K3 Version 3.14
Locked
 
|
"I find I need full compression and full Mic gain to get near 100 percent.
> Have you updated the firmware since the compressor was brought back in > on AM?" Does the above version include the compressor on AM? Philip LaMarche LaMarche Enterprises, Inc. <http://www.instantgourmetspices.com/> www.instantgourmetspices.com www.w9dvm.com <http://www.w9dvm.com/> 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 K3 #1605 CCA 98 00827 CRA 1701 W9DVM ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Phil,
I don't know the answer to your direct question, but a perusal of the firmware release note indicate that the AM modulation was made closer to 100% in MCU 3.19, so you should upgrade if you are playing with AM. 73, Don W3FPR Phil LaMarche wrote: > "I find I need full compression and full Mic gain to get near 100 percent. > > >> Have you updated the firmware since the compressor was brought back in >> > > >> on AM?" >> > > Does the above version include the compressor on AM? > > > > Philip LaMarche > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by Phil LaMarche-2
Hi All,
I tried using these two items together and am getting scratchy audio in the headphones when I speak on USB even though the monitor is set to zero. When I use the rear headphones out to feed the HA400 it is really bad and loud. When I use the front headphone jack its medium loud but still not right. It can be heard on my transmitted audio. I tried using a battery to power the HA400 to isolate the ground but it has no effect. I did the "Modification Improving the Immunity of the Rear-Panel RS232 and Audio Connectors to RF" mod, and checked to be sure that the "Front Panel Microphone Circuit" mod had been done at the factory. I tried also using RG 174 for the audio feed. No change. I also removed the serial cable and had no change. Any suggestions would be greatly appreciated as I do need to have four headsets on the K3 for various ham demos. 72 and thanks, Steve, W2MY ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Does it vary with power output or with Tx Test? Could it be an RFI issue? I
was also unhappy with the audio on my HA400. Dick K6KR -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Steven Pituch Sent: Monday, November 16, 2009 2:13 PM To: [hidden email] Subject: [Elecraft] K3 & Beringer HA400 Hi All, I tried using these two items together and am getting scratchy audio in the headphones when I speak on USB even though the monitor is set to zero. When I use the rear headphones out to feed the HA400 it is really bad and loud. When I use the front headphone jack its medium loud but still not right. It can be heard on my transmitted audio. I tried using a battery to power the HA400 to isolate the ground but it has no effect. I did the "Modification Improving the Immunity of the Rear-Panel RS232 and Audio Connectors to RF" mod, and checked to be sure that the "Front Panel Microphone Circuit" mod had been done at the factory. I tried also using RG 174 for the audio feed. No change. I also removed the serial cable and had no change. Any suggestions would be greatly appreciated as I do need to have four headsets on the K3 for various ham demos. 72 and thanks, Steve, W2MY ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by Steven Pituch-3
Steve,
Just an idea - have you tried it on LINE OUT? It may be that you are overdriving the input of the Beringer. The other possibility is that you have an RF in the Shack problem and the Beringer is reacting to the RF. Try it when connected to a dummy load or in TX TEST. If that 'fixes' the problem, you have some antenna work to do to keep the stray RF out of the shack. 73, Don W3FPR Steven Pituch wrote: > Hi All, > I tried using these two items together and am getting scratchy audio in the > headphones when I speak on USB even though the monitor is set to zero. When > I use the rear headphones out to feed the HA400 it is really bad and loud. > When I use the front headphone jack its medium loud but still not right. It > can be heard on my transmitted audio. > > I tried using a battery to power the HA400 to isolate the ground but it has > no effect. I did the "Modification Improving the Immunity of the Rear-Panel > RS232 and Audio Connectors to RF" mod, and checked to be sure that the > "Front Panel Microphone Circuit" mod had been done at the factory. I tried > also using RG 174 for the audio feed. No change. I also removed the serial > cable and had no change. > > Any suggestions would be greatly appreciated as I do need to have four > headsets on the K3 for various ham demos. > > 72 and thanks, > Steve, W2MY > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.707 / Virus Database: 270.14.67/2506 - Release Date: 11/16/09 02:43:00 > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Don and Dick,
