To: | tentec@contesting.com |
---|---|
Subject: | Re: [TenTec] Orion II Freqency response graph |
From: | "Rob Atkinson, K5UJ" <k5uj@hotmail.com> |
Reply-to: | Discussion of Ten-Tec Equipment <tentec@contesting.com> |
Date: | Wed, 19 Apr 2006 16:31:41 +0000 |
List-post: | <mailto:tentec@contesting.com> |
The solution is not to compensate for the high and low roll off with
equalizing. That just attempts to force the rig to do something it's trying
not to do. the result of that may be distortion and garbage. ideally, the
rig should pass the desired response with no effort and the eq. etc. used to
_attenuate_ audio in the proper places. It's interesting that the AM
response, which looks like what you would see with a broadcast transmitter
(except not as wide) would cover the lower frequencies with a nice gradual
tapering going up, but the ssb response is much narrower regardless of the
manufacturer's claim of something like 3.9 khz b/w. if the ssb curve can't
be changed, the solution is not to force it but to find another rig with the
desired response. TS870 comes to mind. rob / k5uj Not really - AM response is +/- 2dB from 20hz-3000hz don't get fooled by the vertical axis scaling I realize that. Problem is the way the +/- goes. Using 150 Hz as a reference, it's really a 4 dB DROP from 150 hz to 2400 hz on the AM curve when the radio is ostensibly set for a "flat" EQ response (TX EQ = 0). My internal and external EQ settings are quite different on the II than they Grant/NQ5T _________________________________________________________________ Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec |
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