WA1GFZ SDR recording

[W2INR]

Recording of Frank, GFZ'z HPSDR.

Sounded good here into Syracuse.

3733 around 5:20pm

Recording made with the R390A in the 8kc position.

Digital recoding made with audacity of the diode.

G

[K1JJ]

Frank sounds pretty good  - just like Frank in person... :-)

We were talking a few weeks ago about how his old rig needed audio work - had hum and distortion.  But now, with this new set up, it sounds very clean and transparent.  Good job, OM.

That hi-tech rig shud last you a long time.  Looking forward to when you hook up the quad Mosfet linear to it.

T

[KA8WTK]

If you are listening Frank.....

He could be heard in Ohio, just a little on the weak side. I understand he was running low power (just 2 RF MOSFETs in final).

Bill KA8WTK

[Tom WA3KLR]

Frank,

How does that transmitter signal look on a spectrum analyzer?

[WA1GFZ]

hi Guys,
TNX for the reports. Check out HPSDR.org for pictures of each board and TX displays. We will have a chassis soon. I'm pushing for a second blank chassis with many supporting that will be used as a twin for the final. I'm running modified Flex software with 4 dB of compression and 10 band EQ with a suck out of mids. Mic is an EV664.
Future will be the afterburner slated to jump on the bench soon. The old 4X3 is calling to me. Also a SS afterburner with 16 MRF150s. I was only running about 25 watts today because there was only 30 volts on the final. At 48 volts I can do 50 watts or so. You will see spectrum plots that IMD off this thing is -50 dB third order so want a clean amp after it.
Thinking of an SDR set up. Hold off till this hits the market. Flex learned from our last set up to make the 5000. Once they eliminate the DDS and go A/D D/A it will be worth investing in.
If I was a software guy I would modify the code to put put the center frequency in 4 -4 bit words out the communication board parallel port to drive my Cubic pre post amplifier and have a strapping preselector. So far the only thing that crunches the RX is a big static crash. No signals at my QTH have crunched the RX. I can sometimes saturate the A/D in RX while in TX with relay leakage but that is about it.
There are a few more slots on the mother board. There is talk of a spectrum analyzer / Tracking generator and a VNA.
There are about 400 of these board sets around the world. Only a few guys are actually making QSOs so far. gfz

[kc2ifr]

Recorded using my WinRadio G313e at 15 KC bandwidth......

Bill