It lives!!!

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JoshK

It lives!!!
« on: 2 Nov 2005, 12:34 am »
Got the UcD battery powered amp up and running tonight.  Caps are brand spanking new and I haven't done too much critical eval but the bass is pretty kick butt.  Occam was right, battery power has fantastic bass.

Occam

It lives!!!
« Reply #1 on: 2 Nov 2005, 01:35 am »
Congrats Josh!
So you and Gordy now have the worlds heaviest portable 'boomboxes'. Add some ressonant plastic enclosed speakers, hoist them on your shoulders and boogie down the street  :lol:
So how much does the stereo amp and ps weigh in total?

JoshK

It lives!!!
« Reply #2 on: 2 Nov 2005, 01:40 am »
Quote from: Occam
Congrats Josh!
So you and Gordy now have the worlds heaviest portable 'boomboxes'. Add some ressonant plastic enclosed speakers, hoist them on your shoulders and boogie down the street  :lol:
So how much does the stereo amp and ps weigh in total?


Amp = not much
PS = brick sh*thouse!

Now I just gotta figure out how to plug the connectors in with the battery charge without flipping the output circuit protection (when the caps pull hard on start).  Could do a soft start, but I think a hold down resistor solution might be more clever (not my cleverness, saw it done on diyaudio).

P.S. the bass could also be a product of the Elna's as my AC powered UcD's don't have Elnas.  :scratch:

Gordy

Congratulations!!!
« Reply #3 on: 2 Nov 2005, 12:41 pm »
Excellent Josh!  So you now have both amps up now?  I'm keen to hear your impressions of the battery vs. rectified powered modules.  Have you installed the Sonicaps/outputs yet?  Rumor has it you replaced the input caps...


Quote from: JoshK


Now I just gotta figure out how to plug the connectors in with the battery charge without flipping the output circuit protection...


You'll be able to charge on the fly?

Quote from: JoshK

P.S. the bass could also be a product of the Elna's as my AC powered UcD's don't have Elnas.  :scratch:


Only if the bass control is a product of the Nichi KZ's (black) as well  :D .  I took some snap shots of my progress with one of the Version IV's as of last night (pg. 3 in my gallery), just need to make up two molex connectors for the inputs and I'm there :mrgreen:

SteveACNJ, who pointed out the smaller Gen. II Sonicaps to me) should be coming on line with his AC/rectified UcD's real soon as well!

JoshK

It lives!!!
« Reply #4 on: 2 Nov 2005, 02:23 pm »
Hi Gordy,

I haven't yet altered any of the modules themselves.  I have a few projects to finish up before I start altering the modules.  It isn't that it will take long it is just that I have zero time.   :roll:

Yes I do have both the battery powered UcDs and the AC rectified ones running but the AC amp needs some more work to rid of RF hash.  My house is an RF magnet.  I can't use any unshielded cables at all.  

The battery modules I have running are using Elnas Cerafines followed by Nichicon KG followed by some Jantzen bypasses.  I also want to try out a snubber as the hotrod thread at diyaudio seems to give lots of props to the solution.  I'd also like to experiment with a choke input supply.   But first things first.

About the charging, currently I manually plug the battery packs in when I want them to charge and unplug them when I want to run off the batteries. The problem is when I move the amp and unplug the tether between the amp and the packs.  When I plug the tether back in when the packs are fully charged, I get a small pop and the output protection on the packs clicks over and I have to plug them back in to reset.  I can only imagine that the caps in the amp pull too much too fast.

Gordy

It lives!!!
« Reply #5 on: 2 Nov 2005, 04:19 pm »
Are you sure it's a protection mode and not the AC power interrupt / battery power only mode?  Red light comes on to warn of power outage?  That would be normal if the batteries are drawing power and the charger is unplugged.  Sorry if I'm misunderstanding...  just ate way too much breakfast :D  :lol: