Elecraft

K2-100 --> SB-200

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john-477

K2-100 --> SB-200

Anyone using this setup?

I'm considering connecting my SB200 in this fashion (Yes, I have a keying
interface!) and wonder how these two play together.

73
John K5MO

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Don Ehrlich-2

Re: K2-100 --> SB-200

I am using an SB200 with my K2/100. Works fine.

The SB200 send/receive relay presents a *negative* 150 volts or so to the
relay jack on the rear of the linear and therefore
CAN NOT be operated by the K2 interface directly. I use an external relay
as an interface between the K2 control line
and the send/receive jack on the SB200.

Don K7FJ

> Anyone using this setup?
>
> I'm considering connecting my SB200 in this fashion (Yes, I have a keying
> interface!) and wonder how these two play together.
>
> 73
> John K5MO
>
>
>

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Steven Pituch

Fan for Speaker in EC2?

Hi all,
I was looking at my KPA100 while waiting for some parts and am
wondering..... Since the KPA100 is in the EC2 case, I'm guessing there
is no reason to put the speaker in the EC2 by screwing it to the
heatsink of the KPA100.

What if I found a small fan and placed it where the speaker should be to
compliment the small fan at the back of the kpa100? With the opening in
the heat sink it seems a perfect substitution. Any suggestions?

Steve, W2MY
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JEAN-FRANCOIS MENARD-3

Re: Fan for Speaker in EC2?

Very good idea !!! I have the KPA100 in EC-2 too. Would like to hear
from people about that good idea.... ;-)

Le 05-07-05 à 20:26, Steven Pituch a écrit :

> Hi all,
> I was looking at my KPA100 while waiting for some parts and am
> wondering..... Since the KPA100 is in the EC2 case, I'm guessing
> there is no reason to put the speaker in the EC2 by screwing it to
> the heatsink of the KPA100.
>
> What if I found a small fan and placed it where the speaker should
> be to compliment the small fan at the back of the kpa100? With the
> opening in the heat sink it seems a perfect substitution. Any
> suggestions?
>
> Steve, W2MY
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

======

Jean-François Ménard / VA2VYZ

======

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Tim Logan

Re: Fan for Speaker in EC2?

In reply to this post by Steven Pituch

EXcellent thought!
Steven Pituch wrote:

> Hi all,
> I was looking at my KPA100 while waiting for some parts and am
> wondering..... Since the KPA100 is in the EC2 case, I'm guessing there
> is no reason to put the speaker in the EC2 by screwing it to the
> heatsink of the KPA100.
>
> What if I found a small fan and placed it where the speaker should be
> to compliment the small fan at the back of the kpa100? With the
> opening in the heat sink it seems a perfect substitution. Any
> suggestions?
>
> Steve, W2MY
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

Steven Pituch

Re: Fan for Speaker in EC2?

In reply to this post by Steven Pituch

Hi all,

I will probably be looking for a small fan for where the speaker
normally goes in my spare time. I can always use an external fan for
now. I also want to test the kpa100 with the existing fan. In any
event, I didn't want to imply that the existing Elecraft design is
deficient.

Issues would be:
1) How to hook it up? I was thinking of paralleling it with the
existing fan, so they would go on and off as needed.

2) Fan direction: I would think it best to have this fan to be in the
opposite direction of the original fan. If the original fan blows, then
this one should suck, so as to not fight each other.

3) Also omitting the speaker and adding a fan or not, will change the
ventilation paths in the EC2. It could actually create a problem with
cooling a specific area of the enclosure.

4) If I attach the 2nd fan to the first in parallel then can the supply
take the extra current?

5) Even if I don't add the 2nd fan, it may be good to install the
non-connected speaker to properly seal the enclosure to allow cooling as
originally intended.

Food for thought,
Steve, W2MY

Steven Pituch wrote: