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Eros Phono / Re: Orientation of VH Audio CU-TF Caps in Eros Upgrade – 0.01µF RIAA + 1µF Coupling
« Last post by Paul Birkeland on Today at 05:32:41 AM »That all sounds correct.
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Eros Phono / Orientation of VH Audio CU-TF Caps in Eros Upgrade – 0.01µF RIAA + 1µF Coupling
« Last post by MikkelR on Today at 03:18:40 AM »Hi all,
I’m in the middle of a capacitor upgrade on my Bottlehead Eros and wanted to run a quick question by the group regarding capacitor orientation—specifically for the VH Audio CU-TF (Copper Foil Teflon) caps.
I’ve done quite a bit of soldering over the years and feel good about the install, but as always: measure twice, solder once. The guidance from VH Audio around outer foil orientation has me second-guessing slightly, especially in terms of getting it right for noise rejection and shielding.
I’m focusing on two parts of the circuit:
1. The 0.01µF caps in the RIAA EQ network
2. The 1µF 400V output coupling caps
⸻
Here’s what I’ve gathered from Bottlehead documentation:
1µF Output Coupling Cap – Between T9 (T10) and T6 (T7).
The outer foil (or negative) side should face T9 (T10), which leads to the preamp’s 47kΩ input (lower impedance).
0.01µF RIAA Cap – Between T4 (T11) and T5 (T12).
The outer foil side should face T5 (T12), which is grounded in the EQ network.
Does this match your experience? I think I have the orientation right, but before committing fully, I’d love to hear from anyone who’s used CU-TFs in this build—especially if you noticed any difference in hum/noise floor depending on foil orientation.
Thanks a bunch in advance!
Cheers,
/Mikkel
I’m in the middle of a capacitor upgrade on my Bottlehead Eros and wanted to run a quick question by the group regarding capacitor orientation—specifically for the VH Audio CU-TF (Copper Foil Teflon) caps.
I’ve done quite a bit of soldering over the years and feel good about the install, but as always: measure twice, solder once. The guidance from VH Audio around outer foil orientation has me second-guessing slightly, especially in terms of getting it right for noise rejection and shielding.
I’m focusing on two parts of the circuit:
1. The 0.01µF caps in the RIAA EQ network
2. The 1µF 400V output coupling caps
⸻
Here’s what I’ve gathered from Bottlehead documentation:
1µF Output Coupling Cap – Between T9 (T10) and T6 (T7).
The outer foil (or negative) side should face T9 (T10), which leads to the preamp’s 47kΩ input (lower impedance).
0.01µF RIAA Cap – Between T4 (T11) and T5 (T12).
The outer foil side should face T5 (T12), which is grounded in the EQ network.
Does this match your experience? I think I have the orientation right, but before committing fully, I’d love to hear from anyone who’s used CU-TFs in this build—especially if you noticed any difference in hum/noise floor depending on foil orientation.
Thanks a bunch in advance!
Cheers,
/Mikkel
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General Discussion / Re: Another Kaiju or Stereomour II post!
« Last post by Dzrout on Yesterday at 07:13:41 PM »Anything worth doing is worth overdoing….
If I bought the Stereomour, I’d always wonder what I was missing out on.
I don’t think this would happen in reverse.
If I bought the Stereomour, I’d always wonder what I was missing out on.
I don’t think this would happen in reverse.
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General Discussion / Re: Another Kaiju or Stereomour II post!
« Last post by Paul Birkeland on Yesterday at 04:14:47 PM »Yes, the only disadvantage you'll have is price and space occupied by the equipment. 2A3 tubes also tend to cost a little less.
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General Discussion / Re: Another Kaiju or Stereomour II post!
« Last post by Dzrout on Yesterday at 03:58:23 PM »I suppose the Kaiju with the PreBee2, would be “better” than the Stereomour…..l
I think I’m just going to do that and be done with it.
I think I’m just going to do that and be done with it.
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General Discussion / Re: Help choosing the right kit for my new headphones
« Last post by FalconGK1 on Yesterday at 04:53:35 AM »Thanks Paul! Would just the base model Mainline do the job? Or would I be looking at necessary upgrades? That one seems to be a bit more expensive, do you have a recommended place to look for those second hand if need be?
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General Discussion / Re: Help choosing the right kit for my new headphones
« Last post by Paul Birkeland on Yesterday at 04:44:14 AM »Those are exceptionally sensitive headphones, and really would be better fed by the Mainline, which is just a bit quieter than the SEX amp.
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Kit Assembly Service / MOVED: Help choosing the right kit for my new headphones
« Last post by Paul Birkeland on Yesterday at 04:39:54 AM »This topic has been moved to General Discussion.
https://forum.bottlehead.com/index.php?topic=15807.0
https://forum.bottlehead.com/index.php?topic=15807.0
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Moreplay / Re: 2 Questions: Attenuators and Remote Volume Control
« Last post by Rockyhill on Yesterday at 03:07:59 AM »Put in the volume pot mod, now have greater range of control without the attenuators. Thanks!
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General Discussion / Help choosing the right kit for my new headphones
« Last post by FalconGK1 on March 27, 2025, 07:37:42 PM »A gentlemen I was looking to commission for a build on ETSY told me to reach out to on here and to Paul. I have a new pair of Meze 109 Pros, and will be primarily using a Technics 1200GR via my Darlington MP7B phono. He indicated for such a highly sensitive headphone (40ohm) that the S.E.X. Build with the Mundorf SGO cap upgrade may be the perfect option. I was first looking for your advice and second wondering what this build would cost me through you.. or if maybe looking second hand or refurbished may fit my budget better. Thanks in advance, as I am just now getting my feet wet with the headphone side of hifi adventures. I will be expecting my first child soon and need a quieter avenue to fill my musical needs. Cheers!