Elecraft › [K3]

[K3] Gain to KXV3 wideband IF output

Classic

List

Threaded

4 messages Options

G4BVY

[K3] Gain to KXV3 wideband IF output

I've finally completed my Soft Rock for use as a pan adapter. However it is
rather deaf.

On investigation, my measured "gain" from the K3 antenna input to the KXV3
IF output (terminated in 50 ohms) is -20dB. Looking at the K3 block/circuit
diagrams, this would appear to be on the low side. Is this typical or do I
need to conduct an internal examination.

{Note I have not done any of the mods to increase the gain}.

Roger - G4BVY

______________________________________________________________
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

Jack Smith-6

Re: [K3] Gain to KXV3 wideband IF output

-18 dB transfer loss is typical of what I measure.

Solution involves making the mods to the FET follower and in most cases
adding amplification between the IF output port and the Soft Rock input.

Jack K8ZOA

On 6/26/2012 9:25 AM, Roger Dixon wrote:

> I've finally completed my Soft Rock for use as a pan adapter. However it is
> rather deaf.
>
>
>
> On investigation, my measured "gain" from the K3 antenna input to the KXV3
> IF output (terminated in 50 ohms) is -20dB. Looking at the K3 block/circuit
> diagrams, this would appear to be on the low side. Is this typical or do I
> need to conduct an internal examination.
>
> {Note I have not done any of the mods to increase the gain}.
>
>
>
> Roger - G4BVY
>
> ______________________________________________________________
> 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
>

G4BVY

Re: [K3] Gain to KXV3 wideband IF output

Thanks Jack,
I was beginning to suspect the FET but you have put my mind at rest on that
one.

Roger - G4BVY

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Jack Smith
Sent: 26 June 2012 15:02
To: [hidden email]
Subject: Re: [Elecraft] [K3] Gain to KXV3 wideband IF output

-18 dB transfer loss is typical of what I measure.

Solution involves making the mods to the FET follower and in most cases
adding amplification between the IF output port and the Soft Rock input.

Jack K8ZOA

On 6/26/2012 9:25 AM, Roger Dixon wrote:
> I've finally completed my Soft Rock for use as a pan adapter. However it
is
> rather deaf.
>
>
>
> On investigation, my measured "gain" from the K3 antenna input to the KXV3
> IF output (terminated in 50 ohms) is -20dB. Looking at the K3
block/circuit
> diagrams, this would appear to be on the low side. Is this typical or do
I

> need to conduct an internal examination.
>
> {Note I have not done any of the mods to increase the gain}.
>
>
>
> Roger - G4BVY
>
> ______________________________________________________________
> 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

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2177 / Virus Database: 2437/5093 - Release Date: 06/25/12

______________________________________________________________
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

Phillip Lontz

Just Placed my order for the KX3

In reply to this post by G4BVY

Oh Boy... Oh Boy... Oh Boy... can't wait.

They said 90 days or so... just in time for a trip to Turkey.

Phil
Santa Fe, NM
______________________________________________________________
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