Справочник Пользователя для harbach-electronics ps-220

1

(2) Plate/Resistor Choke Assem blies

(4) #6 Lock W ashers (1 Extra)

(1) Tuning Capacitor Feed Suppressor

(4) 820pF 500V Ceram ic Disc  Capacitors

(2) 10

Ω

 2W  Meta l Film Resistors

(2) 27

Ω

 ½W  Resistors

(2) 0.01

µ

F 1KV Ceram ic Disc  Capacitors

To start the  installation, read thes e ins tructions very carefully.  Now unplug the amplifier

and remove any input, output and control cables that may be connected to the back of the
am plifier.  Place the amplifier on a book, front panel up, and remove the bottom screw s holding th e
feet and case in place.  Lift the case up and remove it from the amplifier.  Place the amplifier on the
bench with the front panel facing you.  You are now ready to proceed with the installation.

( )

Remove the 15 sheet metal screws that hold the perforated cover in place and remove this
along with the top rear plate co ver.

( )

Remove the tubes and remove the plate caps from the tubes.

( )

Remove and save the screw that connects the flexible braid from the HV terminal of the
plate c hoke to the doorkn ob capac itor mounted on  the end plate of th e tuning capacitor.

( )

Carefully unsolder and discard the braid from  the HV terminal on the plate choke, as w ell as
the 2 “pa rasitic suppressors”.  C lean out the outer ho le in the solder lug of the HV term inal.

( )

Put the plate caps back on the tubes.  Tighten securely and reinstall the tubes.

( )

Locate  the pec uliar w ire, the one w ith a straight wire paralleling a coil.  Slip the loop of this
wire over the screw removed from the doorknob capacitor and then put on a #6 lock
washer.  Screw this assembly into the doorknob capacitor.  Make sure the suppres sor w ire
is approximately lined up with the HV terminal of the plate choke.

( )

Fish the free end  of this assembly through the outermost hole in the HV terminal of the
plate choke.  Trim the lead to about 1/8” protruding.

( )

Slip the loop end of one o f the paras itic choke/resistor assem blies over one of the plate cap
screws  with the coil up, followed by a #6 lock washer.  Install this assembly on one of the
plate caps with the assembly pointing toward the HV lug.

( )

Fish the free end of this assembly through the outer hole in the HV lug and   trim   the end to
abou t 1/8”.

( )

In a like manne r, inst all the other parasitic choke/resistor assem bly onto the other plate cap,
trimm ing the end to 1/8”.

( )

Now solder the 3 wires going through the HV terminal of the plate choke.

( )

Turn the amplifier upside down with the front panel facing you.