Please keep these items in mind as you read the rest of my description.
1. The softrock board will successfully receive PSK31 using the built-
in sound card in my PC. I am using Rocky 3.2.
2. I can receive PSK31 using my Elecraft K2 w/a homebrew interface to
the Delta 44 sound card.
3. I do not receive PSK31 when I connect the Softrock to the Delta 44.
When I first completed the Softrock, I had the same situation as
above. After reading many of the postings regarding the infamous spike
and images I decided to order the Delta 44 interface card in order to
take advantage of its filtering and ground loop solution. I built it
today and installed it. The results are still as above.
I did notice that the PC sound card shows the spike. The Delta 44 had
a significant hump at 14050 and 2 images but they virtually
disappeared after installation of the interface (not as clean as some
files I have seen posted here).
I also found that when using the Delta 44 GUI (which I find very
confusing) I could vary the H/W In 1/2 faders over their full range
and it appeared to have no effect on the Rocky display. However, when
using the same H/W In 1 fader (I only need one for the K2 interface),
I can change the signal level significantly. BTW I am using Ham Radio
Deluxe for the K2 PSK31 display.
I also could observe other signals (I presume RTTY or CW) on Rocky but
could never decode a PSK31 signal when using the Delta 44.
Is there another setting in Rocky unique to PSK31 (I did double-check
to be sure that I have PSK31 selected). Why doesn't the fader change
the level of the signal?
What is going on here?????
Thanks for any help.
73, Jim WA4YWM