No love for the original Phase Linear gear?
- Thread starter PureQuill
- Start date
ferninando
Lunatic Member
only PL love I have is for the phase linear 1000 auto correlator noise reduction unit.
ChopperChas
Super Member
Is the DC protection necessary for the Series Two 700? I thought the flame problems were only with the earlier stuff, not the series two.
Charles.
Charles.
ChopperChas
Super Member
Even if the relay is in the on position when it fails?
I don't think any of my gear has a relay. I know the qx4000 doesn't, it has a muting circuit but no relay. (And that circuit just limits voltage to the power transistors). My tube gear doesn't. Not sure about my Sony receiver, but it's not hooked to anything I care about.
Is it really that big a deal? My uncle has used this since 80 or 81 without any problems.
Charles.
I don't think any of my gear has a relay. I know the qx4000 doesn't, it has a muting circuit but no relay. (And that circuit just limits voltage to the power transistors). My tube gear doesn't. Not sure about my Sony receiver, but it's not hooked to anything I care about.
Is it really that big a deal? My uncle has used this since 80 or 81 without any problems.
Charles.
I have an output relay board for the 700. It bolts on to the existing speaker jacks. No drilling.
700b output relay)
A relay probably will not protect an amp, but it will go a long way to protecting the speakers. It assumes the amp has failed when it triggers. The relay is considered sacrificial if it protects the speakers. The contacts will probably weld when they open.
I designed my relay circuits with a normally open and a normally closed contact. When it triggers one contact opens to disconnect the speaker. The other contact shorts across the speaker to make sure that it doesn't see any DC. Most designs don't do this as it adds cost to the design. I don't think it's an option.
I designed my relay circuits with a normally open and a normally closed contact. When it triggers one contact opens to disconnect the speaker. The other contact shorts across the speaker to make sure that it doesn't see any DC. Most designs don't do this as it adds cost to the design. I don't think it's an option.
SolderIron
Super Member
Looks like a clean add on as added protection to the speakers. Thanks.
laatsch55
Super Member
If you drive a modern output transistor, like the MJ21196 HARD, heat can get it. The SOA in the PL 700's for the 96's is pretty good, but heating will take it to the edg, and beyond. The heatsinks on the 700 can get hot driving my K-horns and they are not a difficult load. But I do drive them very hard. Don's board is so simple to build and install and it works....I've triggered one at full tilt boogie on a WOPL and ir saved my K's. I'll use nothing else, because they work.
ChopperChas
Super Member
Cool. I may snag one, but right now I'm still building my rack, and the room that the rack goes into. (Taking out a wall, replacing it with a beam, drywall, hardwood, etc).
So, might be premature at this point, since I'm not even using the PL gear yet.
Charles.
So, might be premature at this point, since I'm not even using the PL gear yet.
Charles.
SolderIron
Super Member
>The SOA in the PL 700's for the 96's is pretty good, but heating will take it to the edg, and beyond
Anybody have a copy of the electrical spec on the 700 output transistors? I am trying to find the Vce max, Pd, and Ic max etc on the device. I know what to use for replacement, but want to know the specs on the original.
Anybody have a copy of the electrical spec on the 700 output transistors? I am trying to find the Vce max, Pd, and Ic max etc on the device. I know what to use for replacement, but want to know the specs on the original.
I love my WOPL and so do my neighbors down the street 
laatsch55
Super Member
Here's the XPL-909 data sheet, AKA DTS-411
Attachments
SolderIron
Super Member
Thanks You, Sir!
I been looking for it a long time. One time I had the DTS data sheets then throw them out thinking I will never need them again.
I been looking for it a long time. One time I had the DTS data sheets then throw them out thinking I will never need them again.
TRC
Well-Known Member
This just me personally, but every piece of Carver equipment I've owned sounded weak and wimpy. No authority whatsoever. I currently have a C-4000 with a TFM-15CB. I've taken the later out of service and replaced it with a Rotel RB-5000. Sounds better, but still no authority. My main audiophile system consist of a Parasound pre amp, Bryston power amp, and Vandersteen speakers. Has anyone else noticed weak, wimpy sound with Carver..? No offense to Carver owners.
laatsch55
Super Member
You've never listened to a White Oaked 700 obviously, weak and wimpy would not be the words you would use....http://forums.phxaudiotape.com/forum.php?tabid=2
That's were the power hogs hang.. Not near as sterile sounding as the Brystons, owned some. sold em after I built my first WOPL 1000
BTW--Got some homebuilt Speakerlab K's with the Crites 1526S woof, some BMS 4592 2" compresion drivers, Martelli Tractix wood horns, and the Crites CT125 tweet. Al Klabbenberger Universal crossovers. If anybody thinks K's don't rock, haven't heard mine, absolutely awesome combination of drivers...and they'll take 300RMS continously for hours...
That's were the power hogs hang.. Not near as sterile sounding as the Brystons, owned some. sold em after I built my first WOPL 1000
BTW--Got some homebuilt Speakerlab K's with the Crites 1526S woof, some BMS 4592 2" compresion drivers, Martelli Tractix wood horns, and the Crites CT125 tweet. Al Klabbenberger Universal crossovers. If anybody thinks K's don't rock, haven't heard mine, absolutely awesome combination of drivers...and they'll take 300RMS continously for hours...
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