开云体育

I completed my SoftRock-40 just before leaving for the GQRP mini-convention in Rotherham, and didn't have time to test it. I've just plugged it into my PC (running the SDRadio software) and connected it up to my trusty Marconi 2019A signal generator and it seems to be working OK - I can hear a -106 dBm signal at 7.040 MHz and can probably go lower. Has anyone else checked the sensitivity? I'll try it out with an antenna later.

I've promised George, G3RJV, a write-up for Sprat. I met someone at Rochdale who is building one, and someone else who wanted one but missed out.

73, Leon
--
Leon Heller, G1HSM
leon.heller@...


---
[This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are
currently using to read this email. ]

Good Morning Leon,

After building about 70 of the little receivers, this is what I typically see when level is calibrated with an Elecraft XG1:

S9 calibrated at -73 dBm with the 50 uV RMS output of the XG1 and
-107 dBm, the 1 uV RMS output of the XG1, is usually about 30 dB above the noise floor.

Also reported is the 1 dB compression point at about -20 dBm.

Happy to hear the kit has gone together well for you.

73,
Tony KB9YIG

Hi Tony

Thank you for the information as I have the Elecraft XG1 also. I still plan to
have you build my receiver but the data will be good for comparison.
A new model is also available.
XG2 Three Band Receiver Test Oscillator / S-Meter Calibrator


Cheers

Richard Gagnon



--- Tony Parks <raparks@...> wrote:

Good Morning Leon,

After building about 70 of the little receivers, this is what I typically
see when level is calibrated with an Elecraft XG1:

S9 calibrated at -73 dBm with the 50 uV RMS output of the XG1 and
-107 dBm, the 1 uV RMS output of the XG1, is usually about 30 dB above the
noise floor.

Also reported is the 1 dB compression point at about -20 dBm.

Happy to hear the kit has gone together well for you.

73,
Tony KB9YIG
----- Original Message -----
From: "Leon Heller" <leon.heller@...>
To: <qrp-l@...>; <softrock40@...>
Sent: Monday, October 10, 2005 7:24 AM
Subject: [softrock40] Success with SR-40

I completed my SoftRock-40 just before leaving for the GQRP mini-convention
in Rotherham, and didn't have time to test it. I've just plugged it into
my
PC (running the SDRadio software) and connected it up to my trusty Marconi
2019A signal generator and it seems to be working OK - I can hear a -106
dBm
signal at 7.040 MHz and can probably go lower. Has anyone else checked the
sensitivity? I'll try it out with an antenna later.

I've promised George, G3RJV, a write-up for Sprat. I met someone at
Rochdale
who is building one, and someone else who wanted one but missed out.

73, Leon
--
Leon Heller, G1HSM
leon.heller@...


---
[This E-mail has been scanned for viruses but it is your responsibility
to maintain up to date anti virus software on the device that you are
currently using to read this email. ]





Yahoo! Groups Links

Yahoo! Groups Links

__________________________________
Yahoo! Mail - PC Magazine Editors' Choice 2005

Hi Chuck,

XG1 works with just about any crystal you stuff into
it. I occasionally use mine on 20 with a 14.060
crystal. The new XG2 uses exactly the same oscillator
circuit for 80/40/20 coverage with a little 3 position
rotary switch. They change the series cap value
between bands, though. That would be easy to implement
with dip pin sockets too.

The only major difference between the XG1 and XG2,
besides bandswitching crystals, is elimination of the
LMC6482 op amp for a low battery detector. It never
really worked for me anyway. I'm going to use it to
build a second Accuprobe for use in a NoGaWatt once
you do all the design work on yours. hi.

BTW, I bought an Accuprobe and once I saw it decided a
full-sized Altoids tin didn't qualified as a "probe".
So I built all the parts on a slim piece of perf board
and stuffed it in an aluminum cigar tube. Now it's a
PROBE. hi. Pictures on my web site. Works great!

Eric
KE6US
www.ke6us.com



--- Chuck Carpenter <w5usj@...> wrote:

Tony,

Just ordered an XG-1 -- hadn't had a serious need
for something like that
until the SR-40...[g]

I hope I can put a SIP socket for the crystal and
use it on 30 meters too.

Thanks again for all the help. I even downloaded
the manuals from the Flex
Radio website -- progress...


Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|-
EM22cv -|- 72 es 73
50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun
= QRP since 1984.
www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP
www.netxqrp.com



------------------------ Yahoo! Groups Sponsor
--------------------~-->
Get fast access to your favorite Yahoo! Groups. Make
Yahoo! your home page

--------------------------------------------------------------------~->

Yahoo! Groups Links


softrock40-unsubscribe@...

__________________________________
Yahoo! Music Unlimited
Access over 1 million songs. Try it free.