I think you have later versions of the 1792. My one only tunes in 10Hz
steps and I know others mentioned on this reflector have 1Hz tuning.
Wonder if the later version is specified down to a lower frequency.
Incidently, returning to an earlier topic, the current Naval standard HF
receiving antenna on board ships is an active whip, made from a 2m
length of 50mm diameter Al pole. The amp is made from three E88CC
valves in parallel, operating in a cascode / common collector circuit.
A company somewhere is working on a solid state replacement based around
power FETs, but don't know the progress on that. The amp is specified
as having a 50dBm third order intercept point and by my reckoning could
function as a power amp delivering over 10W. That's linear !!!
Frequency response is 10kHz to 60MHz.
Ships do have the advantage of a near perfect groundplane so presumably
they can get away with this sort of antenna to lower freqs than normal.
Andy 'JNT
C1,4,11 are all marked as 1 not 0u1 on both the cd and the components
list. The only difference is that 1 is a polyester 100v
whereas 4 and 11 are
ceramics 50v. Unfortunately nowhere on the five sheets sent
to me by the
vendor is there an issue or date reference. Still, with the
components
I had to hand, it now works, if out of spec.
Thanks to all who took the trouble to send information, it is much
appreciated.
73, Brian
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73 Brian CT1DRP IN51QD 41 09 58N 08 39 11W
http://homepage.esoterica.pt/~brian
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