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Preamps in K3s

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Jim AB3CV

Preamps in K3s

I'm confused a bit about how the Preamps in my K3s work.

When Preamp2 is engaged are the preamps stacked for a total of 30db
additional gain or does the Preamp2 engagement disengage Preamp1 for a
total of 20dB?

Or perhaps they are both engaged for a total of 20db with Pre2 boosting
over Pre1 by 10db?

73

jim ab3cv
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Bob McGraw - K4TAX

Re: Preamps in K3s

I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked.

Bob, K4TAX

Sent from my iPhone

> On Jun 10, 2017, at 9:48 AM, Jim Miller <[hidden email]> wrote:
>
> I'm confused a bit about how the Preamps in my K3s work.
>
> When Preamp2 is engaged are the preamps stacked for a total of 30db
> additional gain or does the Preamp2 engagement disengage Preamp1 for a
> total of 20dB?
>
> Or perhaps they are both engaged for a total of 20db with Pre2 boosting
> over Pre1 by 10db?
>
> 73
>
> jim ab3cv
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> This list hosted by: http://www.qsl.net
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>

Jim Miller

Re: Preamps in K3s

I likewise read all info in the K3s manual. Your interpretation is one that could be true but it isn't spelled out.

73

Jim ab3cv

On Jun 10, 2017, at 11:22 AM, Bob McGraw K4TAX <[hidden email]> wrote:

I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked.

Bob, K4TAX

Sent from my iPhone

donovanf

Re: Preamps in K3s

Hi Jim,

Fred Cady's excellent K3 Manual, 3rd edition, spells it out in detail in Table 7-3.

"The firmware prevents you from making these choices.
The hardware cannot handle a 30 dB preamplification."

73
Frank
W3LPL

----- Original Message -----

From: "Jim Miller" <[hidden email]>
To: "Bob McGraw K4TAX" <[hidden email]>
Cc: "Elecraft Reflector" <[hidden email]>
Sent: Saturday, June 10, 2017 3:31:09 PM
Subject: Re: [Elecraft] Preamps in K3s

I likewise read all info in the K3s manual. Your interpretation is one that could be true but it isn't spelled out.

73

Jim ab3cv

On Jun 10, 2017, at 11:22 AM, Bob McGraw K4TAX <[hidden email]> wrote:

I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked.

Bob, K4TAX

Sent from my iPhone

Cady, Fred-2

Re: Preamps in K3s

Thanks Frank.

Note that with K3 firmware 5.58 and above, preamp 2 is usable on 17-6 m.

cheers,

Fred KE7X

For all KE7X Elecraft books, see www.ke7x.com

________________________________
From: [hidden email] <[hidden email]> on behalf of [hidden email] <[hidden email]>
Sent: Saturday, June 10, 2017 10:13 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] Preamps in K3s

Hi Jim,

Fred Cady's excellent K3 Manual, 3rd edition, spells it out in detail in Table 7-3.

"The firmware prevents you from making these choices.
The hardware cannot handle a 30 dB preamplification."

73
Frank
W3LPL

----- Original Message -----

From: "Jim Miller" <[hidden email]>
To: "Bob McGraw K4TAX" <[hidden email]>
Cc: "Elecraft Reflector" <[hidden email]>
Sent: Saturday, June 10, 2017 3:31:09 PM
Subject: Re: [Elecraft] Preamps in K3s

I likewise read all info in the K3s manual. Your interpretation is one that could be true but it isn't spelled out.

73

Jim ab3cv

On Jun 10, 2017, at 11:22 AM, Bob McGraw K4TAX <[hidden email]> wrote:

I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked.

Bob, K4TAX

Sent from my iPhone

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Cady, Fred-2

Re: Preamps in K3s

Hi Brian,

You have to go to 17 and 15 meters and go into the CONFIG:PREAMP2 menu and turn it on for those bands.

Cheers,

Fred KE7X

________________________________
From: brian <[hidden email]>
Sent: Saturday, June 10, 2017 11:49 AM
To: Cady, Fred
Subject: Re: [Elecraft] Preamps in K3s

Fred,

Can't find 5.58 anywhere. After 5.57 comes 5.60 on the ELECRAFT
webpage. 5.6 doesn't access preamps on 15,17M here.

I know there was a pre-release version that had these bands but there
evidently were some small remaining problems to be fixed.

Installed 5.60 on my upgraded K3 (which has PREAMP2 on 10/6M working).
Preamp2 does not show up on 17, 15. It still does on 12-6M.

73 de Brian/K3KO

On 6/10/2017 16:57 PM, Cady, Fred wrote:

> Thanks Frank.
>
> Note that with K3 firmware 5.58 and above, preamp 2 is usable on 17-6 m.
>
> cheers,
>
> Fred KE7X
>
>
> For all KE7X Elecraft books, see www.ke7x.com<http://www.ke7x.com>
>
>
> ________________________________
> From: [hidden email] <[hidden email]> on behalf of [hidden email] <[hidden email]>
> Sent: Saturday, June 10, 2017 10:13 AM
> To: Elecraft Reflector
> Subject: Re: [Elecraft] Preamps in K3s
>
> Hi Jim,
>
>
> Fred Cady's excellent K3 Manual, 3rd edition, spells it out in detail in Table 7-3.
>
>
> "The firmware prevents you from making these choices.
> The hardware cannot handle a 30 dB preamplification."
>
>
> 73
> Frank
> W3LPL
>
>
>
>
> ----- Original Message -----
>
> From: "Jim Miller" <[hidden email]>
> To: "Bob McGraw K4TAX" <[hidden email]>
> Cc: "Elecraft Reflector" <[hidden email]>
> Sent: Saturday, June 10, 2017 3:31:09 PM
> Subject: Re: [Elecraft] Preamps in K3s
>
> I likewise read all info in the K3s manual. Your interpretation is one that could be true but it isn't spelled out.
>
> 73
>
> Jim ab3cv
>
> On Jun 10, 2017, at 11:22 AM, Bob McGraw K4TAX <[hidden email]> wrote:
>
> I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
>> On Jun 10, 2017, at 9:48 AM, Jim Miller <[hidden email]> wrote:
>>
>> I'm confused a bit about how the Preamps in my K3s work.
>>
>> When Preamp2 is engaged are the preamps stacked for a total of 30db
>> additional gain or does the Preamp2 engagement disengage Preamp1 for a
>> total of 20dB?
>>
>> Or perhaps they are both engaged for a total of 20db with Pre2 boosting
>> over Pre1 by 10db?
>>
>> 73
>>
>> jim ab3cv
>> ______________________________________________________________
>> 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]
>
> ______________________________________________________________
> 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]
>
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