[Elecraft] eHam.net forum message

[Geoffrey Mackenzie-Kennedy]

Thank you for posting K9OM's comment.

FWIW I have a Perseus and two other receivers which both use H-Mode mixers, 
one of which uses a version of PA3AKE's H-Mode front end.

With the Perseus used as a stand alone receiver, I have not experienced this 
"noise problem" in the presence of mild or quite strong static or manmade 
pulse QRN, UNLESS I wind up the Perseus' NR  too far, then indeed there is 
some tunnel/ reverberation effect, which can at times be annoying.

With the Perseus connected to the IF of either H-Mode receiver right after 
the first mixer, mainly for use as a panadapter, I very seldom use the 
Perseus' NR and then only at a low setting, and use the main receiver's LO 
noise blanker if required..

73,

Geoff
GM4ESD



On Wednesday, July 14, 2010 5:37 AM, RLVZ wrote:


> Dick Van Zandt (K9OM) has sent you a forum message for you to review.

<snip>

> ALL the above radios except the K2suffer from  the noisy front end problem 
> when mild QRN is around.  It sounds like these radios have a reverb unit 
> on the receiver which multiplies static and pulse noise.
>
> Elecraft claims to have  a cure for this problem, however I still find the 
> receiver noisy. The K2 I  prefer over the K3 on CW when there is  QRN 
> around. The filters on the K2 sound better on CW when there is QRN about.
>
> It amazes  me every time that I turn on any of my old old analog radios 
> like the TS830S or the FT1000D and do a comparison. The QRN all of a 
> sudden becomes tolerable and not so nerve wrecking.
>
> The TS830S is still my favorite low band radio for picking  weak signals 
> out of QRN on  160 and 80 meters. This is especially so when there is a 
> lot static and QRN around.
>
> Its unfortunate that there is no current model  analog transceiver 
> manufactured that has  fantastic receiver  dynamic range numbers like the 
> Elecraft K3. The only option available is  to build  your own like the 
> PA3AKE H-mode mixer high performance receiver.
>
> http://www.xs4all.nl/~martein/pa3ake/hmode/