Support for JLM Audio Kits
Moderator: Joe Malone
Joe Malone
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Posts: 2190Joined: Wed Jan 24, 2007 11:35 pmLocation: Brisbane, Australia
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by Joe Malone Mon Oct 29, 2012 11:05 pm
BA-71A Schematic.
JLM Modified BA-71A Schematic. Moving R17 out of the -30v power feed and replacing with a link now makes this the 0v ground common.
Adding the R17 in series with the +30v rail makes this a positive powered module. Allowing it to be powered easily by our Power Plant kit or 48v SMPS + TREX kit.
Both Power Plant kit or 48v SMPS + TREX kit options will give +30v to run the module and +48v for phantom power.
JLM Modified BA-71A Schematic highlighted.
Joe
JLM Audio
Capturing Audio without Injury
studiomollan
Posts: 21Joined: Mon Jan 21, 2013 9:11 pm
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by studiomollan Thu Feb 20, 2025 1:59 am
HI!
Joe Malone
Site Admin
Posts: 2190Joined: Wed Jan 24, 2007 11:35 pmLocation: Brisbane, Australia
Contact:
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by Joe Malone Tue Mar 25, 2025 1:15 pm
studiomollan wrote: ↑ Thu Feb 20, 2025 1:59 am
HI!
Would it be possible to modify the schematic to be able to run it from a bipolar +/-16V supply?
/
Emil
Yes with a bit reworking it can work great. See below
JLM BA71A.jpg
JLM BA71A rack.jpg
JLM BA71A rack inside.jpg
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Joe
JLM Audio
Capturing Audio without Injury
studiomollan
Posts: 21Joined: Mon Jan 21, 2013 9:11 pm
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by studiomollan Mon Mar 31, 2025 7:15 am
Wow!
Is this something you are planning on selling?
I guess help with the conversion is out of the question then..
/
Emil
