This Pultec is a rare ‘R’ version and works flawlessly. Vintage Pultecs will give you Mojo quite like nothing else. These units we’re handmade in the 1950’s. Incredible for round warm vintage tone when tracking and mixing.
The Pultec 1R was made during the same time period as 1A, and the differences are relatively minor. Foremost, 1R has a fixed freq HF ATTEN, whereas 1A has a 3-way freq selector. Secondly, 1R is supposed to have Peerless input and interstage transformers (and zobel network adjusted accordingly), with a 12AY7 preamp tube, whereas 1A is supposed to have Triad input and interstage transformers, with a 12AX7 preamp tube. Finally, a resistor in the power supply is increased to drop the plate voltage for 12AY7 in 1R.