Recent content by Loud & Clear

  1. Loud & Clear

    Soundcraftsmen A5002 X2...

    A few more pictures. Amplifier metering is switchable between bar/dot/off modes via the "re-purposed" speaker switching on the front of the units.. .
  2. Loud & Clear

    Soundcraftsmen A5002 X2...

    Wups I forgot to post the finished product. Here they are in action. The subsonics are clean right down to below 20 cycles. Turned out better than I had anticipated. If you are looking for a whole album completely full of subsonics, give Pink Floyd "a momentary lapse of reason" a try and see how...
  3. Loud & Clear

    What Does an Underbiased Amp Sound Like?

    When in doubt, run class ab's a little hot, just a little.
  4. Loud & Clear

    Soundcraftsmen A5002 X2...

    Amplifier 2 is well on it's way. .
  5. Loud & Clear

    Soundcraftsmen A5002 X2...

    Please ignore the post above. I was trying to fix up the format and can't seem to find the "delete" option. I know this is probably the wrong place for this type post, But, I am in need of 1 soundcraftsmen amplifier speaker switch. One of my switches is broken. Most of the S.C. amplifiers with...
  6. Loud & Clear

    Soundcraftsmen A5002 X2...

    Thank you for the compliment. We all have out "nitches" in which we excel. Indeed, headroom is everything. Especially for the subsonics enthusiast such as myself...
  7. Loud & Clear

    Soundcraftsmen A5002 X2...

    Ok, I just got around to examining, and subsequently fixing the problem with my rail switching indicators. With using the high intensity blue l.e.d.'s with a 14K resistors in series, I found through examination that the 47uf (C23) capacitor was to large. It made the l.e.d.'s sluggish coming on...
  8. Loud & Clear

    Soundcraftsmen A5002 X2...

    Thank you just dave. I'm spread pretty thin, but I am exited to get it accomplished and give it a listen. "Thoughts Become Things"... :)
  9. Loud & Clear

    Soundcraftsmen A5002 X2...

    Here are a few pictures of one amplifier being put through it's paces. These are just a few quick snapshot taken quickly. I've yet to illuminate the clip indicators. The amplifier is just to powerful and I worry about the speaker, even though the are made to handle the "theoretical" power from...
  10. Loud & Clear

    Soundcraftsmen A5002 X2...

    Thank you very much MarZutra. Ok, Thanks. I'm getting a fast attack slow decay on rail switching indicators. I can see I have to make a few changes. Very hard these days to find "standard" l.e.d.'s everything is way to bright now a days. Not every application takes an l.e.d. with 7000mcd...
  11. Loud & Clear

    Soundcraftsmen A5002 X2...

    I actually have one of these amplifiers done. I didn't want to post pictures till I have them both done. The sound and dynamic range are out of this world. Never heard anything like it. More about that later. Right now I have a question for Soundcraftsmen H class owners. Goat67, you out...
  12. Loud & Clear

    Soundcraftsmen A5002 X2...

    Finally back at this again. Generally, it is the wait for parts the is taking the most time... I found I could not do the dual mono conversion. Well, I could, but would have to eliminate the protect circuitry. So I am going just going to make them high performance stereo amplifiers. The...
  13. Loud & Clear

    Matching hFE for Differential Pair

    True this. For differential pairs, Vbe (beta) is a better reference. And for drivers, finals, etc... hfe is a better reference...
  14. Loud & Clear

    Soundcraftsmen A5002 X2...

    Well, I gave into temptation. I have started disassembling my amplifiers. I have begun to add emitter resistors and transistor sockets. Therefore adding 4 extra output transistors per amplifier 2 per channel... I know 4 per board is better than 3, makes em' more rugged indeed... ;) Center...
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