAM charges.
Since you are in Germany...you can also try:
http://www.newark.com/
They are here, but pull from their European sources, and they too carry Alps faders last time I checked...a bit cheaper
too!
Oh...here's the link to the guy who went nuts on his 3500 with upgrades:
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern