#a80vu

Gerhard's restoration (cont') . Replacing the +40 years old, tired and oxydized "CALIBRATION" switches eventually allows normal, easy audio alignment of the A80VU... as this short vid demonstrates it: first half shows channel 1's switch in operation before replacement, second half the very same component AFTER replacement. . It's clear now that there is no more intermittents on the displayed level 😊👌 . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #Repair #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BoV2D75Bprk/?utm_source=ig_tumblr_share&igshid=13c6dzn4u6yd8

Gerhard's restoration (cont') . Now working on the Reproduce Preamplifier boards 1.080.804 . After having desoldered ALL polarized caps (was a hell of a mixture of original, '70s Studer tantalums as well as either new tants or a blend of different electrolytic caps' brands... what's more, not of the high quality names you'd expect in a high-end Studer recorder 😥), and after having replaced the TBA931 op-amp 14-pin sockets with 8-pin ones to host the more modern (that is, much lower noise floor) NE5532s, current step is to prepare the 5 x 12 = 60 wire jumpers that will enable the use of the new op-amps (of course, all compensation components for the old TBA931s have been removed). Then I'll move on to soldering the new capacitors 😉 . And yeah, you've read me well: twelve Reproduce Preamp PCBs... in an 8-track machine!!! 😮 Meaning this unit has only FOUR Sync Preamp boards instead of the expected eight ones... eventually meaning a lot more work for #TheGoodDoctorPrager to modify the four extra Repro Preamp PBCs into Sync Preamp cards... 😪😪😪 . #Studer #A80 #A80VU #A80VUMKII #StuderA80 #StuderA80VU #StuderA80VUMKII #8track1inch #AnalogMultitrackTapeRecorder #Restoration #gerhardstuder #StrangeLoveAudio #StudioStrangeLove #StudioPiscineATokyo #LeBonDocteurPrager

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