Re: [Flexradio] UCB Info
At 11:05 AM 3/1/2007, you wrote: > >Thanks to everyone that responded. Looks like eBay is a good source for >these relays. I found a similar one to the one Mike used with 4 poles and a >28vdc coil. Not the ideal solution, but is cheap enough to suffer through, >perhaps. > >http://cgi.ebay.com/4-NEW-RelComm-RF-Coaxial-Microwave-Switches-DB9-mw-HOT_W >0QQitemZ260031360065QQihZ016QQcategoryZ1504QQcmdZViewItem > >This seller wants $22 for four (4) of these, but I bought a set for $20. He >claims to have 100 sets of these so there may be plenty to go around for >those who want some. > >Now I need a good source for UT-85 semi-rigid coax and some SMA connectors >to fit. EBay bombed on this one, but I know someone will have a suggestion . Why 0.085 semirigid and not 0.141? The larger stuff is usually easier to install (esp if you use the connectors which just use the center conductor as the pin, although you need the right tooling). The center is pretty small on the 85. I don't know that there's much difference in cost between the two. Also, any particular reason for semirigid at all? If you can find an inexpensive source for premade cables with SMAs on both ends with flexible coax, for short runs, that's probably fine. You have to get pretty high in frequency before the loss in a 1 foot jumper is more than a dB. I would think that there's somewhere to get surplus 6-12-18" jumpers fairly cheap (wireless industry, etc.). These days, for professional work, I use jumpers from Tensolite (for SMA) or RF Coax (for K and 2.4mm). They're actually more stable over temp and aging than semirigid, although if you need to clamp them for vibe/shock, they might not work. But if you're in that situation, you can afford the crimper and tooling from Kings and do it right with crimp on SMAs. Jim, W6RMK ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
I aslo have both an SDR-1000 & an FT-847, & I find exactly the opposite. I can hear signals Q5 on the SDR that are not detectable on the FT-847. A 1uV signal source, such as the Elecraft XG-1 or XG-2, used to check both rigs is the next obvious step. 73, Ray, K9DUR >From: Alan NV8A <[EMAIL PROTECTED]> >To: flexradio@flex-radio.biz >Subject: Re: [Flexradio] Preamp issue? >Date: Thu, 01 Mar 2007 12:33:44 -0500 > >But Dan's not just comparing S-meter readings. He's talking about being >able to hear signals on the FT-847 that he can't hear on the SDR-1000. > >I have no ax to grind in this, as I have neither rig. > >73 > >Alan NV8A > > >On 03/01/07 12:00 pm Tim Ellison wrote: > > > Also, don't trust the S meter on the FT-847. If you have calibrated > > using a signal of known strength, the SDR-1000 is much more accurate. > > > > >> I've been happily using my SDR-1000 as an IF rig for transverters for > > > >> a month now. It seemed to be performing fine. This weekend I put up > > > >> dipoles on 10 and 20m and decided to see how it worked on HF and I > >> was disappointed. I hooked the same antenna to my FT-847 and was > >> hearing stations 3-4 S units better. There were stations that I > >> couldn't even hear on the SDR-1000. I guess the reason I thought it > >> was working well before was because the transverters/preamps are > >> doing all the heavy lifting. > >> > >> I went to the list archives and read about similar problems and tried > > > >> all the suggestions I could find to fix it. I also re-calibrated the > > > >> radio using WWV as the reference but it made no difference. I'm > >> using PowerSDR 1.8.0 with the preamp on high and the AF set at 90. > >> As a last resort I went through the FA-66 setup guide and found one > >> problem. I can't get the sample rate to go higher than 9600. I get > >> an invalid sample rate error if I try to set it to 19200. I'm not > >> sure that this is related to the problem or not but I thought I'd > >> mention it. Anyone have any ideas? > >> > >> Is anyone on the list near Danbury, CT? I'd be interested in > >> bringing my radio over and comparing it to see if the problem is > >> software or hardware related. > > >___ >FlexRadio mailing list >FlexRadio@flex-radio.biz >http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >FlexRadio Homepage: http://www.flex-radio.com/ > >FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] SDR Linux User Group Meeting
Hello Everyone, Just a reminder that the SDR Linux User Group meeting is this evening (in the US) at 0200Z. This is a chance to find out what is new with Software Defined Radio and Linux. You can also find answers to questions that you may be having about Linux. Stop by and join in. Dan N4XWE Have a burning question? Go to www.Answers.yahoo.com and get answers from real people who know. -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070301/656f995a/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Relays for UCB
Steve, Sorry I didn't notice your email earlier. I have relays, all which came from ebay, that range from 6 pole to 20 pole all easily capable of being driven from the UCB. The relays that I use are all 28 volts and work fine as Mike says. The DowKey I have are 6MP-24-L-0001 And the Matrix relays I use are the 7000 series: www.matrixsystems.com Remember the relays are only switching IF information, so they don't have to handle up to 18GHz, although that won't hurt. From some contesting experience, the main factor is the isolation which is why I like the matrix switches, the isolation is over 100db. Hope that helps. Phil K3TUF ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