It does not occur with "TX Test" However, it is not any worse if I use my ALS600 at 400 Watts, or I totally disconnect the amp and just use 50 Watts out of the K3. I think it is RF related, but only run into this problem with the HA400. I do run 450 Ohm ladder line into my shack up to my link coupled tuner but just thought that it shouldn't happen to a proper design. If I run with the front panel audio volume to zero and use the front phones jack to the HA400 I get it bad if I plug the phones into the HA400 with the HA400 volume set to about a 3. I have the same problem with the line out. If I disconnect the audio "IN" into the HA400. I still get the buzz in the phoes when I talk. So it is RF getting into the HA400. I wonder if some bypass caps in the HA400 might help. Steve, W2MY Message----- From: Don Wilhelm [mailto:[hidden email]] Sent: Monday, November 16, 2009 4:33 PM To: Steven Pituch Cc: [hidden email] Subject: Re: [Elecraft] K3 & Beringer HA400 Steve, Just an idea - have you tried it on LINE OUT? It may be that you are overdriving the input of the Beringer. The other possibility is that you have an RF in the Shack problem and the Beringer is reacting to the RF. Try it when connected to a dummy load or in TX TEST. If that 'fixes' the problem, you have some antenna work to do to keep the stray RF out of the shack. 73, Don W3FPR Steven Pituch wrote: > Hi All, > I tried using these two items together and am getting scratchy audio in the > headphones when I speak on USB even though the monitor is set to zero. When > I use the rear headphones out to feed the HA400 it is really bad and loud. > When I use the front headphone jack its medium loud but still not right. It > can be heard on my transmitted audio. > > I tried using a battery to power the HA400 to isolate the ground but it has > no effect. I did the "Modification Improving the Immunity of the Rear-Panel > RS232 and Audio Connectors to RF" mod, and checked to be sure that the > "Front Panel Microphone Circuit" mod had been done at the factory. I tried > also using RG 174 for the audio feed. No change. I also removed the serial > cable and had no change. > > Any suggestions would be greatly appreciated as I do need to have four > headsets on the K3 for various ham demos. > > 72 and thanks, > Steve, W2MY > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.707 / Virus Database: 270.14.67/2506 - Release Date: 11/16/09 > > No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.707 / Virus Database: 270.14.67/2506 - Release Date: 11/16/09 01:43:00 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Steve,
Thanks for those details. I am almost certain Jim Brown K9YC would refer to this as a "pin 1" problem, and that is the reason that bypass caps are not likely to help. You might be able to minimize it with some work to the Beringer - look carefully at how the cable shields are routed. If they connect to the PC board directly, this is the classic pin 1 problem - they should be connected in such a way as to route the energy on the outside of the shield to the *outside* of the enclosure rather than going first to the PC Board ground plane.. Perhaps you can make some mods to that equipment, perhaps it is just not worth it. Many enclosures for inexpensive equipment are plastic, so there is no way to avoid the pin 1 problem in those cases. Once the RF energy gets inside the enclosure, there is no telling in which circuits it might cause problems. In the hamshack, metal enclosures for audio equipment is almost mandatory, and if designers would pay attention to the pin 1 situation, many user headaches would be solved. Note that in days of old, connectors used to mount on the enclosure, and thus prevented this pin 1 problem because the RF would flow on the outside of the enclosure and not make it to the inside, but in more modern times, connectors mount directly on the PC board and may or may not connect from the board ground plane to the enclosure - and even if it is connected to the enclosure, it is likely to be on the inside - RF travels on surfaces due to 'skin effect', so visualize the paths - the inside of a metal enclosure is a different conductor than the outside at RF frequencies - and you will see the difficulties presented. 73, Don W3FPR Steven Pituch wrote: > Don and Dick, > It does not occur with "TX Test" However, it is not any worse if I use my > ALS600 at 400 Watts, or I totally disconnect the amp and just use 50 Watts > out of the K3. > > I think it is RF related, but only run into this problem with the HA400. I > do run 450 Ohm ladder line into my shack up to my link coupled tuner but > just thought that it shouldn't happen to a proper design. > > If I run with the front panel audio volume to zero and use the front phones > jack to the HA400 I get it bad if I plug the phones into the HA400 with the > HA400 volume set to about a 3. > > I have the same problem with the line out. > > If I disconnect the audio "IN" into the HA400. I still get the buzz in the > phoes when I talk. So it is RF getting into the HA400. > > I wonder if some bypass caps in the HA400 might help. > > Steve, W2MY > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
Thank you Don,
The HA400 actually has a very nice metal case, but the pots are on the board and the plastic stems protrude out of holes. The mod to the case seems doable. Also I would think some rg8 shield used as a braid bolted to the case and going to the K3 might help. I didn't originally do this because a wanted something more portable. I also need to study K9YC's papers since I am not sure the Heil mic is wired to his standards. Thanks, I've got some stuff to try. It looks like a very nice affordable accessory. See: http://tinyurl.com/yftvksg 73, Steve, W2MY ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
«
Return to [K3]
|
1 view|%1 views
| Free forum by Nabble | Edit this page |