Preliminary checks and adjustments;

1. Preset all coil slugs to the top of their forms.
2. All adjustments are with PTT keyed.
3. Crystal Frequency = Operating frequency / 36 (i.e. 444.900 MHz =  12.358333 MHz XTAL)
4. Oscillator Measurements are made via black meter plug on exciter, connect negative lead of volt meter to ground.
5. Power Measurements are made with a Watt Meter connected to antenna jack with 50 ohm load.
 

Step	Test Point	Tuning Control	Meter Reading	Procedure
1	Pin 2 (Mult-1)	L101, L102	See Procedure	Tune L101 then L102 for Maximum meter reading
2	Pin 2 (Mult-1)	L102	See Procedure	Adjust L102 1/8 of a turn counter clockwise
3	Pin 1 (Mult-2)	T102, T101 & T103	See Procedure	Tune T102 then T101 for Maximum meter reading, Tune T103 for a dip in the reading
4	Pin 3 (Mult-3)	T104, T103 & T105	See Procedure	Tune T104 then T103 for Maximum meter reading, Tune T105 for a dip in the reading
5	Pin 9 (Ampl-1)	T106 & T105	Maximum	Tune T106 then T105 for Maximum meter reading
6	Pin 6 (Power Out)	T107 & T108	Maximum	Tune T107 then T108 for Maximum meter reading, Twice
7	Watt Meter	T107 & T108	Maximum	Tune T107 then T107 for Maximum meter reading
8	Watt Meter	R8 on Power Block	30 - 35 Watts	Adjust R8 for 30 watts or desired power output level
9	Service Monitor or Frequency Counter	F1 on Channel element (ICOM)	On frequency	Adjust F1 until carrier output is on desired frequency

Tuning locations for Custom MVP VHF exciter.
 
 
 
 

Original concept and picture by Matt Krick K3MK
HTML Copyright 2002 Kevin K. Custer  W3KKC
All Rights Reserved.