Hi Dana If it is your pre-amp that was the cullprit, check that the mod with the 2 protection diodes is done in your SDR, I send you a blockdiagram seperately, it will not go trough the reflektor My SDR is at least as sensitive as all my other receivers 73 peter pa0pvn groeten Peter petervn(a)hetnet.nl <mailto:[EMAIL PROTECTED]> ; pa0pvn(a)hetnet.nl <mailto:[EMAIL PROTECTED]> ; pa0pvn(a)gmail.com ; pa0pvn(a)amsat.org . Van: [EMAIL PROTECTED] namens N1OFZ Verzonden: do 1-3-2007 19:35 Aan: flexradio@flex-radio.biz Onderwerp: Re: [Flexradio] Preamp issue? Thanks everyone for the suggestions. A local SDR owner has offered to give me a hand. Hopefully I'll be able to determine quickly if it's a software or hardware issue. I'll report back my finding. I have to say that the SDR community has been the most helpful and supportive group I've seen! Thanks, Dana N1OFZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070301/7c454a3f/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Preamp Issue
I'm running an SDR 1000 with the FA-66. My back-up rigs are a 950SDX and a Pro 3. The SDR blows them both away on transmit and receive. Scotty N6EDV -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070301/ac2bb2f0/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] [Fwd: Preamp issue?]
Dana, the SDR-1000 has the lowest noise floor you can expect from a radio. I am evaluating this radio and compare it with my Kachina and the measurement results of other leading radios. I wonder what you mean with the sampling rates you mention for the FA-66. The figures you name are Baud rates or communication speeds for serial ports. The sampling rates of the FA-66 are 44.1, 48, 96 and 192 kHz. Our radio does not support the 44,1 kHz, which is the sampling rate for CDs. The FA-66 connection to the PC is done via Fire Wire, the speed of which is far higher. If you find the sensitivity of the SDR-1000 to be far lower than one the contentional radios, you may have a hardware problem. One difference to mention is the s-meter. This is much better with the SDR1K than with conventional radios. These are fairly accurate around S 9. They normally show nothing below S 4 and exaggerate above S 9. But you report that you dont't hear the weaker Stations. This means that it is not a matter of the S-meter. How does it look when you attach the antenna to your SDR1k? It should raise the nois floor of your display conciderably. 73, Luer, DF5TP - not very close to your location, rather dx - -- next part -- An embedded message was scrubbed... From: N1OFZ <[EMAIL PROTECTED]> Subject: [Flexradio] Preamp issue? Date: Thu, 1 Mar 2007 10:45:32 -0500 Size: 4489 Url: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070301/2accdf3b/attachment.mht ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] UCB Info
Thanks to everyone that responded. Looks like eBay is a good source for these relays. I found a similar one to the one Mike used with 4 poles and a 28vdc coil. Not the ideal solution, but is cheap enough to suffer through, perhaps. http://cgi.ebay.com/4-NEW-RelComm-RF-Coaxial-Microwave-Switches-DB9-mw-HOT_W 0QQitemZ260031360065QQihZ016QQcategoryZ1504QQcmdZViewItem This seller wants $22 for four (4) of these, but I bought a set for $20. He claims to have 100 sets of these so there may be plenty to go around for those who want some. Now I need a good source for UT-85 semi-rigid coax and some SMA connectors to fit. EBay bombed on this one, but I know someone will have a suggestion . Steve -Original Message- I know everyone has their UCB's put together by now, so on to the installation. Does anyone have a source for a multi-pole binary antenna relay (sma preferred) similar to the one Mike KM0T used. I have Googled, but haven't found what I want, but I'm not familiar with the Microwave parts world. How about some app. notes or enclosure ideas, surely Mike isn't the only one that's built something or has a plan. Just shaking the tree... Steve ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
Thanks everyone for the suggestions. A local SDR owner has offered to give me a hand. Hopefully I'll be able to determine quickly if it's a software or hardware issue. I'll report back my finding. I have to say that the SDR community has been the most helpful and supportive group I've seen! Thanks, Dana N1OFZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
Tim, I don't, but when I have an S3 signal on the FT-847 that I hear clearly and I tune the same freq on the SDR and I hear nothing but static it leads me to believe that the 847 is not too far off. A S5 signal on the 847 is clear as a bell and on the SDR it will be barely copyable. Unfortunately I don't have a signal source in the shack to calibrate with, so I have to use an on air signal. The 847 is stock (no extra filters) so I know it is not a high performance rig. The SDR should be blowing it's doors off. Since I'm home today and I'm trying the suggestions as they come in I have now installed a T adapter on the antenna's coax with a pair of matching patch cables. I now have a realtime side by side comparison. Thanks for the suggestions so far, Dana On Mar 1, 2007, at 12:00 PM, Tim Ellison wrote: > Also, don't trust the S meter on the FT-847. If you have calibrated > using a signal of known strength, the SDR-1000 is much more accurate. > > -Tim ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
On 3/1/07, Tim Ellison <[EMAIL PROTECTED]> wrote:
> Also, don't trust the S meter on the FT-847. If you have calibrated
> using a signal of known strength, the SDR-1000 is much more accurate.
