Topaz 91005-31 Ultra Isolator LineNoise Suppressor 5kVA 0.0005pf 2.5kVA NOS

This the top of the line conditioning application Topaz 5kVA Ultra Isolator Line Noise Suppressor transformer. It’s very difficult to impossible to find, especially with the 0.0005pf (1 trillionth of a farad capacitance!) AND in this as new condition .

There’s also an NOS Topaz 2.5kVA available (with the same specs otherwise model 91002-31) in it’s original packing. These is new old stock, I believe, but bought years ago and can’t recall if it was barely used or unused.

HUGE amount of headroom and noise suppression with ultra clean power. Greater than 146 dB (attenuation) throughout the audible spectrum, up to 20kHz, equates to a 20,000,000-to-1 reduction of common-mode noise. They also provide 65 dB (1780:1) reduction of normal-mode noise.

I use an Elgar (brand) with the same specs where I live in a small village of 1000 at the end of the grid with incredibly dirty, inconsistent power. It’s a sonically beautiful almost magical thing to have such improved dynamics and inky black background from the ultra clean, steady and rock solid power by having the Elgar inline on a 30A dedicated line.

This Topaz Model no. 91005-31 Ultra Isolation Transformer is rated at 5000 VA, 50/60 Hz, 240/120 Volt
Small footprint (approx. 8 x 8 x 15 in.) and Exclusive shielding
UL and cUL listed & meets UL544 requirements
Reduces common mode and normal mode noise
Large opposing toroidal windings
Saves valuable space.
Protects sensitive loads from surges and spikes and prevents back feeding of noise from load to line
Low leakage current (full safe) allows use of products in hospitals and medical labs

Input voltage 120/240
Output voltage 120/240
Common-mode noise 146dB @ 100kHz
Normal-mode noise 65dB @ 100kHz
Overload capacity 600% for 1 cycle 300% for 30 seconds
Dielectric strength 5,000 VAC minimum
Frequency 47 - 400Hz for 50/60Hz model
Impedance 3 - 5% typical
Efficiency 95% typical

Wt. approx 100 lbs

We’ll have to work out shipping . Pick up encouraged. Happy to drive half way to meet for a cash deal - up to a couple of hours.