Ramsey Electronics FZ-146 Specifications download pdf (Page 119)

FX-146 • 119

programming explained in detail in the first pages of this Section.

In lieu of constructing diode bridges and wiring the channel selector switch,

you may elect to build your own switching system, using DIP, slide or toggle

switches. Do such projects only after your transceiver is finished and

working.

 Channel Switch S2 may be installed at whatever

point in the procedure that is most convenient

for you. Its purpose is to apply +5V to the

desired diode bridge. Connect the desired

channel positions on the switch to

corresponding matrix channel rows using 2"

lengths of hookup wire.

 For all channels installed at this point that you

intend for actual 2 Meter band communication,

remember to install a diode in the correct

position for Simplex, +RPT or -RPT. Install in only one position for any

given channel. Remember that the Receiver Frequency corresponds to

a repeater's output and that you are using +RPT or -RPT to match the

repeater's input frequency.

There is no need for diodes in the Simplex, +RPT or -RPT on any channel

intended only for listening. Also, be aware that omitting these diodes does

not completely disable transmitting capability. Be VERY careful and use

common sense when monitoring outside the ham band.

RECEIVER ADJUSTMENT AND OPERATION

At this point, we assume that all preceding assembly steps have been

completed for stages "A" through "H" and that Stages "M" and "TX"

associated with the transmitter have NOT been done. A jumper wire is still in

place between "+8R" and "+8V." All IC's are installed except U4.

NOTE: If you already have done parts installation in stages M and TX, it

would be better to finish that work and follow the test and alignment

instructions provided in those sections. You can still test and use the

receiver section without damaging the transmit section if the directions in

Stage TX are followed exactly. In particular, do not install L10, R32, L9 or

Freq

(MHz)

32K 16K 8K 4K 2K 1K 512 256 128 64 32 16 8 4 2 1

146.52

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162.55

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145.01

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Ramsey Electronics FZ-146 Specifications Page 119

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