[hpsdr] Mercury and 28Mhz receive

[Helmut Oeller]

Hi Mike,

 

I can confirm the same ,phenomenon', using mercury_eu (V6.4) and Joe's
1.9.3.4 diversity20 (10AUG2011).

 

73 Helmut, DC6NY

Von: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Mike Stevenson
Gesendet: Montag, 26. September 2011 11:25
An: hpsdr at lists.openhpsdr.org
Betreff: [hpsdr] Mercury and 28Mhz receive

 

I have been spending quite a lot of time operating on  

10m now is open again.

There has always been a higher level of spurious signals on this band than
any other even with Mercury input terminated directly in 50 ohms.

 

What I am now seeing  using Doug's, W5WC software with zero frequency IF is
between about 28.300 and 28.650 a spurious signal at 0Hz in the receive pass
band.

Also I am hearing what sounds like intermod produced by other signals in the
display pass band producing an audible output. I have see the effect produce
by signal of only S7. Also at the same time I see the 0Hz spurious being
modulated by the off frequency S7 signal.

The above applies to Doug's software 1.19.3.4, 1.19.3.5 and 2.2.3.

 

Using Bill's KD5TFD software with 9Khz IF I see much the same spurious on
the spectrum display but 0Hz spurious is offset by 9Khz and so far have not
detected any unwanted products in the audio output.

 

Current cards

Mercury  V2.9

Pennylane  V1.4

Metis   V1.4

Excalibur

Alex

 

Has anyone else seen this or do I have a one off problem.

 

Mike G8ALS

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