[Premium-Rx] Ten-Tec RX-340 ??

[Clemens Paul]

Don,

contrary to the IC756proxx the IC-7800 can activate its preamp below 1,7 Mhz.
This results in a MDS of -123dBm or a noise figute of 17dB.
This is *very well* (about 10dB) below athmospheric noise on MW/LW during night.
So If your other receivers performed really better than the Icom on MW this isn't definitely
a sensitivity issue.
My personal experience with my 7800 and Telefunken E1800,which is even more sensitive below
1,7 MHz:
When receiving extremely weak ham cw signals on 137Khz *during daylight* (groundwave 
propagation)
the E1800 gave a little better readibility due to its better sensitivity.

73
Clemens
  ----- Original Message ----- 
  From: AC7ZG
  To: Aidehua at aol.com ; premium-rx at ml.skirrow.org
  Sent: Sunday, September 04, 2005 1:26 AM
  Subject: RE: [Premium-Rx] Ten-Tec RX-340 ??


  My icom7800 does not hold a candle to the wj8712p/wj8711a/hf1000a for TP medium wave dxing, 
nor weak signal recovery on the shortwave bands.
  I don't usually bring it with me to the coast of Washington for this reason. Like the 
ICOM756pro2 and 3, the 7800 has an attenuator in circuit below 1700kHz to prevent overload by AM 
stations. Guy Atkins has made some circuit changes to his pro3 to bring it into play as a weak 
signal MW receiver, including removing the attenuation circuit and replacing the roofing filter 
with one of the 6kHz versions from the 7800. (I've not similarly butchered my 7800 :-0

  Don
  AC7ZG

  PS I've used one of my wj8711A's for receive (disabled during transmit) along with the 7800 to 
do some very weak signal ham radio qsos -- the 7800 could not keep up...
    -----Original Message-----
    From: premium-rx-bounces at ml.skirrow.org [mailto:premium-rx-bounces at ml.skirrow.org]On Behalf 
Of Aidehua at aol.com
    Sent: Saturday, September 03, 2005 1:02 PM
    To: premium-rx at ml.skirrow.org
    Subject: Re: [Premium-Rx] Ten-Tec RX-340 ??


    Gosh, I love this group!!  And here I was, feeling guilty for owning a retirement's worth of 
receivers....I have never compared the HF-1000A with the 340, but have done so with my Icom 
7800.  The 7800 is comparable on MW but the SAM on the WJ does supremely well and gives a 
fullness the 7800 cannot hold a candle to.

    I also agree the a retored/tweaked R390A (my EAC) really does a superior job on MW and the 
Tropical Bands.  For a serious night of DX listening, I always keep the R390 fired up, 
especially since it's my last resort for specific targeting of stations (i.e., Africa on 60m).

    Just wanted to chime in on how refreshing the group is here, considering not too many hams 
appreciate this aspect of high end receivers.

    73,
    Ed NI6S


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