>
If you have an accurate 1uV signal generator, you can test the
absolute sensitivty of the rx and compare to others without regard to
the S-meter indications. Here is an example of how to do this from
the Elecraft site which make a couple of exellent signal generators at
low cost. Set up both rigs as close as possible in configuration,
filters, mode, preamps, attenuators, etc., and you will find out which
has the better signal to noise and sensitivty.
Here are the steps (much of this applies to the Elecraft units, but
can be used with any rig):
Receiver Sensitivity Testing (Using 1 μV Signal)
The XG1 can be used to test absolute receiver sensitivity, providing a
means of comparing various receivers
or transceivers. The instructions below apply to any type of receiver
or transceiver, but we've included
settings for the Elecraft K1 and K2.
1. If you're testing a transceiver, turn its power output level to
minimum as a precaution, and disconnect the
key or keyer and mic. If you're using an ATU, put it into bypass mode
(CAL or CALS on Elecraft tuners).
2. Connect the XG1 to the antenna jack on the receiver (or
transceiver). You can connect the XG1 directly to
receiver or transceiver using a suitable adapter, such as our model BNC-MM .
NOTE: Keep your hands and other objects away from the XG1 during
measurements, as this may affect the
output signal level, especially at the 1-microvolt setting.
3. Turn AGC OFF if possible. (K2, hold PRE+AGC switches. K1, use AGC
menu entry.)
4. Set RF GAIN to maximum.
5. Turn off the attenuator.
6. Turn on the preamp. NOTE: Preamp OFF tests may also be useful.
7. Select CW mode, narrow passband if available ("CW-N" on some rigs).
8. If possible, set the filter bandwidth for about 500 Hz, the
standard for lab receiver tests. (K2, use FLx =
0.70, which corresponds to about 500 Hz. For the K1, use FLx = 500.)
9. Turn off, bypass, or widen the audio filter if applicable. (K2: see
KAF2 or KDSP2 manual.)
10. Connect the probes of a digital multimeter (DMM) across the
speaker terminals. Set the DMM for 2 or 3
volts AC (or RMS) full-scale. (K2: Connect the DMM across the internal
speaker or the external speaker
jack. If you use the headphone jack, don't plug in headphones at the
same time, since this will form voltage
dividers with R35 and R36, lowering the AC voltage reading.)
11. Set the receiver or transceiver for about 7040 kHz.
12. Turn on the XG1 and set it for 1 microvolt output. Replace the
battery if the low-battery LED turns on.
13. Locate the XG1 signal with the receiver. Peak the signal in the
crystal filter passband.
NOTE: BFO settings can affect sensitivity. If the passband peak occurs
at a pitch well outside the expected
range (typically 500-800 Hz), you may need to realign your BFO
settings using an appropriate method (K2:
see application notes on our web site).
14. Set the AF GAIN control fully clockwise (if this results in a
signal that is loud enough to damage the
speaker or cause distortion, use a reduced setting, but make sure you
use the same setting each time).
15. Note the DMM's reading: ___ Vrms (this is the S+N, or
signal+noise reading). NOTE: This value is
useful for comparing overall receiver gain with that of a reference receiver.
