#studera80vu

[piscineatokyo]

Gerhard's restoration (cont') . Marking all of Gerhard's audio boards (with small, colored, round labels, and corresponding channel numbers written on them) so I can keep track of: 1/ which have been possibly swapped (for testing and repairing purposes) and 2/ of course, preventing possible mess up of the audio alignment when it's done! ☺️ . 👌 . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #Repair #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager

[piscineatokyo]

Gerhard's restoration (cont') . Marking all of Gerhard's audio boards (with small, colored, round labels, and corresponding channel numbers written on them) so I can keep track of: 1/ which have been possibly swapped (for testing and repairing purposes) and 2/ of course, preventing possible mess up of the audio alignment when it's done! ☺️ . 👌 . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #Repair #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager

[piscineatokyo]

Gerhard's restoration (cont') . After having reinstalled almost all boards in the machine and reconnected all heads' cables, was time for some short tests... . Experiments with tracks 7 and 8 showed that track 8's VU-meter wasn't responding at all 😔After some research and measurements, found two dead AA116 germanium diodes on the VU module's board: precisely the ones rectifying the audio signal before sending it to the VU mechanism! . Replaced both with BAT42 Schottky diodes (like many other germanium diodes, the AA116 is way out of production since the 80's or so)... . ...and off goes the VU-meter: welcome back to work, dear! 👌😊👍 . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #Repair #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager

[piscineatokyo]

Gerhard's restoration (cont') . Five of the eight Reproduce Preamplifier PCBs are complete with their corresponding Repro EQ piggy-back boards, as well as four of the eight Sync Preamplifier PCBs and their respective Sync EQ cards... all ready to be reinstalled into Gerhard! 😊☺️ . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager

[piscineatokyo]

Gerhard's restoration (cont') . Still working on the recapping of the twelve Reproduce Preamplifier PCBs . All old polarized caps removed, installed the 8-pin DIL sockets for the forthcoming NE5532 op-amps, re-routed the signals accordingly... recapping may now commence! 😉 . But first things first: before soldering the new capacitors in, they must be prepared by having their legs' pitch adapted so that the caps can be more easily and more quickly fitted into the holes of the PCB. . That means manually kinking each of the 120 capacitors x 2 legs per cap = 240 legs, one by one... . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager

[piscineatokyo]

Gerhard's restoration (cont') . Recapping of all eight Record Driver Amplifier PCBs is now complete! 😊 . Took me more time than expected because of the many damages that had been done to the boards, certainly due to previous, not-so-good recapping: capacitors not of the same brand, same series, and probably badly desoldered and resoldered... up to the point of damaging a number of tracks and pads 😥 . Hopefully my repair work of these damages will last long enough before the next recapping... ☺️ . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager

[piscineatokyo]

Gerhard's restoration (cont') . All eight Record Preamplifiers are finally complete! 😊 . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager

[piscineatokyo]

VU-meter circuit works again: will stick to the original design for sure! 😊 Fini la contre-réaction excessive due à un ampli-op non-adapté : pour le circuit du VU-mètre, je m'en tiendrai donc au design d'origine ! 😊 #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #gerhardstuder #StudioPiscineATokyo #TheGoodDoctorPrager