[Elecraft] Re: k2/100 topband operation

Tue Dec 16 20:25:01 2003

I use the preamp on my K9AY loop probably 50% of the time with my K2/100.
To keep from smoking the front end, I use one of KD9SV's "front-end saver"
boxes.  One of the best investments I've made, it grounds the RX input on
TX.  Not affiliated, of course.

 73,
Blake N4GI

----- Original Message -----
From: "BarryG" <[email protected]>
To: <[email protected]>
Sent: Tuesday, December 16, 2003 7:18 PM
Subject: Re: [Elecraft] Re: k2/100 topband operation

>
> I guess I should have specified a coax-fed Beverage with matching xfmr
instead of "straight into".  I'm asking if folks are using external preamps
on their low gain receive antennas, such as Beverages.  So far two
respondents have indicated in the affirmative.  Back-to-back diode
protection is a good idea Hank!
>
> Thanks & 73,
> Barry N1EU
>
>
>
> --- On Tue 12/16, Hank Kohl K8DD < [email protected] > wrote:From: Hank Kohl
K8DD [mailto: [email protected]]To: [email protected]: Tue, 16 Dec 2003
14:31:59 -0500Subject: Re: [Elecraft] Re: k2/100 topband operationAt
12/16/2003 08:22 AM, you wrote:
>
>
> >Topband related question: are K2 users running an unamplified Beverage
> >straight into their K2's rx ant jack? I tried a K2 about two years ago
> >and the rf/if gain coupled with the AGC threshold was insufficient for
the
> >straight-in Beverage. If I cranked the gain to hear weaker signals on the
> >Beverage, I would blow out my eardrums if a strong signal came on
> >frequency. Was wondering if this issue has been addressed in the
> >intervening time period?
> >
> >Thanks & 73,
> >Barry N1EU
>
> Normally a beverage doesn't need a preamp, but run a beverage straight
into
> the K2? No, I wouldn't do that. An unmatched beverage would be down
> another 10 or so db. It should have a 9:1 transformer at the feedpoint and
> run CATV coax into the shack. Then you probably would not need a
> preamp. I would put a pair of 1N34A's from the beverage feed to ground
> (one pointing each way) to take any RF off the RX antenna.
>
>
> _______________________________________________
> No banners. No pop-ups. No kidding.
> Introducing My Way - http://www.myway.com
> _______________________________________________
> Elecraft mailing list: [email protected]
> You must be subscribed to post to the list.
> To subscribe or unsubscribe see:
http://mailman.qth.net/mailman/listinfo/elecraft
> Elecraft Web Page: http://www.elecraft.com
> Also see: http://www.elecraft.com/elecraft_list_guidelines.htm