By now, I hope you understand that you really should get a manual for the Exec II.   

But, some of you will want to try to do it without one.   To be honest, I've tuned a VHF version with only experience from the UHF version.   So I guess there are times that a few hints might be enough.

As time permits, I'll add tuning information on various parts.

First some general advice about tuning:

There's a sort of Zen thing about tuning Mastr II receivers. I've often hit the wall on sensitivity after following the procedure perfectly again and again.

I intentionally detune every control to just some random position. Then I got to bed.

The next day I start over, step by step. Only this time the voltages are a bit higher... then as you get to the later stages the voltages are much higher. Then everything falls into place and you have a great receiver. You'll swear you did it right the first time, and you probably did. But a night's sleep has fixed so many receivers I swear by this method.

UHF Exciter Tuning

Preliminary Checks and Adjustments.

1.    Place crystal modules for F1 on Exciter Board.  (crystal frequency = operating frequency / 36).

2.    For a large change in frequency or a badly mis-aligned transmitter, preset all slugs to the top of the coil form.

3.    Set output impedance matching capacitor to 1/4 mesh.

4.    Set all other air capacitors to minimum capacity (not meshed).

5.    (applies to multi-channel situations, not applicable with a repeater setup)

6.     Connect the red plug on the GE Test Set to the SAS Board metering jack, and the black plug to the exciter metering jack.  Set the polarity to +, and set the range to the Test 1 position (1 Volt position for 4EX8K12) for all adjustments.

7.    All adjustments are made with the transmitter keyed.  Unkey the transmitter between steps to avoid unnecessary heating.

Note: When aligning transmitter, proceed as instructed below.  DO NOT retune a previously tuned control unless specifically directed to do so.