Elecraft

P3 with SVGA

Classic

List

Threaded

6 messages Options

Alan - G4GNX

P3 with SVGA

I just assembled the P3 kit which includes the SVGA adaptor and the TX monitor.

In the original instructions, there’s a warning not to use the P3 with SVGA adaptor, taking power from the K3’s 12 volt output. However, there’s a reference to the 1 Amp K3 modification in a later full manual for the P3, which says it’s OK to use the P3+SVGA, provided older K3s have the 1 Amp mod.

I’d prefer to use the power output from the K3, because it allows integrated switching of power to the P3. Am I correct in assuming that the later manual instructions are correct?

Also, I have the 6 metre (outboard) pre-amp which needs 12V power (very low current). As the K3 12V output is via an RCA (Phono) socket, has anyone used an RCA splitter to supply two devices?

73,

Alan. G4GNX

______________________________________________________________
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
Message delivered to [hidden email]

Don Wilhelm

Re: P3 with SVGA

Alan,

Look at the label on your K3 12 volt output jack. Does it say 0.5 amp
or does it say 1.0 amp? The 12v change includes a sticker to re-label
the jack.

Yes, you could use a "Y" adapter, but use a good quality one so you
don't have a significant voltage drop due to loosely fitting connectors.

73,
Don W3FPR

On 11/19/2017 6:49 AM, G4GNX wrote:
> I just assembled the P3 kit which includes the SVGA adaptor and the TX monitor.
>
> In the original instructions, there’s a warning not to use the P3 with SVGA adaptor, taking power from the K3’s 12 volt output. However, there’s a reference to the 1 Amp K3 modification in a later full manual for the P3, which says it’s OK to use the P3+SVGA, provided older K3s have the 1 Amp mod.
______________________________________________________________
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
Message delivered to [hidden email]

Alan - G4GNX

Re: P3 with SVGA

Hi Don.

Thanks for the info.

I performed the 1 Amp mod on my K3 myself, so I'm quite sure it's 1A capable
and yes it does have the 1A label.

I'll look for a quality adapter. As they're normally meant for audio work, I
was a little concerned that the internal wiring might only be intended to
carry milliamps.

73,

Alan. G4GNX

-----Original Message-----
From: Don Wilhelm
Sent: Sunday, November 19, 2017 12:04 PM
To: G4GNX ; Elecraft Reflector
Subject: Re: [Elecraft] P3 with SVGA

Alan,

Look at the label on your K3 12 volt output jack. Does it say 0.5 amp
or does it say 1.0 amp? The 12v change includes a sticker to re-label
the jack.

Yes, you could use a "Y" adapter, but use a good quality one so you
don't have a significant voltage drop due to loosely fitting connectors.

73,
Don W3FPR

On 11/19/2017 6:49 AM, G4GNX wrote:
> I just assembled the P3 kit which includes the SVGA adaptor and the TX
> monitor.
>
> In the original instructions, there’s a warning not to use the P3 with
> SVGA adaptor, taking power from the K3’s 12 volt output. However, there’s
> a reference to the 1 Amp K3 modification in a later full manual for the
> P3, which says it’s OK to use the P3+SVGA, provided older K3s have the 1
> Amp mod.

______________________________________________________________
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
Message delivered to [hidden email]

Michael Eberle

Re: P3 with SVGA

In reply to this post by Don Wilhelm

I use a "Y" adapter to power my P3 (no VGA) and W2 watt meter from the
K3 12V output. Before upgrading to the KXV3B, I used 2 "Y" adapters to
power the 6M pre-amp as well and never had any problems.

