[hpsdr] Presentation slides

[Helmut Oeller]

Hi Mike,

Brilliant job, congratulations!

73, Helmut, DC6NY

-----Ursprüngliche Nachricht-----
Von: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Mike Seguin
Gesendet: Freitag, 25. April 2014 00:27
An: apache-labs at yahoogroups.com; hpsdr at lists.openhpsdr.org
Betreff: [hpsdr] Presentation slides

***** High Performance Software Defined Radio Discussion List *****

I gave a presentation on Pure Signal at the Eastern VHF/UHF Conference a 
couple of weeks back. I thought I'd share the slides. It was based on 
the work I did on 6M with the kW LDMOS amplifier. It covers both the amp 
running Class AB and Class B.

PDF of the slides is here: (watch any wrap)

http://users.burlingtontelecom.net/~n1jez@burlingtontelecom.net/images/Easte
rn_VHF_UHF_Conf_2014.pdf

I should note that the IMD numbers on the slides are delta readings 
between the two tone level and the worst case IMD3/5 products. To 
compare apples and apples with say the ARRL, you need to subtract 6 dB. 
So if you see a measurement of -54 dBc, that would be -60 dBc using the 
ARRL method.

I also did a test of a 28 MHz brick amp (Blue Thunder 200) as a dare 
from a friend. He said "if you can clean this amp up, I'll be impressed" 
Judge for yourself.

There are a few more slides at the very end that are the start of 
measurements with my ANAN-100 and ACOM 1006 using a Wavenode RF sampler. 
I used the "no holes" mod for Crosstalk isolation to feed a clean signal 
from the ACOM back to RX1 solving the internal crosstalk issue. 
(although one slide is with internal crosstalk).

Enjoy.

Mike

-- 

73,
Mike, N1JEZ
"A closed mouth gathers no feet"

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