[TenTec] Omni 6 PLis 1st IF CW Filter

[Jery Volpe]

Larry,

Has anyone sent the instructions to you on how to replace the filter?

First of all you don't have to worry about the gain jumper setting as 
they are the same for either the 500 Hz or 250 Hz filter. All you will 
have to do is turn the Omni over on its back and remove the lower outer 
cabinet shell. You can then see the annotated aluminum chassis shield 
itself. You don NOT have to remove the entire shield but just a much 
small portion.

I know your eye sight is not too good from what you say. Nevertheless, 
if you have the manual go to page 3-14 where you will see a picture of 
the underside of the Omni. Please look to the top, left portion of this 
figure. If you don't have the manual position your Omni on its back so 
that the front panel knobs are toward you. In this position the RF 
heatsink is furthest away from you and to the left. The 9 MHz filter 
board is just in front of the RF power amplifier/heat sink. There is a 
small access panel on the bottom aluminum shield which you can easily 
remove to get to this filter board.

There can be up to three total filters on the 9 MHz  board. The 
left-most filter is standard (2.4 KHz) and always present. The middle 
filter is usually used for the 1.8 kHz filter and the one on the right 
used for the CW filter. However the CW filter could be in the center.

If you find you already have an open filter position on this 9 MHz 
filter board you have two choices. a) You can retain your current 500 Hz 
filter which is either in the middle or right slot and install your new 
250 Hz filter in the other slot and set its jumper to match the other CW 
filter and then have two CW filter choices; OR b) You can pull out the 
existing CW filter and just install the new one in its place and leave 
the jumber setting as it is. The filters ARE NOT polarized so you can 
install them in either direction.

I hope this helps.

By the way, Should you choose you want to sell the 500 Hz filter at some 
point send me an email. I haven't filled that slot and would like to at 
some point.

Good Luck!

Jerald Volpe
KG6TT
Albany, CA