HAMTRONICS r304 Installation Operation & Maintenance Download Page 10 | Manualshive

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©1998 Hamtronics, Inc.; Hilton NY; USA. All rights reserved. Hamtronics is a registered trademark. Revised: 4/2/03

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Summary of Contents for r304

Page 1: ...ting hardware to provide the dc and speaker ground connections to the ground plane on the board so metal standoffs and screws should be used for mounting Electrical Connections Power and input audio o...

Page 2: ...doesn t require much rou tine maintenance many receivers don t get their oscillators tweaked as a matter of routine any more but they should The adjustment should be done using an accurate service mo...

Page 3: ...switch settings for one of the frequencies and simply which of the lower value switch sections to change to raise or lower the frequency for the other channel It is not neces sary to recalculate the...

Page 4: ...crystal filter and if misadjusted ripple in the filter re sponse will result in a little distortion of the detected audio If it becomes necessary to adjust T1 tune the sig nal generator accurately on...

Page 5: ...heatsunk to the pc board through the many ground pins on the ic When running moderately low au dio levels as most applications re quire it is no problem to use an ic socket so we have provided one for...

Page 6: ...ading on the loop filter Any current loading no matter how small on the loop filter causes the phase detector to pump harder to maintain the tuning voltage The re sult is whine on the signal Such load...

Page 7: ...lator 5 5 6 8 Q9 sq open 0 0 8 sq closed 0 0 65 0 1 Table 6 Typical IC DC Voltages U1 1 4 U1 2 4 U2 1 2 1 U2 10 2 5 U2 2 5V locked U2 11 2 5 2 5V unlocked U2 12 5 U2 3 8 U2 13 3 U2 4 8 U2 14 5 U2 5 8...

Page 8: ...a C37 100pf C38 C39 4 5pf var white ceramic with brown cap C40 001uf C41 5pf C42 6pf C43 5pf C44 0 47 f electrolytic C45 0 15 f mylar red C46 C47 001uf C48 0 15 f mylar red C49 C50 01 f C51 470 f elec...

Page 9: ...1998 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 4 2 03 Page 9...

Page 10: ...1998 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 4 2 03 Page 10...

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