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]