Mike, KI0HA

On 11/19/2017 06:15, G4GNX wrote:

> Hi Don.
>
> Thanks for the info.
>
> I performed the 1 Amp mod on my K3 myself, so I'm quite sure it's 1A
> capable and yes it does have the 1A label.
>
> I'll look for a quality adapter. As they're normally meant for audio
> work, I was a little concerned that the internal wiring might only be
> intended to carry milliamps.
>
> 73,
>
> Alan. G4GNX
>
> -----Original Message----- From: Don Wilhelm
> Sent: Sunday, November 19, 2017 12:04 PM
> To: G4GNX ; Elecraft Reflector
> Subject: Re: [Elecraft] P3 with SVGA
>
> Alan,
>
> Look at the label on your K3 12 volt output jack. Does it say 0.5 amp
> or does it say 1.0 amp? The 12v change includes a sticker to re-label
> the jack.
>
> Yes, you could use a "Y" adapter, but use a good quality one so you
> don't have a significant voltage drop due to loosely fitting connectors.
>
> 73,
> Don W3FPR
>
> On 11/19/2017 6:49 AM, G4GNX wrote:
>> I just assembled the P3 kit which includes the SVGA adaptor and the
>> TX monitor.
>>
>> In the original instructions, there’s a warning not to use the P3
>> with SVGA adaptor, taking power from the K3’s 12 volt output.
>> However, there’s a reference to the 1 Amp K3 modification in a later
>> full manual for the P3, which says it’s OK to use the P3+SVGA,
>> provided older K3s have the 1 Amp mod.
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

______________________________________________________________
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
Message delivered to [hidden email]

Ron Fial

K3 audio input went away.

In reply to this post by Alan - G4GNX

My K3 rear panel Mike input signal input suddenly went away. It had worked fine for several years. I key the PTT and speak but no indication of audio input. The K3 receives normally on main and sub rcvrs. It can transmit SSB fine using the stored audio buttons. Tune control works. Auto tuner works. Everything else is normal.

My K3 audio input is from a Plantronics mike to the Mic jack in the REAR panel. In the menu or config, rear panel Mic input is selected including the FET Bias. Front panel mike volume pot is set OK, usually at 12. The Plantronics Microphone tests fine on other equipment that has bias voltage, nice audio output at normal levels.

Before this happened, I was adjusting some other menu settings. I don't currently have a mike for the front panel, so can't test that input yet. (Need to order a new MH2 from Elecraft, no other Kenwood mike available at the moment.). I cannot figure out what I did to make the rear Mic audio input stop working. Think its unlikely a transistor or op-amp just decided to die. Suspect I accidentally changed something in the menu or config system. Before I start taking things apart and hook up the o'scope and spend gobs of time with the schematics, does anyone have any suggestions for what menu disaster I may have caused?

(I recall that Menu and Config has bitten me before)

73, Ron. KO7V

______________________________________________________________
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
Message delivered to [hidden email]

Nr4c

Re: K3 audio input went away.

Check the manual and verify mic settings in Menu. For an electret Mic you should see “rpl bias”. For dynamic prob “rph “.

Sent from my iPhone
...nr4c. bill

> On Nov 27, 2017, at 5:27 AM, Ron Fial <[hidden email]> wrote:
>
>
> My K3 rear panel Mike input signal input suddenly went away. It had worked fine for several years. I key the PTT and speak but no indication of audio input. The K3 receives normally on main and sub rcvrs. It can transmit SSB fine using the stored audio buttons. Tune control works. Auto tuner works. Everything else is normal.
>
> My K3 audio input is from a Plantronics mike to the Mic jack in the REAR panel. In the menu or config, rear panel Mic input is selected including the FET Bias. Front panel mike volume pot is set OK, usually at 12. The Plantronics Microphone tests fine on other equipment that has bias voltage, nice audio output at normal levels.
>
> Before this happened, I was adjusting some other menu settings. I don't currently have a mike for the front panel, so can't test that input yet. (Need to order a new MH2 from Elecraft, no other Kenwood mike available at the moment.). I cannot figure out what I did to make the rear Mic audio input stop working. Think its unlikely a transistor or op-amp just decided to die. Suspect I accidentally changed something in the menu or config system. Before I start taking things apart and hook up the o'scope and spend gobs of time with the schematics, does anyone have any suggestions for what menu disaster I may have caused?
>
> (I recall that Menu and Config has bitten me before)
>
> 73, Ron. KO7V
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]