1. Performing the hum fitz mod for the cathode bridge, should I remove the 2 1k resistors while adding 220uF caps of decent quality ? (annoying hum at left channel for a long time now with Tung Sol preamp tube)
2. Can i remove the output all together If I don't need it ? Can I simply remove the 2k resistor and the 0.47uF cap ?
3. getting an alps rk27 100k is a smart idea considering the gain increase from the 220uF caps right ?
4. planning on removing the 10uF caps on the output stage and replace them with a single 80uF'ish of good quality cap, good idea ?
5. anything else I might as well replace I am not aware of ? since i'm already doing all of the above
6. is it ok to replace the 33 ,10k ,820 and 1M resistors with ALLEN BRADLEY ones ? considering i measure each for accuracy since they are 5%
1. Typically, the resistors are left in. Another head-fi'er
posted an alternative to the Fitz mod to temper the single channel buzzing w/o the Fitz mod gain issues.
2. You may. As described elsewhere, performing this mod brightens the DV sound, thereby bringing it closer to the Crack. I cannot verify if this true or not.
3. Yes, the gain from performing the Fitz mod with 220uF caps is really noticeable with 6C8G tubes that some of us roll with our DV's due to the higher amplification factor of those tubes. With the stock 250K volume pot, listening volumes are at around 8 o'clock or below. Below 8 o'clock = channel imbalance. Replacing the stock volume pot is my next mod too. From a Yaqin Darkvoice mod thread, this
post shows supposedly the wiring of the volume pot PCB. From the same thread, here's a
post describing the difficulty of removing the stock volume pot from the front plate.
4. Don't know. People have replaced the 10uF output caps
here and elsewhere (dive into the any of the links in this post, embedded or listed below)
5. Don't know either, but please post the results of your mods,
6. Don't know, but I hope others can chime in.
Other posts:
https://www.head-fi.org/threads/dv-336se-hum-fitz-mod.353079/page-2#post-5248489
https://www.head-fi.org/threads/dv-336se-hum-fitz-mod.353079/page-2#post-5480248
https://drop.com/buy/dark-voice-366se/talk/556072
https://www.reddit.com/r/headphones/comments/51tnl6/whats_required_for_modifying_a_darkvoice_336se/
EDIT: bunch of links and added a Fitz mod alternative...