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JL Sargent

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Posts posted by JL Sargent

  1. "the DC resistive component the motional impedance of the woofer sees thus changing damping."

    I'm trying to wrap my brain around that one. So the woofer damping is changed by it (the woofer) seeing motional impedance thats caused by DC resistance?

    Thats interesting if I understand it correctly. Changes in DC resistance will/can cause changes in speaker impedance caused by different freq. ranges of audio input? This then in affect causing changes in the quality of audio output? I continue to learn (or an attempt is made) something on here everyday lately.

  2. 1800 watts typically about max for a wall outlet (120v x15amp). I would imagine when you have alot of stuff going the voltage difference between input and output of the conditioner is different enough to cause the conditioner to "help" a little. I wouldn't worry about it. The fix would be to remove some of the load. You could divide equipment between 2 circuits while adding a second conditioner.

  3. Lakers got it handed to em again last night. They do not have an answer for Brooks who was running all over the place doin exactly what he wanted. Who'd a thunk a game 7 without Yao? Lookin a lot like Nugs/Cavs in the championship unless Kobe and the gang wakeup from their slumber back home in LA Sun night.

  4. Its an interesting discussion. It certainly seems plauseable that diaphrams harden over time and change characteristics but I have no data to support it.

    Woofers could become more sensitive for all I know.

    We didn't even touch on speaker coil reactance, as I'm guessing that could change. Don't know though.

    I wonder what the sensitivity of a 60s speaker is in 2009 vs its original spec. I would be surpised if it hadn't lost a step.

    Thanks for bouncing it around. Always enjoy your thoughts and comments.

  5. Hmmm. and I thought one of the mechanisms for a speaker sounding bad with age was a loss of sensitivity. In affect the speaker is not able to do what it once had done. Is that not a loss of sensitivity? Seems like hardening of diaphrams, weaker magnets, old capacitors in crossovers, etc. would all contribute to this condition. To ask it another way: Can a 98db 1964 Klipsch speaker still produce the same 98db in 2009 without some help along the way?

  6. He certainly has a very unique collection of skills. He continues to improve his game and now has the vision of a floor general plus great passing to go along with the shooting and driving skills he already had. League MVP this year and well deserved. Has there ever been another just like him? Not in my time, maybe not ever. He's gonna shatter a ton of records if he stays healthy. He has been compared to the great Oscar Robinson, but Oscar didn't have the unreal tool kit Lebron brings to the Gym. Only knock I have is the tattoos. Whats up with all the ink on some of those guys?

  7. Well I wondered if it would really happen and it has. Lebron is the King, literally. Seems to own the paint anytime he wants to go there. Isolated one on one against anybody and he dominates them at will. Haven't watched anybody do that since you know who. Cleveland against Nuggets I'm thinkin but Cleveland/Lakers would be a great one for the fans. I don't see anybody beating Lebron and Co.

  8. This is a 60s era Hammond E100 series tonewheel organ. Tube pre and power amps. Mono amp is about 40watts IIRC. It has this weird problem.

    Scenario 1: I turn it on and let it warm up for a minute or two and start playing. If I play bass tones loudly a wave of static/hum will move across the speakers. If I keep playing it will worsen. If I stop playing it will kinda die off on its own. A quick off/back on usually will usually correct the problem.

    Scenario 2: I turn it on and wait 15 minutes. Organ plays fine without static or hum and does so until its turned off most of the time.

    My first thought was replace the power amps rectifier? Any ideas?

  9. Its likely gonna be about XLR to RCA type connections or XLR to 1/4 connections, etc. if you go with XLR on the acives. I made up my own cables to do this but I noticed Orange County Speakers has some really good prices on these type cables. If I had it to do again I would just source the cables from those guys. For me building the cables cost just about as much as I could have just bought em for. I took an active crossover into Radioshack and laid out the connectors next to the crossover to get everything I needed to use it with my amps. Seems like it was close to $40.00 for all the connectors.

    Another consideration is balanced vs unbalanced. There have been some discussions recently on this one.

    I really enjoy an active setup. I have tubes on the upper freq.s to horns with the power of SS on the lowers to 15" woofers.

  10. I suspect the only difference between those drivers is the diaphram. Somebody send me a K55/PD5VH and I'll take em apart side by side with photos. I guess thats the only way we will really know. Those castings certainly look the same.

    If somebody can point me to a picture of the open halves of a PD5VH I would appreciate it and then I could at least compare.

  11. Got those two 20uf caps installed. All working well. Tested each pin #2 and had nice low voltages (IE: .02 .01 etc) except one which was at 1.2v This was adjacent to the worst looking coupling cap in the amp. Its really sweatin there so I'm suspecting its kaput. Getting my list together for ordering and one of the smallest caps has no value on it, just a number 475. Anyway, I thought I would just measure capacitance and go with that value?

    I moved the slightly brighter tube to another socket and the brightness moved with the tube so that one may be a short timer.

    When I get all the new caps installed I will post a picture. Thanks again.

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