I need to clarify Flex's position. A mic preamp is not required to operate the SDR1000-there is sufficient gain included in the software to run just about any low level microphone. We have not done a good job of documenting the various procedures to achieve the desired result; this is somethig we are working on.
On the other hand, a preamp is a worth while addition, not only for the SDR1K but for other radios as well when low gain microphones are used. The Behringer UB802 mixer at $39 is a best buy. It has 2 pre-amplified inputs and numerous outputs and phantom voltage. It is relatively RF proof. It also as an effective 3-band EQ. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Monday, July 31, 2006 9:26 AM To: philip gentile; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] flex use with a ribbon mic Phil, Yes, in my estimation (not agreed with by Flex, both Eric and John have both thumbs down my take on this), a good low noise mic pre-amp is a fine addition to the Flex set up. I use an inexpensive Beringher. In a thread a few weeks ago, I suggested this fix to a fellow Flexer that was having "echo" efffects with mic gain setting on front GUI of 50+. He was using a Heil Studio One mic. I suggested he get the GUI setting well below 35 and use a preamp. I never heard back from him, but maybe it worked. I certainly can say that this is an issue in my shack, and the pre-amp along with low settings on the console takes care of these issues. 73s -Dan K6KDK ----- Original Message ----- From: "philip gentile" <[EMAIL PROTECTED]> To: <FlexRadio@flex-radio.biz> Sent: Monday, July 31, 2006 6:20 AM Subject: [Flexradio] flex use with a ribbon mic > hi - > > i'm a ribbon mic junky and figured i'd hook one up to the flex. the mic is > a > shinybox #23. > > the mic has a very low output signal so i bumped the flex mic gain up to > fairly high levels. with that, i received audio reports mainly stating i > had > had terrible rf in the audio.out came the ferrites and copper shielding > tape, none of that helped. the vox and the noise gate also did not seem to > be stable. > > in the end, i installed an ART TubePac mic preamplifier (set to about 40 > dB > of gain) between the ribbbon mic and firebox, and set the flex mic gain > to > about 10+-. > > the audio reports are excellent now, the vox is a bit tamer and the noise > gate performs perfectly. i also monitor my audio on a 2nd receiver > occasionally to make sure things are working fine. > > anyone else see this type of behavior with high mic gains? > > as a note, i also tried the creative labs CB2530 bluetooth wireless > headphones instead of my trusty beyer 770's, much better, great audio, no > cables to strangle you and you can walk around, sit anywhere, and still > listen to the radio. the headphones exhibited no problems during 1500w PEP > transmit on 160 - 10 meters CW & SSB. > > thanks, > > phil AB2JL > > > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
