[Drake] Carrier point adj. for TR4

[GGLL]

	Today I performed the adjustment following your method.  These are the 
tasks when a vernier in your wrist is indeed welcome  :)(well, better a 
multiturn trimmer ).
	But I managed to have both sidebands within what I guess is 1/2 watt 
each (Bird 43, 100 watts slug, steady carrier out 10 watts), and could 
not be better set.
	After that, I did a "manual" sweep at 50 Hz points, from 150 to 2700 
Hz, for each sideband. Setting the Mic level for a 100 watts out at the 
best frequency response. Audio generator B&K 4040.
	"Normal" sideband filter has the better shape (I was at 80 Mtr. band, 
so it was L filter), the "x" sideband filter lacks of response at lower 
frequencies, it get close to the normal filter only at 1050 Hz, just 
beginning a significant rise in power from 600 Hz.
	I'll plot on a spreadsheet all the values obtained, to "see" it better.
The ill filter ("x" sideband) also has readable response upto 2750 Hz, 
the other only at 2550 Hz, so I guess is shifted.
Conclusion: Tx audio response became better, but there's a lack of low 
frequencies response at opposite sideband, clearly noted in my TS-440S.


Best regards
Guillermo - LU8EYW.
Gary Poland escribió:
> Gruillermo,
>  I have no idea why the LSB filter fails in the TR-4. I have asked Bill 
> Frost at Drake and others but no one really has an answer. The filter 
> marked " 9.0 - 2.1L" always fails.
> 
> 73, Gary
>