Robert A. Wilson wrote:
> There are at least two Yaesu reflectors. Which one should we use?
> Let's continue this discussion on the one that generates the most
> Has anyone else noticed this behavior on an FT-1000MP? Whenever
> I switch to the 455 kHz 500 Hz CW filter, the S-meter briefly pegs to
> full scale while the receiver goes "dead" for about twice as long as
> it goes dead when switching to other filters (why it has to go dead at
> all is another mystery).
> I tried AGC in both AUTO and FAST, but it does not seem to make any
> difference in the "dead time" you get when switching filters. I
> disabled the "confirmation beep," but it still goes dead. FT-1000Ds
> also go dead when you switch filters. They go dead just long enough
> to miss a dot or truncate a dash (about 50ms I guess). I have never
> observed this behavior on other radios.
> I tried an experiment with two FT-1000MPs. Both radios had all filter
> options installed, including the subreceiver filter. Radio A had the
> "full scale glitch," but Radio B did not. I exchanged the 455 kHz 500
> Hz filters between the two radios. This made BOTH radios show the
> full scale glitch. Can anyone offer an explanation for this?
> Could the orientation of the filters make a difference? They are
> symmetrical; they can be installed in two orientations. The
> installation instructions don't say anything about orientation being
> important as long as you get all 4 pins properly seated in each
> connector. The pre-installed 455 kHz SSB filter was "upside down"
> compared to the photograph in the manual, so I did the same.
> The 500 Hz 455 kHz filter is the only one that shows this glitch.
> Switching to any other filter in any other combination never makes the
> S-meter jump to full scale.
> Bob, N6TV
I checked TWO MPs and they both acted the same way ... And they both have
ALL the filters installed exactly the same ... both have all slots full.
I looked at the schematic, and decided that the INPUT/OUTPUT were NOT the
same ... and loaded them in so that the 'labels' all read the same ... In
fact I think I pulled the "stock" ones out and flipped them over also ...
seems like I was trying to follow the "picture' on the PC board ???
You could try putting the 500 in the 250 slot, and see if the 'flicker'
follows ? Is there anything in the 8.2 slots ?
The SUB-RCVR also 'flickers' it's S-mtr, but not full scale, when the 500
for the sub-rcvr is kicked in ...
The other 'positions' do cause flicker, but the 500 hz does seems worst ...
Trying to recall if my IC-765 had a similar 'delay', but I have do not remember.
Let's see what other on here say also ... OK folks ... hit the buttons and tell
73 Bill AA4NU email@example.com