ATI Technologies P100S Operating And Maintenance Manual - Page 4

Browse online or download pdf Operating And Maintenance Manual for Amplifier ATI Technologies P100S. ATI Technologies P100S 6 pages. Stereo turntable amplifier

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Plug cartridge leads into the phone jacks. Convention is white for left channel,

red or black for right channel.

Your Encore preamp is decorated with more beads that Bo Derek (Who?). Well

our beads are ferrite and although we don't have nearly the movie stars capacity,

what we do have is tuned for good FM and AM rejection. Any RF shielding and

suppression system is no better than the ground system into which it is trying to

dump the unwanted RF. If you have a decent ground system and still have RF

problems give us a call and we will hold a telephone prayer meeting. If you don't

have a ground system you will still be okay as long as you don't turn on your

transmitter.

Output connections are indicated on the liable. DO NOT GROUND either HI or

LO output terminals. If you are driving a single ended (unbalanced – one side

grounded) high impedance or 600 ohm load it should be connected between

either HI to GND or LO to GND. If you are driving a balanced load connect it

between HI and LO output terminals. It is generally unnecessary to terminate the

P100 with a 600 ohm load if it is driving a high impedance input although placing

a terminating resistor across a hi Z input at the receiving end will occasionally

reduce RF pickup between the preamp and the console input.

ADJUSTMENTS

Your P100 has sufficient gain and output to overdrive some console inputs,

particularly those providing preamps for high level inputs. Full clockwise settings

of the level set pots will provide app. +10dBm balanced output at a reference

5cm/Sec, KHz recording level from a cartridge providing 1mV/Cm/Sec. Two

o'clock on the level pots is app. 0dBm while Twelve o'clock equals –10dBm,

however for lower nominal output levels a fixed attenuator pad should be placed

between the preamp and console input.

Trimming the cartridge loading can optimize the response, brighten a dull

sounding cartridge or smooth out a peaky high end. You can trim by ear, use a

test record or just putt out J7 and J8 which leaves the cartridge terminated with

200 pf, a good nominal value. If you lose the little jumpers, replace them with

#26 wire (.015 DIA) or flatten some cut off resistor leads to .015 thick so that they

can fit comfortable in the DIP socket.

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