Not really necessary if tubes come from the same date and lot (from same factory). If tubes come from different production dates maybe there can be subtle differences between them. To match electronic components (resistors, transistors, capacitors and tubes) is a good practice to ensure...

SebastianL wrote:   Thankyou, At first I was afraid because heard lot of comments about sound smearing when bypassing caps, but the results are very pleasant and satisfactory, and of course the amp sounds better than the original stock amp. The hot glue or another insulation is horrible...

  Sparkling inside tubes? Tubes should have near 2000 hrs of life (standard tubes, military made tubes will last even more). Make your own calculations based on your average listening sessions. Check the heater wires (6.3V from the transformer), maybe they have poor soldering and the tubes...

For LD mk III you can search on ebay for: DACT Type 21 Stepped Attenuator Potentiometer 100K 2A3 (let me clarify I don't have any relation with this seller and is not my intention to promote him). Not only will fit perfectly mechanical and electrical, but is a clear upgrade over the stock pot...

Never saw something like 50W or 100W  in audio pots.    All audio pots of this kind are max 1/4 watt; typical 1/8 watt or less for sure.  Sorry, can't help you with this. Alps pot used in LD mk III is, as far as I know,  old stock not in production now, but there is a huge inventory in China...

      Yes, all you said is truth.  But for the price is one of the best performing headphone (and line) amps out there.  And if you have some soldering skills and love mods and tube rolling, can be a very satisfying thing.  The bad is the little enclosure with almost no additional space...

After +250 hours can share the results of my mods (strictly IMHO).   Input cap: WIMA MKP10 3.3 uF  bypassed with Obbligato Gold 0.047 uF   Bypass for the output electrolytic stock cap:  Obbligato gold 0.68 uF  (didn't changed the output electrolytic stock cap because there is not enough...

The little dot mk III  comes with a 100kohm Alps 16mm diameter Pot.  From new I had some issues with this pot, sometimes when turning + or - the volume knob it was some noise (bad contact scratching inside the pot) and so I decided to change it.   At first I checked if  a bigger pot would...

After some hours of listening I found that Vishays 1837 get too much brilliant in the highs and are a not good by-pass cap for electronic signals (maybe if used at very little values of capacitance this trouble will improve). I like clear and open highs (not birilliant) and tried another...

Have to say that all the internal components on board in the Little Dot MK III are 85°C or 105°C long life ones, but never measured more than 45°C with my tester in the hottest point of the external enclosure side (very close to the tubes), even after  hours of use. Tubes generates heat but...

Will share my mods on my LD mk III.   First of all, one of my goals was not to change the external aspect of the LD mk III with cables running in and out and or external caps or components.  The LD mkIII internally have aprox 3.5cm height with aprox. 2.3cm over board space height to...

I have a comparison (just IMHO):   Imagine the sound of a clarinet or a saxophone and the performer playing  only with his (or her) lips surrounding the mouthpiece. Then imagine the same sound but the performer now bits with his (or her) teeths the reed of the mouthpiece of the clarinet...

Hi Acapella11, The 6AJ5 are dated May 1945, and the Voskhod are suposed to be 1983 ones. These are the first tubes I tried. Maybe soon will try another tubes. Thanks for your comments... Regards

I'm new to this forum. Also shared this same comments in the Little Dot forum page. I received my little dot mk III almost three weeks ago, and now I feel can share my impressions about driver tube rolling (strictly IMHO). I listened using a Sennheisser HD-650 and a upsampling DAC...