SUB AF: Normal Sent from my iPad
> On Feb 27, 2018, at 11:35 AM, Thomas Doligalski <[email protected]> wrote: > > Normal > > 73, Tom W4KX > > Sent from my iPad > >> On Feb 27, 2018, at 11:23 AM, Mike Flowers <[email protected]> wrote: >> >> There is a CONFIG setting where you can choose BAL or NOR for the SubRX. >> >> I had BAL selected on my K3 and noticed low AF output from the SubRX. >> Changing this to NOR increased the AF output and made the SubRX behave the >> way I thought it should. >> >> Sorry that I don’t remember the parameter name ... >> >> -- Mike Flowers, K6MKF, NCDXC - "It's about DX!" >> >>> On Feb 27, 2018, at 8:11 AM, Thomas Doligalski <[email protected]> wrote: >>> >>> Checked that: antenna is the same for both receivers. And, the RF signal >>> level is the same for both: its the AF gain that has the difficulty. >>> >>> 73, Tom W4KX >>> >>> Sent from my iPad >>> >>>> On Feb 27, 2018, at 11:08 AM, brian <[email protected]> wrote: >>>> >>>> Tom, >>>> >>>> Any chance you haven't directed the proper antenna to the subrx? >>>> Try the MAIN antenna on both RX's. Choice is band dependent, so you have >>>> to make the right choice on all bands. It gets a bit more complicated if >>>> you have a tuner. The default antenna for the subrx becomes the UHF >>>> connector which is not the transmit antenna. >>>> >>>> The above is what I recall from years ago when I first installed a sub-rx. >>>> My memory may be faulty. >>>> >>>> 73 de Brian/K3KO >>>> >>>>> On 2/27/2018 15:11 PM, Thomas Doligalski wrote: >>>>> Also tried the front panel earphone jack, with the same results as the >>>>> rear panel jack. >>>>> >>>>> 73, Tom W4KX >>>>> >>>>> Sent from my iPad >>>>> >>>>>> On Feb 27, 2018, at 10:05 AM, Thomas Doligalski <[email protected]> wrote: >>>>>> >>>>>> I use stereo earphones plugged in the rear. I get equal volume in both >>>>>> earphones with the same AF gain settings until I turn on the sub >>>>>> receiver, when I get the diminished volume in the right headphone and >>>>>> have to turn up the sub receiver gain. >>>>>> >>>>>> Thanks, 73 Tom W4KX >>>>>> >>>>>> Sent from my iPad >>>>>> >>>>>>> On Feb 27, 2018, at 10:00 AM, brian <[email protected]> wrote: >>>>>>> >>>>>>> Thomas, >>>>>>> >>>>>>> You don't say if you're using earphones or speakers. >>>>>>> ------------------------------------------------------------- >>>>>>> If earphones: >>>>>>> >>>>>>> Are your earphones plugged into the front panel or back panel? >>>>>>> I had the earphone jack in the back make poor contact with the >>>>>>> earphones and low audio in one of the two channels. To troubleshoot, I >>>>>>> plugged earphones in the front jack and things were AOK. >>>>>>> >>>>>>> Try plugging earphones into the "other" jack. >>>>>>> >>>>>>> Don't overlook the earphones being the potential problem. >>>>>>> >>>>>>> Speakers OK? >>>>>>> ---------------------------------------------- >>>>>>> If speakers: >>>>>>> Are earphones OK? >>>>>>> >>>>>>> 73 de Brian/K3KO >>>>>>> >>>>>>>> On 2/27/2018 14:40 PM, Thomas Doligalski wrote: >>>>>>>> Larry W0LRF wrote earlier this month: >>>>>>>> >>>>>>>>> There have been a few posts on this subject, but none had answers. >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> Both my main and sub receiver are on the same antenna. >>>>>>>>> >>>>>>>>> The audio volume from the sub is much lower. >>>>>>>>> >>>>>>>>> The AF for the main is…… let’s say at 9 o’clock….. to get equal >>>>>>>>> volume level from the sum… Sub AF has to be at 3-4 o’clock. >>>>>>>>> >>>>>>>>> RF on both are the same. >>>>>>>>> >>>>>>>>> Any suggestions? Is this normal? >>>>>>>>> >>>>>>>> >>>>>>>> I have the same problem with K3 #969. >>>>>>>> >>>>>>>> All was fine when I first installed the KRX3, right after it was >>>>>>>> released. However, when I installed the new K3SYNA boards the audio >>>>>>>> problem for the sub receiver manifested itself. >>>>>>>> >>>>>>>> I have verified that the settings and filters for the sub receiver are >>>>>>>> the same as the main receiver. Note that the RF signal between the two >>>>>>>> receivers is identical, as shown on the K3 S-meter and the P3 display. >>>>>>>> >>>>>>>> Recently I noted the latest KRX3 installation manual (downloaded from >>>>>>>> electraft.com) has a section entitled "Checking and Modifying Resistor >>>>>>>> R91 and DAC Input Circuits”. The manual I followed when installing my >>>>>>>> KRX3 only had a similar section entitled “Checking and Modifying >>>>>>>> Resister R91”. >>>>>>>> >>>>>>>> The latest KRX3 installation manual states that the missing step >>>>>>>> involves cutting two traces on the main board board to the left of >>>>>>>> R91, with the justification that “This modification ensures the >>>>>>>> digital-to-analog converters (DACs) always receive the proper signal >>>>>>>> levels. It has been incorporated into all later K3s.” >>>>>>>> >>>>>>>> Could this be the cause of my Low sub receiver volume problems? Should >>>>>>>> I cut these traces now? >>>>>>>> >>>>>>>> Thanks and 73! >>>>>>>> >>>>>>>> Tom W4KX >>>>>>>> ______________________________________________________________ >>>>>>>> Elecraft mailing list >>>>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>>>>>> Help: http://mailman.qth.net/mmfaq.htm >>>>>>>> Post: mailto:[email protected] >>>>>>>> >>>>>>>> This list hosted by: http://www.qsl.net >>>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>>> Message delivered to [email protected] >>>>>>>> >>>>>>>> --- >>>>>>>> This email has been checked for viruses by AVG. >>>>>>>> http://www.avg.com >>>>>>>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [email protected] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
