This is about my only valve DAC, the Musical Fidelity Tubalog DAC. Some consider this model to be the best DAC from the British company.
|With Sony CDP-333ESA as transport|
|From top with cover|
MF used Torx screws with a rod in the middle to wart off "itchy fingers". Took a while before I was able to locate the correct screw driver to remove the lid to review the below. The pix was taken after I replace the 3 electrolytic caps on the board with the valves. The 3 caps were initially Panasonic FC. When I tested using stock Nichicon caps (with brown jacket), there was no noticable differences. Hence left the Nichicon in-place. The 2 large brown film caps on the same PCB as the valves were initially replaced by Wima's. Later the Wima's were replaced by Gad-Viva oil caps from Germany. The Gad-Viva's are worth every penny!
|Original before recapping (except for Panasonic FC on buffer PCB)|
PSU capacitors as these have to be less than 40mm in height.
|Bypass added to main PSU filter caps|
During the recapping process, the sound of the DAC becames more involving and natural. I took the opportunity to replace a few "el-cheapo" parts along the signal path, especially in the audio sections- really opens up the unit!
After some great results using ERSE Pulse-X capacitors in my speaker project, decided to substituite them into the Tubalog's output stage.
The result? As Gomer Pyle (shows my age) would say ... "G-o-l-l-y"!!!
Bass became firmer with clearity across the reproduction spectrum!!! Sounds superb thru my Meridian 201/557/A500 components