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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: pnobles on January 07, 2004, 05:20:38 PM

Title: DIY: warm mod Ua-5
Post by: pnobles on January 07, 2004, 05:20:38 PM

anyone have the schmatic for this ?

thanks

Title: Re:DIY: warm mod Ua-5
Post by: Chuck on January 07, 2004, 05:22:23 PM

I don't think you'll be able to find this.

Title: Re:DIY: warm mod Ua-5
Post by: pnobles on January 07, 2004, 05:23:08 PM

thanks...

Title: Re:DIY: warm mod Ua-5
Post by: Kevin McF on January 07, 2004, 05:23:30 PM

i don;t think i would trust myself even with the plans to do it myself...

i would rather no risk wrecking the UA-5 and pay oade to do it

kev

Title: Re:DIY: warm mod Ua-5
Post by: Brian Skalinder on January 07, 2004, 05:42:46 PM

Try and Advance Search and you should be able to find:

[1] a link to a guy who photo'd the insides of a UA5 in excruciating detail
[2] a post from Todd about which op amps may be used as replacements to achieve a more Grace-like or Apogee-like sound, per a casual posting by Doug Oade

Don't know of any actual schematics, though.

Not sure exactly where they are, but give it a go.  If you don't find 'em, lemme know and I'll see if I can dig 'em up.  

Title: Re:DIY: warm mod Ua-5
Post by: BCostigan on January 07, 2004, 05:48:58 PM

The most crucial info we need is exactly which op amps and caps are changed.  It appears that there are many in the circuit but it also appears that there are just a couple large caps.  Anyone that knows this stuff could guess better than me I'm sure!!   As for the op amps I think there are only 3 if memory is correct....just change em all.  

It's not changing the parts that's tough....it's knowing exactly WHICH ones to change that is crucial! :P

Title: Re:DIY: warm mod Ua-5
Post by: pnobles on January 07, 2004, 07:11:40 PM

i've had a few years of electronics study, i think i can do it, granted i'm properly instructed....

Title: Re:DIY: warm mod Ua-5
Post by: Sean Gallemore on January 08, 2004, 12:54:06 AM

http://www.taperssection.com/yabbse/index.php?board=1;action=display;threadid=8972;start=0

all the shit is in this thread somewhere
\
someone asks this atleast once a month so I have the page saved :-D

Title: Re:DIY: warm mod Ua-5
Post by: pnobles on January 08, 2004, 11:46:21 AM

danka.

Title: Re:DIY: warm mod Ua-5
Post by: save on January 09, 2004, 12:07:28 AM

have u tried asking doug?  if i remember right he was pretty cool about giving out this type of info. in the past?  maybe i'm wrong but i swear i remember reading a post in the past @ oades where he has given out similar info. when people asked...it's worth a shot.

Title: Re:DIY: warm mod Ua-5
Post by: Chuck on January 09, 2004, 10:04:23 AM

Quote from: stoopidstp on January 09, 2004, 12:07:28 AM

have u tried asking doug?  if i remember right he was pretty cool about giving out this type of info. in the past?  maybe i'm wrong but i swear i remember reading a post in the past @ oades where he has given out similar info. when people asked...it's worth a shot.

If this happens, please let us know.

Title: Re:DIY: warm mod Ua-5
Post by: BobW on January 10, 2004, 08:44:17 AM

I'm aiming for presence for my UA-5 and Oktavas, but I'd be happy to kick some idesa and resources around. See this thread as well:
http://www.taperssection.com/yabbse/index.php?board=4;action=display;threadid=9924