Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 26

Thread: Maybe need a different power supply...

  1. #1
    Join Date
    Apr 2008
    Location
    Pacific Northwest, USA
    Posts
    8,553
    Thanks
    223
    Thanked 218 Times in 198 Posts
    Rep Power
    3753124

    Maybe need a different power supply...

    Sign in to disable this ad
    Hey, folks...

    So I’ve been doing a lot of work on my Tascam prototype console, the “M-__” the past few weeks...lotsa different stuff I’ve got in the cooker right now. But one of the major facets is continued power supply testing and modification. It’s looking like I may need to do something different than continue to modify the PS-520 power supply I’ve been using from an M-520...I think I’m about to the limit of the +/-15V supply. You all know I’m into the aesthetics...I like the fact the PS-520 supply is from a model derived from my prototype...keeps things in the family line...but I really need a supply with +/-15V rail’s rated to 3A and I think the PS-520 is starting to approach limits around 2A...that’s plenty for the M-520, but not for the M-__. Does anybody have a Tascam console supply for sale from a larger console than the M-520 (like M-3500/M-3700), or does anybody have ideas for good rack-mount solutions? Ultimately I need something with +/-15V (3A or better), +6V, +48V, and +/-35V (1A or better). I know that last set of rails will not be turn-key...I’ll have to modify an existing multi-rail supply...

    The Acopian stuff looks interesting but I’m overwhelmed by all the models of modules and how they mount. Power One modules are a possibility but same issue with mounting.

    Thoughts?

  2. #2
    Join Date
    Jul 2009
    Location
    Trending
    Posts
    18,740
    Thanks
    303
    Thanked 874 Times in 763 Posts
    Rep Power
    21470743
    I have two M3500 Power Supplies.
    I bought the second one several years back when I spotted it on eBay...thought it would be smart to have a backup for the M3500.
    Of course now...I have the M3500, the PS units, and all kinds of extra parts...and I'm trying to unload it all since getting the Trident.

    That spare PS I recall only powering up once, with the console connected to it to see if it worked, and then I went back to using my original one. I seem to think that the spare may have actually been rebuilt/recapped (???) because I opened it up to check it out inside...but don't hold me to that.

    So...you need/want it...?...it's yours.
    I can part with one PS and still have one for the console, in case I can find someone who wants to buy the damn thing.

    PM me your shipping address.
    I'll get it boxed up over the weekend and FedEx it to you on Tuesday.

    AFA the Acopian stuff...yeah, I was also overwhelmed by all their models and how one goes about getting the right thing.
    Thankfully...the 4 Acopian power supplies that came with the Trident where all sussed out by the previous owner's technician...and he knew what he was doing with the whole power distribution upgrade he did on the console...so I didn't have to try and figure out which ones would be the right ones to buy, and how best to integrate them.

  3. The Following User Says Thank You to miroslav For This Useful Post:


  4. #3
    Join Date
    Apr 2008
    Location
    Pacific Northwest, USA
    Posts
    8,553
    Thanks
    223
    Thanked 218 Times in 198 Posts
    Rep Power
    3753124
    Oh no way...for real??



    Before you do that awesomeness let me verify the transformer is up to the task...I’m pretty sure it is. Just had time for a peek at the schematics but so far the input channels alone on an M-3500-32 have a maximum theoretical power supply demand of 1.44A...five NJM4580 dual opamps between the Input A and Input B PCBs...so that’s a really good start.

    There’s no +6V supply but there IS a +8V supply and I believe it uses a 7808 regulator and I could just swap in a 7806 and be on my way there...

    This has potential...

    The power supply umbilical to the console uses a DSUB connector?

    Huge thanks for the offer, Miro!!!

  5. #4
    Join Date
    Jul 2009
    Location
    Trending
    Posts
    18,740
    Thanks
    303
    Thanked 874 Times in 763 Posts
    Rep Power
    21470743
    Quote Originally Posted by sweetbeats View Post

    The power supply umbilical to the console uses a DSUB connector?

    Huge thanks for the offer, Miro!!!


    Not my PS pictures...but this is the type of connector:







    Let me know if it will work for you....so I can find a box for it.
    No...I don't have a second/spare umbilical, just the one that came with the console...sorry.

  6. The Following User Says Thank You to miroslav For This Useful Post:


  7. #5
    Join Date
    Apr 2008
    Location
    Pacific Northwest, USA
    Posts
    8,553
    Thanks
    223
    Thanked 218 Times in 198 Posts
    Rep Power
    3753124
    Daaaaaang on the umbilical though that would be too good to be true. That’s a Hirose connector...Sumicon 1600 series...same as they used on the M-520 supply...and on all the interconnects on a number of their tape machines like the 85-16, MS-16, ATR-60 series...I’ve got extra parts for the PS-520 but that’s a 20-pin connector and the PS-3500 uses a 28-pin connector. The Hirose stuff is unobtanium for years now.

    Begin the search, I will.

    444808e9-50ff-4750-b749-dfdc49230c6b-jpeg

    P.S. still need to finish guesstimating the load capability of the +/-15V supply in there.

  8. #6
    Join Date
    Jul 2009
    Location
    Trending
    Posts
    18,740
    Thanks
    303
    Thanked 874 Times in 763 Posts
    Rep Power
    21470743
    Yeah...I know these connectors have been MIA for years now.

    It might be possible to replace it with something more common...but probably a good bit of work, first finding something that would fit in the same general slot, and then a way to get it attached to the unit.
    Probably the simplest solution would be to remove the original, splice in a pigtail, and then just attach to the pigtail a more common plug, one that would marry-up with your board....let it just hang, rather than trying to hard-mount it to the PS.

    Just let me know if you want it.

  9. The Following User Says Thank You to miroslav For This Useful Post:


  10. #7
    Join Date
    Apr 2008
    Location
    Pacific Northwest, USA
    Posts
    8,553
    Thanks
    223
    Thanked 218 Times in 198 Posts
    Rep Power
    3753124
    PM sent, Miro.

    Unbelievable.

    I really appreciate this.

  11. #8
    Join Date
    Jul 2009
    Location
    Trending
    Posts
    18,740
    Thanks
    303
    Thanked 874 Times in 763 Posts
    Rep Power
    21470743
    PM sent back.

    It's yours man...you're welcome to it.
    Put it to some use.

  12. #9
    Join Date
    Feb 2009
    Location
    northampton uk home of Dr Who and Blackstar Amps!
    Posts
    10,016
    Thanks
    1
    Thanked 672 Times in 636 Posts
    Rep Power
    9374895
    Could you get away with 25 pins on the ubiquitous and cheap as chips D-Sub connector? The contact rating is 5amps.

    There is apparently a 37 pin DS but not common out of hospitals!

    Dave.

  13. #10
    Join Date
    Apr 2008
    Location
    Pacific Northwest, USA
    Posts
    8,553
    Thanks
    223
    Thanked 218 Times in 198 Posts
    Rep Power
    3753124
    My BR-20T uses a 37-pin DSUB for the remote/sync interconnext.

    Yeah, could probably make DSUB work, but I’m holding out to see if I can get a rectangular mil-spec Winchester connector to work...have spares here from Ampex stuff and would far exceed the Hirose or a DSUB connector.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 3
    Last Post: 12-21-2012, 13:14
  2. 48v phantom power from 12v power supply!?
    By fretless in forum Microphones
    Replies: 20
    Last Post: 10-16-2012, 21:30
  3. Replies: 5
    Last Post: 11-17-2011, 10:15
  4. SP T3 power supply + phantom power = kaloooey!?
    By spiral in forum Microphones
    Replies: 13
    Last Post: 03-26-2002, 21:12
  5. x-26 power supply
    By cjschoon in forum Fostex Forum
    Replies: 0
    Last Post: 04-12-2001, 09:55

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •