[R-390] RE sensitivity below 8mHz

[Flowertime01 at wmconnect.com]

Pete,

You are correct about there being little reference to aligning the first IF 
slugs and
caps. The circuit is assumed to work just fine. Thus it needs little 
attention.

In the RF deck alignment procedure there is one paragraph.
Z213 gets tweaked at 1250 and 7250.

Z216 gets tweaked at 1900 and 1100

L215 gets tweaked at 1100

C205 gets tweaked at 1900

C213 gets tweaked at 7600

As you do the RF octaves, you just remember to stop on the 1,100 1,250 and 
7,600 as you go by and do the IF stages.

We just used the RF into the antenna input. Used the same generator level we 
used for the RF octave adjustments. Stop on the needed frequency and peaked 
the proper coils or caps.

You tweaked T207 once any where under 8Mkz
You tweaked T208 once any where under 8Mhz.

Any time you change the tube in the first mixer or oscillator you need to 
peak T207.

If your receiver does not perform as well under 8Mhz then the first mixer and 
Oscillator needs a look at. The receiver should have the sensivity under 10uv 
for all frequencies. But the receiver does have better sensitive above 8Mhz. 
That extra conversion stage under 8mhz takes it toll on the signals.

Roger AI4NI


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