Tube-Tech CL 1B Handleiding
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1
TUBE-TECHCL1B
Compressor
DESCRIPTION.
TheTUBE-TECHcompressorCL1Bdiffersfrommanyothercompressors,inthatthegain-
reductionelementismadefromanon-semiconductorelement,whichinitselfhasaverylow
harmonicdistortionandnoneofthenon-linearityproblemsinvolvedwhenusingmost
semiconductorelements.Furthermorethereisnolong-termdegradationoftheelementthus
givingitalmostinfinitelife.Thiselementisplacedaftertheinput-transformerofthecompressor
andfollowedbyanalltube-basedamplifierwithagainof-
dBto+30dB.
Thusthesignalisnotfedthroughanysemiconductorcircuitryonitswaytotheoutput.
Theamplifierconsistsoftwotubes(valves)inpush-pullconfiguration(oneECC83asthe
pre-ampandphasesplitter,andoneECC82astheoutputstage),andanoutputtransformer.
Thepowersupplyforthepre-ampandphasesplitterarestabilizedandtheheatersofboth
tubes(valves)arefedwithastabilizedDCvoltage.
Thewholeamplifier(includinginputandoutputtransformer)andthepowersuppliesareplaced
ononePC-board.
Bothinputandoutputarebalanced(600
)andfullyfloating.
Thein/outkeyswitchesthecompressorinandoutwithoutclicks.
THESIDECHAIN:
Thesidechainistheonlypartofthecompressorthatcontainssemiconductors.Theyareused
forthreereasons:Firsttheydonotaffectthesoundreproduction,secondtheyhaveahighslew
rate,whichisofimportancefortheperformanceofthecompressorandthirdtheydon'ttakeup
muchroom.
ItcontainstwoJ-FETquadop-amps,onenpn-transistorandoneFET-transistor,whichhandles
thesignalforthegain-reductionelement.
Thecompressorcontainstwotimeconstantscircuits:
1.Fixedattackandreleasetimes
2.Variableattackandreleasetimes
The
attack/releaseselect
switchmakesitpossibletousethesetwocircuitsseparatelyor
combinetheirfunctions.
Thisgivesafeaturenotnormallyobtainedinothercompressors:
Inthecombined(fix./man.)statetheattack-andreleasecontrolsmakesitpossibleto
obtainacomplexrelease-timeslope.(Seepage4)
(980112)
Product specificaties
| Merk: | Tube-Tech |
| Categorie: | Niet gecategoriseerd |
| Model: | CL 1B |
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