1. Manuals
  2. Brands
  3. Trio Manuals
  4. Measuring Instruments
  5. DM-801
  6. Manual

Trio DM-801 Manual

Dip meter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
DIP METER
DM-801
TRIO

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DM-801 and is the answer not in the manual?

Questions and answers

Related Manuals for Trio DM-801

Summary of Contents for Trio DM-801

  • Page 1 DIP METER DM-801 TRIO...

  • Page 2: Table Of Contents

    CONTENTS: I N T R O D U T C I O N . . , F E A T U R E S S P E C I F I C A T I O N S ' . . . C O N T R O L S P R E C A U T I O N S A P P L I C A T I O N S :...
  • Page 3 . DM-801...
  • Page 4 Dip meter oscillation energy is absorbed where its frequency coincides with resonant circuit frequency under measurement. {A} I N D U C T I V E COUPLING Meter pointer deflection Oscillation frequency Oscillation frequency differs from resonant coincides w i t h reso- circuit frequency.

  • Page 5: F E A T U R E S

    F E A T U R E S 1. Measurable frequency range is 700kHz to 250MHz in seven bands. 2. All seven dip meter coils, capacitive probe, earphone and ground clip lead, can be carried within the unit for easy trans- port and storage.

  • Page 6: S P E C I F I C A T I O N S

    S P E C I F I C A T I O N S Frequency range: 7 0 0 k H z - 2 5 0 M H z ± 3 % A band 0 . 7 - 1 . 6 M H z B b a n d 1.5'-3.6MHz C b a n d...

  • Page 7: C O N T R O L S

    C O N T R O L S T o p Panel View Probe FT-243 crystal Pull o u t when socket (also ^operating induc- for coils) tive coupling HC-25U crystal Probe pin jack Coil socket (not for coils) Dial Sensitivity c o n t r o l / power switch - Meter...

  • Page 8: P R E C A U T I O N S

    A f t e r use, be sure to turn the POWER switch off. If your DM-801 will not be used f o r a long period of time remove the battery. You can easily remove it by pulling the take-out ribbon toward y o u .
  • Page 9 O p t i m u m Too close Too far Not good deep and broad dip Difficult to point see dip point Good Figure 3 — Distance Adjustment f o r Accurate Dip Point 4. Caution in Measuring Transmitters Your DM - 801 is usable as an absorption frequency meter in measuring transmitter power amplifier tank circuits, and similar stages producing high RF energy.

  • Page 10: A P P L I C A T I O N

    A P P L I C A T I O N S A- Use as a D i p Meter 1. Select an oscillation coil covering t h e desired frequency range. 2. Install the coil i n t o the socket on t o p of the d i p meter. 3.
  • Page 11 capacitor G r o u n d clip- Toroidal coil ( b ) G r o u n d clip Probe ( a ) ( c ) Figure 4 : Use of the probe 1 ~ 2 t u r n s A n t e n n a Center insulator element...

  • Page 12: Use As A Signal Generator

    For A M , set FUNCTION switch to " M O D " . If the output is too strong, lower the oscillation level, move your DM-801 farther away from the receiver, or use a shorter receiver antenna. Figure 6 - Use as a Signal Generator.
  • Page 13 D. Use as Crystal Checker and Marker Generator Your DM-801 can be modified as a crystal checker by installing a crystal in place of the oscillation coil (see Figure 7). You may use either HC-25U or FT-243 crystals. Also, an HC-6U crystal can be checked if plugged into the FT-243 socket.
  • Page 14 E. Use as an A b s o r p t i o n Frequency Meter Install an oscillation coil covering t h e desired f r e q u e n c y range i n t o the socket. T u r n the S E N S I T I V I T Y c o n t r o l O N and adjust t o the m i n i m u m meter d e f l e c t i o n (just before the O F F p o s i t i o n of t h e c o n t r o l ) , and set t h e F U N C T I O N switch t o OSC.

  • Page 15: Use As A Field-Strength Meter

    F. Use as a Field-Strength Meter Y o u r DM-801 can be used t o measure the field strength o f a transmit antenna. Set up as directed in A P P L I C A T I O N S , "Use as A b s o r p t i o n frequency m e t e r "...

  • Page 16: M E A S U R E M E N T

    A n inductance or capacitance can easily be calculated by sut stituting the known values into the above equations. The oscillation coils supplied w i t h your DM-801 are useful as th known inductor. Their inductances are: B A N D...

  • Page 17: A D J U S T M E N

    A D J U S T M E N T V R 1 : Q1 Bias adj. By using G band, adjust VR1 so that the meter pointer deflectior is maximum at 83MHz. V R 2 : Meter zero adj. Adjust V R 2 so that the meter deflection is zero when tht sensitivity control/power switch is set to just before the OFF...

  • Page 18: Part S L I S

    PARTS LIST M A I N C H A S S I S Parts N o . D e s c r i p t i o n R e f . N o . A 0 1 - 0 8 5 9 - 0 8 Case t o p Case b o t t o m A 0 1 - 0 8 6 0 - 0 8...
  • Page 19 D e s c r i p t i o n Parts N o . R e f . N o . L 3 7 - 0 0 1 7 - 0 8 " L 3 7 - 0 0 1 8 - 0 8 L 3 7 - 0 0 1 9 - 0 8 L 3 7 - O 0 2 0 - 0 8 L 3 7 - 0 0 2 1 - 0 8...
  • Page 20 R e f . N o P a r t s N o . D e s c r i p t i o n M I S C E L L A N E O U S K 2 9 - 0 2 5 6 - 0 8 K n o b P r i n t e d c i r c u i t b o a r d J 2 5 - 2 8 8 8 - 0 8...
  • Page 21 HIGH FREQUENCY UNIT ( X 8 4 - 1 0 4 0 - 0 0 )
  • Page 22 HIGH FREQUENCY UNIT ( X 8 4 - 1 0 4 0 - 0 0 ) < - > < _ J _L _L...
  • Page 23 AMP UNIT ( X 7 3 - 1 3 5 0 - 0 0 )
  • Page 25 A p r o d u c t o f T R I O - K E N W O O D C O R F * 6-17 3-choma Aobadai Magum ku. Tohy* 153 Japan © 0 6 0 0 6 P R I N T E D I N J A P A N B50-292C...

Table of Contents