Output Capacitor Upgrading Questions

[Jeb Jeb]

Awesome thanks Doc!

I Will definitely keep an eye on it.  I'll have it raised on a standoff so it'll be nearer the opening of the base so it should have slightly better airflow around it there and hopefully will be a bit cooler.

[Tom-s]

I'd like to do some cap rolling (ordered 9 types of Russian bypass caps). Is there any recommended switch to be used for this? Or just use clips? Would be nice if i could switch bypass caps while playing music.

[Doc B.]

I would suggest clipping or tacking them in one at a time as the most sensible approach.

If you decide to do the switch I'll suggest that you want the switch between the output end of the cap and the headphone jack, and that the out of circuit cap outputs get grounded when switched out of the circuit, ideally thru something like a 2.7K ohm resistor similar to the one on the headphone output. Make sure all of the cap inputs are attached to the plate voltage so they stay charged or you will get some nasty popping as they charge up when you throw the switch with the amp running, and also subject that poor switch to some gnarly inrush current. Also, no promises on what might happen to your headphones if something goes wrong.

In other words you want the caps to think they are in the live circuit even if they are not.

[Tom-s]

As always, thanks Doc!
Even with those resistors it's still faster than clip ons.

[Doc B.]

Faster, yes.  Just want to be sure no headphones get damaged by a transient in the effort to get that quick change from one cap to the next. It's nice to A/B on the fly, but I happen to think it's also a really good exercise to listen with some time gap between the two samples being compared. I think it helps one to hone their listening skills quite a bit.

[Tom-s]

Small follow up on the Russian MBGO's. Now about 80 hours in.
For the money (35€ shipped) they are really great! Big improvement over the stock electrolytics. Add a lot of depth to the music.
I went for 3x 30uf on each channel. Could have put an extra for each channel for lower impedance headphones but wanted the extra room for bypass caps and the PS cap upgrades.

[JamieMcC]

Small follow up on the Russian MBGO's. Now about 80 hours in.
For the money (35€ shipped) they are really great! Big improvement over the stock electrolytics. Add a lot of depth to the music.
I went for 3x 30uf on each channel. Could have put an extra for each channel for lower impedance headphones but wanted the extra room for bypass caps and the PS cap upgrades.

They work really well don't they you might also like to try adding a Russian Teflon bypass, I preferred this set up to the Mundorf mkp which have sat in my parts box ever since.

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2F6%2F6e%2F900x900px-LL-6ebf43ea_0023.jpeg&hash=571a1508b9aba5014e58ce30d12e17b4bb5af388)

[Tom-s]

Ordered a bunch of bypass caps. From the teflons i ordered ft-3 and k72. Also silver mica's and k40  k75pio's and kbg. Won't be at home for a few weeks so can't Connect them.

Edit:  Thanks JamieMcC! The FT-3 make a great upgrade in addition to the standard MBGO-2's.
I can't hear a difference with the K75-10's as bypass for the last PSU cap.
I'll remove that one in a few weeks and see if i hear a difference then.

[Tom-s]

This is what it looks like right now:
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fep1.pinkbike.org%2Fp5pb13286728%2Fp5pb13286728.jpg&hash=8b8de9646fc6af9ddf0536e3ac1e8807e8c1b703)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fep1.pinkbike.org%2Fp5pb13286724%2Fp5pb13286724.jpg&hash=421246973dc11bbd679530f0da354943cbe107ba)

[JamieMcC]

Nice job I'm pleased the pio caps are working for you They were a combination that I really liked after trying a good few options I think for the money they represent excellent value.

What's going on with your attenuators knob? I suspect you can adjust its height so it will sit flush with the top plate by winding up the nut below the top plate up a few turns.

[drewh1]

OK I am feeling a lot better about my own cap obsession now! 😇

[hpjun]

This is what it looks like right now:
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fep1.pinkbike.org%2Fp5pb13286728%2Fp5pb13286728.jpg&hash=8b8de9646fc6af9ddf0536e3ac1e8807e8c1b703)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fep1.pinkbike.org%2Fp5pb13286724%2Fp5pb13286724.jpg&hash=421246973dc11bbd679530f0da354943cbe107ba)

Wow the size of that thing! I think you could use the extra space from crack2.

[Tom-s]

Crack only grew a little taller. The footprint is the same. Even better, because of the new height i can strap the Schiit modi2u vertically behind the crack to gain some desk space.

[yay]

Bumping this old topic for a quick question:
100uF 350VDC Mundorf Evo Oil with a 1uF 1000VDC Mundorf Supreme Oil (can't seem to find lower VDC) as a bypass would work for the output capacitors?
asking before i order the wrong ones 

[TurbOSquiD77]

Double bump