"Tom Evans, AG9X" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Peter,
I also have a 1.8 KHz SSB filter. When I switch from the 2.3 KHz
filter to the 1.8, the extreme lows and a little of the extreme highs
of the audio are reduced. I do not hear any echo.
You can do a quick test using the TR-7 S-meter. It's not 100%
accurate, but it's fairly close.
Here's what I did.
1. Put the TR-7 on a dummy load on 10 meters.
2. Turn on the calibrator.
3. Zero beat the calibrator frequency.
4. Turn on the PBT.
5. Adjust the PBT control for maximum S-meter reading.
6. Tune upward to the frequency where the S-meter drops one S-unit
from the peak. Write down the frequency.
7. Tune downward to the frequency where the S-meter drops one S-unit
from the peak. Write down this frequency.
Here's what I measured:
2.3 KHz Standard SSB filter
28751.1 high
28748.9 low
-------------
2.2 KHz
1.8 KHz Narrow SSB filter
28751.0 high
28749.5 low
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1.5 KHz
6.0 KHz AM filter
28752.9 high
28747.2 low
-------------
5.7 KHz
73, Tom AG9X
On 2/7/07, Keong Family <[EMAIL PROTECTED]> wrote:
I have a 1.8 khz narrow SSB filter on my TR7.When using this filter it is
very hard to center on speech and is very echo like.Pressing the PBT
improves things dramaticlly.Filter works great on CW and almost makes you
think it has been mislabelled?Any comments.
Thanks Peter
Zl2PW
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