K1 receiver problems update

[Michael Moody]

Hi All,

Please ignore the bit about the faint data noise in my previous post.
It was my WIFI router. I guess I'll have to live without internet now.
:)

However the "no receive" problem still remains. I think I may have
damaged the Q10 2N7000 in the rf preamp/mute circuit. I found another
owner on the web with the same problem. He stated that he removed the
Q10 and the problem went away, and then replaced it with a new 2N7000.

-can I remove the Q10 and leave the space blank for testing?

-if I do need to replace it, what is the proper one to get? Digikey
lists a lot of 2n7000 with varying specs.

Thanks for your help,

Mike
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[Don Wilhelm-4]

Mike,

Yes, the 2N7000 FET is sensitive to static, and could have been damaged
when it was installed.
The receive path will work fine with Q10 removed.  If that restores your
K1 to full receive, then replacement is in order.

The specs on the 2N7000 at DigiKey are all the same from my perspective
- the manufacturers may be different, and the packaging (tape, reel,
bulk, etc) are different, but the component is the same.

73,
Don W3FPR

On 12/24/2011 5:49 PM, Michael Moody wrote:

> However the "no receive" problem still remains. I think I may have
> damaged the Q10 2N7000 in the rf preamp/mute circuit. I found another
> owner on the web with the same problem. He stated that he removed the
> Q10 and the problem went away, and then replaced it with a new 2N7000.
>
> -can I remove the Q10 and leave the space blank for testing?
>
> -if I do need to replace it, what is the proper one to get? Digikey
> lists a lot of 2n7000 with varying specs.
>
> Thanks for your help,
>
>

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[rhblake]

------Original Message------
From: Don Wilhelm
Sender: [hidden email]
To: Michael Moody
Cc: [hidden email]
ReplyTo: [hidden email]
Subject: Re: [Elecraft] K1 receiver problems update
Sent: Dec 24, 2011 6:00 PM

Mike,

Yes, the 2N7000 FET is sensitive to static, and could have been damaged
when it was installed.
The receive path will work fine with Q10 removed.  If that restores your
K1 to full receive, then replacement is in order.

The specs on the 2N7000 at DigiKey are all the same from my perspective
- the manufacturers may be different, and the packaging (tape, reel,
bulk, etc) are different, but the component is the same.

73,
Don W3FPR

On 12/24/2011 5:49 PM, Michael Moody wrote:

> However the "no receive" problem still remains. I think I may have
> damaged the Q10 2N7000 in the rf preamp/mute circuit. I found another
> owner on the web with the same problem. He stated that he removed the
> Q10 and the problem went away, and then replaced it with a new 2N7000.
>
> -can I remove the Q10 and leave the space blank for testing?
>
> -if I do need to replace it, what is the proper one to get? Digikey
> lists a lot of 2n7000 with varying specs.
>
> Thanks for your help,
>
>

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Sent on the Now Network™ from my Sprint® BlackBerry
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