harbach-electronics ss-221 User Manual
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it). Put the red lead from the SS-221 module through the same terminal lug, trimming as
necessary. Solder 5 wires at this lug.
necessary. Solder 5 wires at this lug.
( )
Put the (-) lead of the bridge rectifier that is opposite of the (+) lead through the cente r
(ground) lug of the term inal strip. Put the black lead from the SS-221 module through the
same terminal lug, trimm ing as necessary. Solder 3 wires at this lug.
(ground) lug of the term inal strip. Put the black lead from the SS-221 module through the
same terminal lug, trimm ing as necessary. Solder 3 wires at this lug.
( )
Solder the left lead of the bridge rectifier to the terminal lug that has the red wire f rom the
transform er soldered to it.
transform er soldered to it.
( )
Solder the loose red transformer wire (removed earlier) to the remaining lead of the bridge
rectifier.
rectifier.
( )
Po sition the bridge rectifier so that it is clear of any wiring. It will be held in place by its
leads.
leads.
( )
Locate the 8-32 screw just forward and to the left of the line voltage selecto r strip. This
holds down one corner of the HV tra nsformer. Remove the nut and place the #8 solder lug
(supplied) over the protruding screw. Replace the nut and hand tighten.
holds down one corner of the HV tra nsformer. Remove the nut and place the #8 solder lug
(supplied) over the protruding screw. Replace the nut and hand tighten.
( )
Take the 2 ZNR suppressors marked 14K20IU and put one lead of each through the new
solder lug. The other end of the ZNR suppressors goes to the end terminals of the voltage
selec tor term inal strip (NOT to the screws holding the strip dow n).
solder lug. The other end of the ZNR suppressors goes to the end terminals of the voltage
selec tor term inal strip (NOT to the screws holding the strip dow n).
( )
Position the ZNR suppressors and the ground lug so that the ZNR leads are in the clear.
Solder the 2 leads to the ground lug and trim off any excess. Now fully tighten the 8-32
scre w and nu t holding the ground lug and transform er.
Solder the 2 leads to the ground lug and trim off any excess. Now fully tighten the 8-32
scre w and nu t holding the ground lug and transform er.
( )
The ZNR suppressor marked 14K39IU is connected between the end terminals on the
voltage selector terminal strip (the same strip where the 14K20IU suppressors are
connected). Place the leads from the ZNR suppressors under the terminal screws and
tighten.
voltage selector terminal strip (the same strip where the 14K20IU suppressors are
connected). Place the leads from the ZNR suppressors under the terminal screws and
tighten.
( )
Dress the power leads back into the wire bundle and tie using la cin g, cord, string or tie-
wraps.
wraps.
( )
Locate the antenna chang eover relay an d ide ntify the wires connected to the relay coil.
The re should be a red wire on the lug nearest the front panel. Solder the lead from the
banded end (c athode) of one of the supplied diod es to the relay coil lug with the red wire
soldered to it. Solder the lead from the unbanded end (anode) of the other diode to the
oppos ite relay coil lug. Both free diode leads should be extending to the right, toward the
output coax cable.
The re should be a red wire on the lug nearest the front panel. Solder the lead from the
banded end (c athode) of one of the supplied diod es to the relay coil lug with the red wire
soldered to it. Solder the lead from the unbanded end (anode) of the other diode to the
oppos ite relay coil lug. Both free diode leads should be extending to the right, toward the
output coax cable.
( )
Bend the two free diode leads so that they touch, but are clear of any other wiring. Solder
these leads together.
these leads together.
( )
Place the SS-221 module in the c lear space in front of the input voltage selector terminal
strip, relays down. W hen a go od location has bee n found, lift the module and clean the
chassis at this location with alcohol or other similar cleaning fluid.
strip, relays down. W hen a go od location has bee n found, lift the module and clean the
chassis at this location with alcohol or other similar cleaning fluid.
( )
Place a small dab of s ilicon e ad hes ive on the top of each relay and place the SS-221
module back onto the chassis. Use a weight of some kind to hold the SS-221 module
down. Let the silicone cure for at least 12 hours (24 hours is better) before reassembling
the case to the am plifier.
module back onto the chassis. Use a weight of some kind to hold the SS-221 module
down. Let the silicone cure for at least 12 hours (24 hours is better) before reassembling
the case to the am plifier.