K3--Strange Issue On 40 SSB
Locked
 
|
Hi All,
I suspect when some read this they will think I am daft. But I will mention it anyway. Here's the problem. And it only seems to happen on 40 meter SSB. Sometimes, but not always, when I try to transmit on the SSB portion of 40, I will not see any consistent power output on my meter. It is erratic, and for the most part seems to be nil, but with short high peaks. On other bands, when I modulate I see a nice consistent meter reading that matches my voice modulating the radio. Just what you would expect. On 40, my antenna is actually set for the lower part of the band, but my ATU seems to have no problem showing me a 1:1 match in the SSB part of the band. Now for the strange part, which I just discovered. If I switch to CW, but at that higher band location, and key the transmitter briefly (which then shows normal power output), I can then return to SSB mode and my modulation per the meter looks normal! I've changed no other settings in the meantime. I have not retuned either. It's as if giving a short CW burst first unlocks the transmitter for SSB. Anybody have any idea what is happening? Dave W7AQK _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
something to do with the filter you selected for SSB perhaps?
just guessing -- We are not the same persons this year as last; nor are those we love. It is a happy chance if we, changing, continue to love a changed person. - William Somerset Maugham, writer (1874-1965) On 14 Mar 2008, at 13:51, T. David Yarnes wrote: > Hi All, > > I suspect when some read this they will think I am daft. > But I will mention it anyway. Here's the problem. And it > only seems to happen on 40 meter SSB. Sometimes, but not > always, when I try to transmit on the SSB portion of 40, I > will not see any consistent power output on my meter. It is > erratic, and for the most part seems to be nil, but with > short high peaks. On other bands, when I modulate I see a > nice consistent meter reading that matches my voice > modulating the radio. Just what you would expect. On 40, > my antenna is actually set for the lower part of the band, > but my ATU seems to have no problem showing me a 1:1 match > in the SSB part of the band. Now for the strange part, > which I just discovered. If I switch to CW, but at that > higher band location, and key the transmitter briefly (which > then shows normal power output), I can then return to SSB > mode and my modulation per the meter looks normal! I've > changed no other settings in the meantime. I have not > retuned either. It's as if giving a short CW burst first > unlocks the transmitter for SSB. > > Anybody have any idea what is happening? > > Dave W7AQK > > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
In reply to this post by w7aqk
Hi Dave,
I also don't know what is going on, but I have noticed somewhat similar behavior with my K3 as well. I've seen it with the 1mW transverter output using MCU 1.69 + DSP 1.53, as well as on short wave with MCU 1.75 + DSP 1.57. I did not see a connection to just the 40m band being affected. On short wave the problem appears to be much worse at roughly 30W than at the 100W level. If you have more information, you should report it to Elecraft's K3 support address, imho. vy 73 de toby _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
In reply to this post by w7aqk
Dave,
This is a bug that was just recently found. We're in the process of testing updated firmware to fix this. ------------------------- 73, Greg - AB7R Whidbey Island WA NA-065 K3#0009 and 0319 On Fri Mar 14 6:51 , "T. David Yarnes" sent: >Hi All, > >I suspect when some read this they will think I am daft. >But I will mention it anyway. Here's the problem. And it >only seems to happen on 40 meter SSB. Sometimes, but not >always, when I try to transmit on the SSB portion of 40, I >will not see any consistent power output on my meter. It is >erratic, and for the most part seems to be nil, but with >short high peaks. On other bands, when I modulate I see a >nice consistent meter reading that matches my voice >modulating the radio. Just what you would expect. On 40, >my antenna is actually set for the lower part of the band, >but my ATU seems to have no problem showing me a 1:1 match >in the SSB part of the band. Now for the strange part, >which I just discovered. If I switch to CW, but at that >higher band location, and key the transmitter briefly (which >then shows normal power output), I can then return to SSB >mode and my modulation per the meter looks normal! I've >changed no other settings in the meantime. I have not >retuned either. It's as if giving a short CW burst first >unlocks the transmitter for SSB. > >Anybody have any idea what is happening? > >Dave W7AQK > > >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
Aha! Thanks Greg. I was feeling like perhaps I was
screwing up something in my setup. Glad to hear that it's probably just one of those quirky problems that crops up, but will be addressed. You made my day! Dave ----- Original Message ----- From: "Greg - AB7R" <[hidden email]> To: <[hidden email]>; "'T . David Yarnes'" <[hidden email]> Sent: Friday, March 14, 2008 7:32 AM Subject: Re: [Elecraft] K3--Strange Issue On 40 SSB Dave, This is a bug that was just recently found. We're in the process of testing updated firmware to fix this. ------------------------- 73, Greg - AB7R Whidbey Island WA NA-065 K3#0009 and 0319 On Fri Mar 14 6:51 , "T. David Yarnes" sent: >Hi All, > >I suspect when some read this they will think I am daft. >But I will mention it anyway. Here's the problem. And it >only seems to happen on 40 meter SSB. Sometimes, but not >always, when I try to transmit on the SSB portion of 40, I >will not see any consistent power output on my meter. It >is >erratic, and for the most part seems to be nil, but with >short high peaks. On other bands, when I modulate I see a >nice consistent meter reading that matches my voice >modulating the radio. Just what you would expect. On 40, >my antenna is actually set for the lower part of the band, >but my ATU seems to have no problem showing me a 1:1 match >in the SSB part of the band. Now for the strange part, >which I just discovered. If I switch to CW, but at that >higher band location, and key the transmitter briefly >(which >then shows normal power output), I can then return to SSB >mode and my modulation per the meter looks normal! I've >changed no other settings in the meantime. I have not >retuned either. It's as if giving a short CW burst first >unlocks the transmitter for SSB. > >Anybody have any idea what is happening? > >Dave W7AQK > > >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |