Search found 2 matches

by klem
Fri Sep 04, 2015 12:06 pm
Forum: Pro Audio Design
Topic: Flat Phono Preamp Based on John's P10 and 2SK389
Replies: 248
Views: 290323

Re: Flat Phono Preamp Based on John's P10 and 2SK389

+1 on JR's calcs. I noticed that the Lundahl spec sheet for that states that the primary requires one side to be grounded. I wonder why? It doesn't show to have an electrostatic shield tied internally. I think the data sheet is written as such because most situations, as I best understand it, requi...
by klem
Mon Jan 21, 2013 5:34 pm
Forum: Build
Topic: Mid Side M-S Matrix Construction Information
Replies: 112
Views: 225277

Re: Mid Side M-S Matrix Construction Information

Here's my build with two of Sir Kirkwood's M/S boards, one for M/S, and the other as line receivers/drivers. The line receivers/drivers are on the right of the pic below. The switch on the right side is a DPDT with 2.21k across each of R4+5. When engaged, it gives an 8dB boost to channels 3+4. The M...