Full capacitor mods plus Voskhod 6H23N precision matched pair of valves, 3K9 gain mod, under the board 3D soundstage mod, Brand new input / output (Jalco Pro headphone socket and gold plated phono socket) all signal path solder joints desoldered and resoldered with 60/37/3 (3% silver solder), Blue LED plus 5K glow taming resistor sounds like heaven.
Shite photos..... blame December for that!..... but they give you the general idea:
A total electrolytic recap on this classic / rare Musical Fidelity X-TONE tone control.
After the recap:
I removed all of the electrolytic capacitors and replaced them with good quality types. In the PSU section I replaced the 470uF caps with 1500uF Panasonic FM (105C rated) caps (extra capacitance) and the rest of the caps were a mixture of ELNA Silmic ll (Japanese silk fiber caps) and Nichicon MUSE non polar input coupling caps.
I also fitted a new 4 way gold plated input / output phono socket and a new 2.1mm DC power input socket so this puppy will be good to go for many years to come.
Jim Farrell's X-CANS amp (V1) / 16th February 2020
Removed all 29 capacitors and fitted top quality ELNA Silmic ll, Nichicon MUSE, Nichicon AUDIO, Panasonic FM / FR, Samwha VA, WIMA MKS4 caps.
Extra capacitance in the Power section of the board...... top quality C103 / C203 non polar Nichicon MUSE input coupling caps...... ELNA Silmic ll (Japanese silk fiber)..... the best possible caps for the job.
Sounds as sweet as a nut!
Every solder joint was desoldered and resoldered with 60 / 37 / 3 % (3% silver) solder.
DC socket replaced with a new one..... Quad phono socket replaced with a new one...... headphone socket replaced with a new Jalco Pro socket.... Blue LED and 5K glow taming resistor fitted..... pretty much a total rejuvenation all round.
Precision matched pair of JAN Philips 6922 (matched triodes / Gain / Transconductance etc.) Valves fitted.