Turning off Amp PTT when using Tune Button
Locked
Turning off Amp PTT when using Tune Button
 
|
Is there a way to turn off the ptt signal to an amp when the TUNE button
is pushed? I want to run high power but I want to disable the amp while tuning an external antenna tuner. Thanks Rich - N5ZC ______________________________________________________________ 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 |
Re: Turning off Amp PTT when using Tune Button
|
|
I think the only way is to use an external switch in the amplifier
keying line, or switching the amplifier to standby. 73 Dave, G4AON K3/100 #80, Acom 1000 --------------------------------- Is there a way to turn off the ptt signal to an amp when the TUNE button is pushed? I want to run high power but I want to disable the amp while tuning an external antenna tuner. Thanks Rich - N5ZC ______________________________________________________________ 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 Richard Thorne
Yeah, called turning amp to standby. In my case anyway, standby switch is
right in front of my face. I've gotten into habit of turning amp to standby when I change bands and only putting it back on when I've seen normal SWR on K3 in tune, and I've changed amp tuning knobs to numbers for the new band. WAY easier on expensive amp tubes. Personally I wouldn't want the function you imply in the K3, certainly not as a default behavior. I'd bet that generates a whole new string of <Why can't I key my amp with my K3?> threads. 73, Guy On Sun, Jul 12, 2009 at 11:00 AM, Richard Thorne <[hidden email]>wrote: > Is there a way to turn off the ptt signal to an amp when the TUNE button > is pushed? > > I want to run high power but I want to disable the amp while tuning an > external antenna tuner. > > Thanks > > Rich - N5ZC > ______________________________________________________________ > 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 > -- 73, Guy K2AV ______________________________________________________________ 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 |
Re: Turning off Amp PTT when using Tune Button
|
|
In reply to this post by Richard Thorne
Hi,
Yes. On my Acom 1000 there is a button marked OPER, press it to go off-line, press it again to on-line. I bet many other amps have something similar. Regards, Mike VP8NO ----- Original Message ----- From: "Richard Thorne" <[hidden email]> To: "Elecraft" <[hidden email]> Sent: Sunday, July 12, 2009 11:00 AM Subject: [Elecraft] Turning off Amp PTT when using Tune Button | Is there a way to turn off the ptt signal to an amp when the TUNE button | is pushed? | | I want to run high power but I want to disable the amp while tuning an | external antenna tuner. | | Thanks | | Rich - N5ZC ______________________________________________________________ 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 |
Re: Turning off Amp PTT when using Tune Button
|
|
In reply to this post by Richard Thorne
Rich . . .
Can't comment about other amps, but running the K3 barefoot (or tuning an external ATU) with the Yaesu Quadra merely requires toggling the Quadra's OPERATE switch off. Toggle it back on to use the amp. 73, Kent K9ZTV Richard Thorne wrote: > Is there a way to turn off the ptt signal to an amp when the TUNE button > is pushed? > > I want to run high power but I want to disable the amp while tuning an > external antenna tuner. ______________________________________________________________ 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 |
Re: Turning off Amp PTT when using Tune Button
|
|
Kent et All:
Yes thats the easy and simple way. What I was hoping for was quick band changes without the need for flipping switches. I'll be running an SG-500 amp and already planned on placing a switch in the ptt line to disable the amp. Rich - N5ZC K9ZTV wrote: > Rich . . . > > Can't comment about other amps, but running the K3 barefoot (or tuning > an external ATU) with the Yaesu Quadra merely requires toggling the > Quadra's OPERATE switch off. Toggle it back on to use the amp. > > 73, > > Kent K9ZTV > > > Richard Thorne wrote: >> Is there a way to turn off the ptt signal to an amp when the TUNE button >> is pushed? >> >> I want to run high power but I want to disable the amp while tuning an >> external antenna tuner. > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.375 / Virus Database: 270.13.12/2233 - Release Date: 07/12/09 08:20:00 > > 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 |
|
On Sun, 12 Jul 2009 18:28:43 -0500, Richard Thorne
<[hidden email]> wrote: >Kent et All: > >Yes thats the easy and simple way. > >What I was hoping for was quick band changes without the need for >flipping switches. I'll be running an SG-500 amp and already planned on >placing a switch in the ptt line to disable the amp. > >Rich - N5ZC > That's very interesting. I've never seen an Amateur Radio Amplifier without a standby switch. Are you saying that yours doesn't have one? Tom, N5GE [hidden email] K3 #806, K3 #1055 XV144, XV432, KRC2 W1 and other small kits. http://www.n5ge.com ______________________________________________________________ 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
Amateur Radio Operator N5GE
|
Re: Turning off Amp PTT when using Tune Button
|
|
>>
> [snip] > > That's very interesting. I've never seen an Amateur Radio Amplifier > without a standby switch. Are you saying that yours doesn't have one? You don't really need one so much for an SS amp. And many amps with "instant on" tubes -- like the 3-500Z and others didn't have one -- SB-200/220 for example. Grant/NQ5T ______________________________________________________________ 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 Richard Thorne
When you buy the SG-500 amp, be sure to also buy the "remote on/off switch".
