Sailor COMPACT HF SSB T2130, Technical Manual

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3 SERVICE T2130
3.5.1 POWER AMPLIFIER (MODULE 1)
Presettings. Note 2.
3.5.1.1 BIAS CURRENT
Select service programme SP-33, see section 3.9.1.
3.5.1.2
Connect an ammeter (F.S. 100 mA) in series with P1, and check that the current is 80 mA
±30 mA.
3.5.1.3
Select normal receive mode. Check that the current is zero.
3.5.1.4
Connect an ammeter (F.S. 1A) in series with P2, and check that the current is 450 mA
±100 mA.
3.5.1.5
Select normal receive mode. Check that the current is zero.
3.5.1.6 POWER GAIN.
Select service programme SP-29, see section 3.9.1.
3.5.1.7
Connect an oscilloscope with 1:10 probe (0.2V/div) across J01. Adjust the level to 1 Vpp by means of
the buttons ‘up’ and ‘down’.
3.5.1.8
Connect the oscilloscope with 1:10 probe (20V/div) to J02. Check that the level is 170 Vpp ±50V.
3.5.1.9 CHECK OF FULL POWER OUTPUT
Select normal transmit mode, frequency approx. 1.6 MHz. Connect the handset to RE2100.
3.5.1.10
Connect an oscilloscope with 1:10 probe (50V/div) to J02.
3.5.1.11
Key the transmitter and whistle into the microtelephone- Check that the level is more than
245 Vpp.
3.5.1.12
Select a transmitter frequency near to 25 MHz.
3.5.1.13
Key the transmitter and whistle into the microtelephone. Check that the level is more than
228 Vpp.
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