Search found 3 matches

by ylinjohto
Wed Sep 18, 2019 6:33 pm
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 333
Views: 266957

Re: BA BA2 BA4 BAD Dual99v Build Thread

Hi, Thank you for information!

I was wondering what is the output impedance of the unit. With JLM14 input tranfo and NE5532A op amp. Does DOA change output impedance?


Cheers
by ylinjohto
Thu Sep 05, 2019 2:23 am
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 333
Views: 266957

Re: BA BA2 BA4 BAD Dual99v Build Thread

[/quote] Check the BA is fully working with NE5532A and input reg voltage is set to +30 to +36vdc on +V of the opamp sockets. If so you should be able to remove the NE5532A and fit 6 sockets and plug in the discrete opamp. Remember the discrete opamp is only driving the +out so link on dip socket is...
by ylinjohto
Wed Sep 04, 2019 3:32 am
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 333
Views: 266957

Re: BA BA2 BA4 BAD Dual99v Build Thread

Hi! I´ve got second hand BA-4 with NE5532AP Dual Opamps. The guy had ordered Sound Skulptor SK99 op amps but they were not yet installed. Are they straight drop in or do I need to make some modifications. At least I´ve got to get some pin soccets.. Here´s some pics from the current state of the circ...

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