[R-390] R-388 Crystal Filter ??

Mon, 21 Jan 2002 16:33:59 -0800 (PST)

Kenneth,

Quite correct. There is provision for 3 mechanical filters the bandwidth of which can be selected
from the control that is "behind" and to the left of the BFO pitch.

PLUS there is a 500kcs crystal filter with selectable bandwidth (5 position switch) + phasing
control, these are top most controls on the left hand side, so it has both.

In the 0 position of the bandwidth control, the crystal is bypassed.

The 51J (1&2) the 51J3 (R/388) and the 51J4 all have the crystal filter, only the 51J4 (and the
51J3 with a conversion kit) have the mechanical filters.

Rodney
VK2KTZ

--- Kenneth Crips <[email protected]> wrote:
> A nice description of the 51J4 can be found at the
> Following site. http://www.wa3key.com/51j4.html The thing that puzzles me 
> about this excellent description is It describes the 51J4 as having crystal 
> fliters.  I thought the 51J4 (R388A/URR)had mechanical filters.
> 
> 
>                       Ken
> 
> 
> 
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