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  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...
  15. Loud & Clear

    Soundcraftsmen A5002 X2...

    I am an extremely busy person. But here are a couple pictures I thought I would post. Note: The above amplifier boards and new .25ohm low inductance emitters resistors couldn't work, or sound better. I'm still plugging away at the capacitor banks.I will go into more detail on all of this, when I...
  16. Loud & Clear

    Hello, Do you still have your heathkit as - 1348 speakers? Thanks, Tom

    Hello, Do you still have your heathkit as - 1348 speakers? Thanks, Tom
  17. Loud & Clear

    K-horn & horn responce calculator?

    Hello, Anybody have the Klipsch K-horn numbers I need to plug into the Mcbean Horn Resp. plotter? Just need the bass horn portion. I need to run a few woofer calculations. Also if I were to stack K-horn bass bins i.e. one would be sitting on the floor, and the other on top of that bin. Would...
  18. Loud & Clear

    Soundcraftsmen A5002 X2...

    Here are a few blurry pictures. I have had a chance to work on this project a little more. I have 2 circuit gold plated molex headers coming for the ins/outs on the amplifier boards. Thanks...
  19. Loud & Clear

    Soundcraftsmen AE-2000. And were off...

    Ok, So looks like it is time for me to get this unit mounted. I was lucky enough to get a unit that was 9.5 out of 10 cosmetically, and it has the solid aluminum twist knobs instead of the plastic jobbers. I guess the only thing missing from these photos, is the 104 old "red" light emitting...
  20. Loud & Clear

    Soundcraftsmen AE-2000. And were off...

    I decided to remove the tape mon. in n out RCA's then remove the wiring, and plug the holes while installing the gold plated RCA terminals. I should have this all wrapped in my next post and ready to rack. This has been a challenging project, but it worked better than I had hoped...EDIT: the...
  21. Loud & Clear

    Sound still coming out of speakers after shutting off receiver

    P.S. Capacitors discharging....
  22. Loud & Clear

    Soundcraftsmen AE-2000. And were off...

    I jumpered the eq. in/out - eq. tape record - and tape monitor switches. I have 20 eq. potentiometers I will need to maintain, I don't need a bunch of switches that oxidize into resistors in my signal path as well... ;)I just have to remember "not" to push these buttons or it would completely...
  23. Loud & Clear

    Soundcraftsmen AE-2000. And were off...

    Ok, for those interested. I just about have this unit finished. Still need to install the gold plated rca jacks, and take care of a little house cleaning. Oh, and it sounds so damn good it otta be illegal... And yes the 3.3uf film capacitors will pass 15hz without any problem. :beerchug:
  24. Loud & Clear

    Soundcraftsmen A5002 blows fuse...

    Yes, Those red dots correspond to the 2A4 and 3A4, They are just more handy to clip your leads to, than playing around with trying to read across the emitter resistors directly. I do not have my amplifiers ready to the point of Bias Adjust. I have a lot of gear, but no distortion analyzer, and...
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