Includes premium construction with C&K Brand Silver contact toggle switches, and Deluxe Gold Plated RCA jacks.
These transformers are wired to connect a moving coil cartridge (on a turntable) to a phono preamplifier, phono input of a receiver, or your preamp's phono input.Switchable for 1:16 (24 dB gain) or 1:30 (30 dB gain).
Into a standard 47k phono preamp, the effective input impedance of the low gain (1:16 ratio) is 184 ohms. At 1:30, the effective input impedance is 52 ohms.Note: The 150 Ohm tap and the 37.5 ohm taps are specified by the manufacturer to provide 1:18 and 1:36.5, however 1:16 and 1:30 was measured using a 50 ohm audio signal generator at 1kHz with a 47k output resistance, which approximates the real situation of a moving coil cartridge load using this transformer into a standard RIAA preamplifier.
CONSTRUCTION TECHNIQUES: All connections are Resistance soldered using the American Beauty system which avoids heat damage to the delicate insulation on the hair-like wires of the transformers. Test equipment is very low current to avoid saturating the transformer cores. You can count on a premier product that is state-of-the-art.This unit includes a grounding post that can be used to connect your turntable ground and your preamplifier ground. It also includes a ground "lift" switch. In all modes, the transformer cases and faraday shield internal to the transformers are connected to the ground screw. In the "ground" mode, the phono system minus sides (negative sides) are connected to the grounding lug. This configuration works well for those systems where the turntable ground is connected to the negative leads coming from the phono cartridge or where the negative inputs to the preamp are internally connected to ground. In the "lift" mode, none of the conductors in the RCA jacks are connected to the case, ground, or shield and there is no electrical connection between channels. This design allows you much flexibility to mitigate for ground loops regardless of the configuration of your other equipment.
I take pride in each and every set and provide customer support to make sure that they work well in your system.
http://www.bobsdevices.com/Grounding.htm contains information on how to best connect this unit to your system including information on grounding and a sketch showing a properly constructed interconnect cable.
You can purchase this for $850.00. Payment by paypal or credit card. Shipping is $12 for US via Priority Mail, and $42 international via Express Mail.
Please email email@example.com to order and to make sure this is a match for your system and to select the switchable gain ratios. Other transformer combinations are available as are choices to upgrade connectors and chassis.
I challenge you to find a better built and quieter SUT anywhere.
For any questions or to order, please email firstname.lastname@example.org