16. Turn off the XG1 and note the new reading: ___ Vrms (this is
the N or noise reading).
Signal-to-Noise And MDS Calculations
Using the results from above, you can calculate the signal-to-noise to
noise ratio (S+N/N) at 1
microvolt, and estimate the MDS (minimum discernable signal) as follows:
A. Divide S+N by N; call the resulting ratio R.
B. Take the base-10 logarithm of R ("log" key on most calculators).
C. Multiply the result by 20 to obtain the S+N/N ratio at 1 microvolt, in dB.
D. If the S+N/N is greater than 10 dB, then the MDS is approximately
equal to the result from (C) subtracted from -107 dBm.
Example: DMM readings of 1.0 Vrms (XG1 on), and 0.030 Vrms (XG1 off).
A. R = 1.0/.03 = 33
B. log(30) = 1.52
C. 20 x 1.48 = about 30 dB (this meets the requirement for step D)
D. MDS = -107 dBm - 30 dB = -137 dBm
A K2 should produce a S+N (XG1 on) reading of roughly 0.4-0.8 Vrms,
and more importantly, an MDS of
about -135 dB or better. With an audio filter installed, the S+N and N
readings may be higher, especially if
you've modified the gain settings, but the MDS should be about the
same. Many factors can affect the S+N
and N readings, including whether a KSB2 or KNB2 is installed, how the
40-m band-pass filter and BFOs
are aligned, how L34 is adjusted, and whether the 2nd XFIL
modification has been made (already present in
K2s with S/N 3000 and higher). If the estimated MDS value is lower
than expected, make sure that you have
the preamp on, AGC off, ATU in bypass mode, and RF GAIN set fully clockwise.
A K1 should produce
Re: [Flexradio] Preamp issue?
But Dan's not just comparing S-meter readings. He's talking about being able to hear signals on the FT-847 that he can't hear on the SDR-1000. I have no ax to grind in this, as I have neither rig. 73 Alan NV8A On 03/01/07 12:00 pm Tim Ellison wrote: > Also, don't trust the S meter on the FT-847. If you have calibrated > using a signal of known strength, the SDR-1000 is much more accurate. >> I've been happily using my SDR-1000 as an IF rig for transverters for > >> a month now. It seemed to be performing fine. This weekend I put up > >> dipoles on 10 and 20m and decided to see how it worked on HF and I >> was disappointed. I hooked the same antenna to my FT-847 and was >> hearing stations 3-4 S units better. There were stations that I >> couldn't even hear on the SDR-1000. I guess the reason I thought it >> was working well before was because the transverters/preamps are >> doing all the heavy lifting. >> >> I went to the list archives and read about similar problems and tried > >> all the suggestions I could find to fix it. I also re-calibrated the > >> radio using WWV as the reference but it made no difference. I'm >> using PowerSDR 1.8.0 with the preamp on high and the AF set at 90. >> As a last resort I went through the FA-66 setup guide and found one >> problem. I can't get the sample rate to go higher than 9600. I get >> an invalid sample rate error if I try to set it to 19200. I'm not >> sure that this is related to the problem or not but I thought I'd >> mention it. Anyone have any ideas? >> >> Is anyone on the list near Danbury, CT? I'd be interested in >> bringing my radio over and comparing it to see if the problem is >> software or hardware related. ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
It was set at 100. I've increased it (all the way) to 120 and there is no difference audible or on the meter. On Mar 1, 2007, at 11:13 AM, Mike wrote: > You did not mention the setting of your RF > control. Have you tried that at a high > (> 100) setting? ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
Also, don't trust the S meter on the FT-847. If you have calibrated using a signal of known strength, the SDR-1000 is much more accurate. -Tim Integrated Technical Services www.itsco.com "Si fractum non sit, id reficere" -Unknown Roman consultant -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Naruta Sent: Thursday, March 01, 2007 11:19 AM To: N1OFZ Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Preamp issue? Hi Dana, You did not mention the setting of your RF control. Have you tried that at a high (> 100) setting? On earlier versions of PowerSDR, under the AGC pull-down choose Custom, then on the Set Up menu option, DSP, AGC/ALC, under the AGC column you can increase the Max Gain to as sensitive as you desire. When I first got my SDR-1000 two years ago, I thought that it seemed less sensitive than my other receivers. Then someone pointed out that the default AGC setting was chosen to reduce the noise level. All I had to do was change the parameter on the ACG and I had lots of gain. In the newer versions of the software, they created the "RF Gain" slider on the front panel that makes it easy to adjust. Mike - AA8K N1OFZ wrote: > Hi all, > > I've been happily using my SDR-1000 as an IF rig for transverters for > a month now. It seemed to be performing fine. This weekend I put up > dipoles on 10 and 20m and decided to see how it worked on HF and I > was disappointed. I hooked the same antenna to my FT-847 and was > hearing stations 3-4 S units better. There were stations that I > couldn't even hear on the SDR-1000. I guess the reason I thought it > was working well before was because the transverters/preamps are > doing all the heavy lifting. > > I went to the list archives and read about similar problems and tried > all the suggestions I could find to fix it. I also re-calibrated the > radio using WWV as the reference but it made no difference. I'm > using PowerSDR 1.8.0 with the preamp on high and the AF set at 90. > As a last resort I went through the FA-66 setup guide and found one > problem. I can't get the sample rate to go higher than 9600. I get > an invalid sample rate error if I try to set it to 19200. I'm not > sure that this is related to the problem or not but I thought I'd > mention it. Anyone have any ideas? > > Is anyone on the list near Danbury, CT? I'd be interested in > bringing my radio over and comparing it to see if the problem is > software or hardware related. > > Thanks, > Dana N1OFZ > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Preamp issue?
