Hello Warren
The addition of a modified PA0LQ audio filter would probably do the trick.
A good number of us on the NDB list are using 8Hz or narrower versions of
this filter with great success.
http://www.we0h.us/PA0RDT_Audio_Filter.html
Steve Ratzlaff has recently modified the 8 pole Vectronics CW audio filter
kit, model VEC-821K (list price of $29.95) to give switchable bandwidths of
6Hz, 7Hz and 14 Hz.
http://www.vectronics.com/
Details of that modification are available for anyone who is interested.
http://www.morsex.com/ sell the kit for $24.95
73s Tracey
I have a 1650/6 which Geoff mofided by the addition of an opto-encoder
for tuning as well as some other modifications. It works well but lacks a
narrow cw filter which would be necessary for LF work.
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