This remote is also your BAND SELECT switch which also has an AUTO settings. If SGC would post a picture and description of it, I am sure they'd sell more of them. Considering the work it took to design and build it, I think the switch is worth the money. The best price is probably at R&L electronics. Now, you know, sooner or later you are going to forget to switch the amplifier off before tuning. Your auto-tuner will then fry when trying to tune with 500 to 700 watts going through it. (Yes the SGC 500 can develop over 700 watts - depending on the band in use) The Palstar AT-AUTO tuner has a PTT input and PTT output - it keeps the amplifier off both when tuning and also whenever the SWR is below the threshhold you designate (typically somewhere between 1.5 and 2.0). The Palstar is also rated for 1500 watts - any mode. It's expensive, but it gets you a perfect SWR - unless your antenna really can't do it. All the relay operated auto tuners are a compromise - they are not capable of adding/removing small enough amounts of inductance or capacitance for a truely perfect tune - though the relay auto tuners can be lightning fast. I think all the amps have self protection from high SWR. You should have some kind of PTT automatic cutoff to protect the tuner from high SWR while tuning. I think only Palstar and SGC auto tuners have this protection feature. Howard
|
Re: Turning off Amp PTT when using Tune Button
|
|
Thanks Howard:
Excellent information, you know what I'm trying to accomplish. I'm aware of those tuners and thats why I thought it may be nice to have the ptt automatically disabled within the rig. There are less expensive high power tuners that don't have the features the SG-500 or Palstar has. MFJ has one also and is the least expensive of the 3. Any tuner I would use would be installed at the base of the tuner and would need to be protected from the wx. Rich - N5ZC HowardZ wrote: > When you buy the SG-500 amp, be sure to also buy the "remote on/off switch". > This remote is also your BAND SELECT switch which also has an AUTO settings. > If SGC would post a picture and description of it, I am sure they'd sell > more of them. > Considering the work it took to design and build it, I think the switch is > worth the money. > The best price is probably at R&L electronics. > > Now, you know, sooner or later you are going to forget to switch the > amplifier off before tuning. > Your auto-tuner will then fry when trying to tune with 500 to 700 watts > going through it. > (Yes the SGC 500 can develop over 700 watts - depending on the band in use) > The Palstar AT-AUTO tuner has a PTT input and PTT output - it keeps the > amplifier off both when tuning and also whenever the SWR is below the > threshhold you designate (typically somewhere between 1.5 and 2.0). The > Palstar is also rated for 1500 watts - any mode. It's expensive, but it > gets you a perfect SWR - unless your antenna really can't do it. All the > relay operated auto tuners are a compromise - they are not capable of > adding/removing small enough amounts of inductance or capacitance for a > truely perfect tune - though the relay auto tuners can be lightning fast. > > I think all the amps have self protection from high SWR. > You should have some kind of PTT automatic cutoff to protect the tuner from > high SWR while tuning. > I think only Palstar and SGC auto tuners have this protection feature. > > Howard > > > Richard Thorne wrote: > >> Kent et All: >> >> Yes thats the easy and simple way. >> >> What I was hoping for was quick band changes without the need for >> flipping switches. I'll be running an SG-500 amp and already planned on >> placing a switch in the ptt line to disable the amp. >> >> Rich - N5ZC >> >> K9ZTV wrote: >> >>> Rich . . . >>> >>> Can't comment about other amps, but running the K3 barefoot (or tuning >>> an external ATU) with the Yaesu Quadra merely requires toggling the >>> Quadra's OPERATE switch off. Toggle it back on to use the amp. >>> >>> 73, >>> >>> Kent K9ZTV >>> >>> >>> Richard Thorne wrote: >>> >>>> Is there a way to turn off the ptt signal to an amp when the TUNE button >>>> is pushed? >>>> >>>> I want to run high power but I want to disable the amp while tuning an >>>> external antenna tuner. >>>> >>> ------------------------------------------------------------------------ >>> >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com >>> Version: 8.5.375 / Virus Database: 270.13.12/2233 - Release Date: >>> 07/12/09 08:20:00 >>> >>> >>> >> ______________________________________________________________ >> 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 >> >> >> > > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.375 / Virus Database: 270.13.14/2238 - Release Date: 07/14/09 18:03:00 > > 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 |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |