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In Reply to: RE: You guys were right !.. it needs a bias resistor ..... posted by drummerwill on January 19, 2015 at 12:30:42
is by using a signal generator and a scope, that is what I am learning now.
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for most of my build I've relied on music input and speaker output.
Thank you for your suggestion!
Willie
Willie:
Get it as good as you can musically. Your 100K is still too much load. When it's as good as you can get it, apply the signal generator and dual-trace 'scope.Watch your thinking! You want signal replication, but NOT at the expense of any dynamics, speed, or transparency. You WANT IT ALL.
Keep going back and forth. After noting the test instruments, make necessary corrections and go right back to listening, then-- after a few weeks or so-- back to the tests, etc.
When you think it's good, call-in your NON-audiophile friends and throw a Party. They will tell you if it's good or not.
The audiophiles can come in and grasp at it after it's perfected. Until then, let them pontificate with their own stuff.
Here's a little story to encourage you-- and other good guys here: A while back, I attended VSAC in Washington State. There were only 35 or 36 exhibitors there.
It was mainly a DIY affair, but was open to us semi-commercial guys as well.
There were all kinds of DIY people present, and a contest downstairs to see who could build a SPUD amp in a day, or so-- or was it hours? Don't remember. The DIY guys did it, and it sounded OK to me. They're pretty talented!
I had my usual demo going on with the big GPA 604's in a terrible room with a huge ceiling vault, and really bad echo/acoustics. So, I dutifully placed the two speakers very close together-- in a huge room, no less, and killed all the bass I could because the room was just too big and echoey to control. No hope for my time and budget!
So, we just set it up so we liked the music-- to "H" with the @@#$%^ room!
I knew this was no show-winner, but we were having fun anyhow. I just let it play and cruised around the other places, enjoying the DIY stuff, and all the cool LP's one could purchase.
I got back, and the Hotel crew (that was on a break) was in my demo room. They had been to all the other rooms, and liked this one-- said it sounded "real" to them-- the others didn't. They loved it, and over the next few days, the whole Hotel crew was spending every off-moment in our demo room.
The DIY people and Audiophiles didn't care too much-- they said good amps, bad demo, etc. They were Nit-Picking, the normal people were enjoying music despite the room.
If you're developing equipment to listen to, you have to decide what is real.
---Dennis---
Edits: 01/20/15
Thats when you know you are on to something
Thanks, George-- good Banjos. reminds me of Southern California. I like it!
Speaking of S. Cal., you might like these CD's-- Chris Hillman and Herb Pedersen at Edward's Barn (Rounder
11661-0652-2), and Chris & Herb-- "Bakersfield Bound".
---Dennis---
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