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
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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
