| Lies on EBay: Will It Ever End? [message #289655] |
Fri, 16 November 2007 01:31 |
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Klaus Heyne
Messages: 2027
Registered: April 2004 |
Platinum Member |
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http://cgi.ebay.com/Telefunken-UF14-UF-14-tube-for-Neumann-U 47-MIC_W0QQitemZ180178325973QQihZ008QQcategoryZ67816QQssPage NameZWDVWQQrdZ1QQcmdZViewItem
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1 Telefunken UF14 tube
This tube is electrically 100% identical to the VF 14 used in Neumann microphones except for a lower filament voltage (25 Volts instead of 60 Volts). This does not affect the sound, nor should any modification be done to the audio circuit.
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100% identical to VF14? Does NOT affect the sound?
If that were true, then why does the UF14 only cost 1/20th of a good VF14?
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The UF14 can be applied in Neumann microphones insteadt of the VF14 when a minor modification is carried out, i.e. 1 resistor should be inserted in the filament circuit to lower the filament voltage to the correct value for the UF 14.
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Really? Anybody who has ever tried to keep the mic's amp cavity from overheating with that extra heat machine of a resistor added may tell a different story. Then watch with horror as the plate voltage starts drifting downward from that extra heat, right into the noisy basement...
Folks, be forewarned!
Klaus Heyne
German Masterworks
www.GermanMasterworks.com
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