Hi Dana, You did not mention the setting of your RF control. Have you tried that at a high (> 100) setting? On earlier versions of PowerSDR, under the AGC pull-down choose Custom, then on the Set Up menu option, DSP, AGC/ALC, under the AGC column you can increase the Max Gain to as sensitive as you desire. When I first got my SDR-1000 two years ago, I thought that it seemed less sensitive than my other receivers. Then someone pointed out that the default AGC setting was chosen to reduce the noise level. All I had to do was change the parameter on the ACG and I had lots of gain. In the newer versions of the software, they created the "RF Gain" slider on the front panel that makes it easy to adjust. Mike - AA8K N1OFZ wrote: > Hi all, > > I've been happily using my SDR-1000 as an IF rig for transverters for > a month now. It seemed to be performing fine. This weekend I put up > dipoles on 10 and 20m and decided to see how it worked on HF and I > was disappointed. I hooked the same antenna to my FT-847 and was > hearing stations 3-4 S units better. There were stations that I > couldn't even hear on the SDR-1000. I guess the reason I thought it > was working well before was because the transverters/preamps are > doing all the heavy lifting. > > I went to the list archives and read about similar problems and tried > all the suggestions I could find to fix it. I also re-calibrated the > radio using WWV as the reference but it made no difference. I'm > using PowerSDR 1.8.0 with the preamp on high and the AF set at 90. > As a last resort I went through the FA-66 setup guide and found one > problem. I can't get the sample rate to go higher than 9600. I get > an invalid sample rate error if I try to set it to 19200. I'm not > sure that this is related to the problem or not but I thought I'd > mention it. Anyone have any ideas? > > Is anyone on the list near Danbury, CT? I'd be interested in > bringing my radio over and comparing it to see if the problem is > software or hardware related. > > Thanks, > Dana N1OFZ > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Preamp issue?
Hi all, I've been happily using my SDR-1000 as an IF rig for transverters for a month now. It seemed to be performing fine. This weekend I put up dipoles on 10 and 20m and decided to see how it worked on HF and I was disappointed. I hooked the same antenna to my FT-847 and was hearing stations 3-4 S units better. There were stations that I couldn't even hear on the SDR-1000. I guess the reason I thought it was working well before was because the transverters/preamps are doing all the heavy lifting. I went to the list archives and read about similar problems and tried all the suggestions I could find to fix it. I also re-calibrated the radio using WWV as the reference but it made no difference. I'm using PowerSDR 1.8.0 with the preamp on high and the AF set at 90. As a last resort I went through the FA-66 setup guide and found one problem. I can't get the sample rate to go higher than 9600. I get an invalid sample rate error if I try to set it to 19200. I'm not sure that this is related to the problem or not but I thought I'd mention it. Anyone have any ideas? Is anyone on the list near Danbury, CT? I'd be interested in bringing my radio over and comparing it to see if the problem is software or hardware related. Thanks, Dana N1OFZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Edirol and Vista
Does anyone know if the Edirol FA-66 runs with Vista? According to the Roland/Edirol website, as of today, the manufacturer has yet to check the FA-66 with Vista. Perhaps the Windows Professional 64-bit XP Edirol drivers will work with Vista? 73, Andy W9NJY ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
