January 6, 20206 yr Author I'd like to start planning my preamp using these boards. Does anyone see a problem with using AMB's LCDuino-1 and delta 1 and 2 setup for balanced?
May 9, 20215 yr Author ok, now that I have my locky_z curve tracer working I need to figure out what template to load in the tracer to match the BC556 (PNP) and BC546 (NPN) and what settings to use. I'm kind of lost in that area and I've never used anything precise like this to match. I'm pretty sure the unbal/bal boards run at 20Vdc so I'm guessing I want to match for that voltage but other than that? Here's the templates available and a screenchot of the settings for one of the PNP templates
September 11, 2025Sep 11 Bumping up the thread, having some difficulties to grasp how this bal/un is working... Shall I use it to get the unbal output of my DAC as an input, to go balanced to my KGSSHV? Referring to v5, the last version... I guess the diamond buffer is included in the schematic and board, but really can't understand what would be input and output in my particular case... Some kind words of encouragement? Thanks...
September 11, 2025Sep 11 generally that is how these are used unbalanced out to balanced in. Take a look at this post which should tell you everything you need to know. It usually helps to read the entire thread when possible.
September 12, 2025Sep 12 14 hours ago, Pars said: generally that is how these are used unbalanced out to balanced in. Take a look at this post which should tell you everything you need to know. It usually helps to read the entire thread when possible. Thank you Pars, I had a read of the thread, so, seems that the balanced/unbalanced board per se ends with the file diffinput3.zip; following ones, 5, 5a and 6 present only the diamond buffer though. Since in the drive repository I couldn't find the file I really need, http://gilmore.chem.northwestern.edu/boards/diffinput3smtd.zip I'm asking here, in case someone could supply it. Another point that I couldn't clarify through reading, is buffer needed only when interconnect cables are very long? Or could I use directly the unbal/Bal between DAC and amp? Thanks, Mike
September 12, 2025Sep 12 Here are the links to Kevin's files for PCBs and schematics etc. i think that for your application you would be fine without the buffer.
September 12, 2025Sep 12 4 minutes ago, Pars said: Here are the links to Kevin's files for PCBs and schematics etc. i think that for your application you would be fine without the buffer. Yes, I've exactly these two addresses, but the smd board is not included in there.
September 12, 2025Sep 12 Yes, that one isn't there. There are some balanced input boards up there but not sure what those are exactly. There was a GB back in 2017 for a bunch of stuff that the diffinput3smtd board was mentioned in, but not sure if those were actually included in the GB or not. Pinging @kevin gilmore @sbelyo ran that GB and might also have the file.
November 10, 2025Nov 10 Author On 9/12/2025 at 1:47 PM, Pars said: Yes, that one isn't there. There are some balanced input boards up there but not sure what those are exactly. There was a GB back in 2017 for a bunch of stuff that the diffinput3smtd board was mentioned in, but not sure if those were actually included in the GB or not. Pinging @kevin gilmore @sbelyo ran that GB and might also have the file. I'll have to look. I might have some boards laying around if that helps
November 10, 2025Nov 10 1 hour ago, sbelyo said: I'll have to look. I might have some boards laying around if that helps Thanks, I've already built them, Dr. sent me the file.
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