I think so. The Sig has the tube rectified PSU and Modwright teflon/oil caps. Some details from Modwright:
The SWLP 9.0SE is our answer to the 'complete' preamp, featuring a SWL 9.0SE tube linestage with external power supply and built-in full SWP 9.0SE tube phono stage.
Unlike other manufacturers who offer secondary phono options to their preamps, we literally combined our SWP 9.0SE phono and SWL 9.0SE linestage into one product.
The phono stage is installed inside the 9.0SE, where the power supply is normally installed. As a result, the power supply is made outboard, connected to the preamp with high-quality amphenol connectors and custom 10-conductor umbilical.
One of the advantages of this approach is to allow for ultra-quiet phono operation, with the power transformer well way from the sensitive high-gain phono circuits.
The SWLP 9.0SE functions as a standard tube linestage, with multiple line-level inputs, remote volume control, tape out and home theater bypass.
When used as a phono stage, not only is the cartridge loading set via internal dip switches for MM or MC loading, but gain (max 68dB) is infinitely variable. The volume control impedance is calculated as part of the RIAA filter and sits between the second and third gainstage. The linestage circuitry also serves as the final gainstage for phono.
FEATURES
MM & MC Phono Inputs with Cartridge Loading (Internal Dip switch settings) Five standard inputs: CD, tuner, DVD, Ht/BP, Aux.1 Front Panel Controls Include: Mute, Power, Stereo/Mono, HT/BP (Home Theater Bypass) and Volume control Remote Control Volume and Mute TECHNICAL SPECIFICATIONS
[*]Tube Complement: (2) 6C45 (Sovtek), (2) 6n1P (Sovtek), (2) NOS 5687 dual triodes
[*]Gain: 68dB Max MC gain