Re: [Flexradio] SDR X2 and dead rx

[Jeff Anderson]

For what it's worth...several times I've had my SDR automatically start
sending dits when I've selected CW mode, and I've always been able to make
it stop by jiggling the CW Key cable that I have plugged into the back of
the SDR.  In my case, I've assumed that somehow the CW jack on the back of
the SDR (into which the plug on my key cable is plugged) is somehow screwing
up.

- Jeff, K6JCA

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Larry Loen
Sent: Sunday, November 12, 2006 4:07 PM
To: A.R.S. - W5AMI
Cc: Flex Radio
Subject: Re: [Flexradio] SDR X2 and dead rx


A.R.S. - W5AMI wrote:

>It seems like I've seen some discussion on this before, but I could
>not find it in the archives.
>
>Once in a while when I power up my SDR, the X2 will activate the key
>line to my AMP or external TX, etc.  I have no idea why it would do
>this.
>

I have had similar symptoms, but I don't know if my X2 is involved or
not.  No amp is involved, at any rate.

What usually happens in my case is that when I put it in CW mode, it
will go into a "keydown" mode as if I had put a rock on my CW key (this
ends up being a set of dits or dahs, then, based on the current keyer
setting for speed).

The cure has so far been to reseat the parallel cable a couple of times.
 Then, once it finally and randomly goes away, to screw down the
connection to the parallel port well in hopes of preserving the good
connections.

I've had the problem with both USB and parallel -- slightly less often
with the latter, actually.

I've also had it simply assert transmit upon powering up the rig, but
not as often, certainly not as often of late.

There does seem to be something touchy somewhere in how the parallel
cable relates to T/R switching, but since I usually get past it fairly
quickly, I've never really tracked it down.



Larry   WO0Z


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Re: [Flexradio] SDR X2 and dead rx

[A.R.S. - W5AMI]

Thanks for all the replies...

Well, it would appear my rx is gone for sure since I posted this
thread.  I don't have the USB interface, so I can't tell if it has
anything to do with the parallel port.  All I know is that my rx will
not come alive this time.  I can hear some signals, however very weak,
like - 135 dbm.  I thought something may have happened to the
feedline/antenna, but the SDR transmits fines with low SWR.  Does this
sound typical of front end failure tothe receiver or could it be
something more obvious and user repairable?

Thanks,
Brian / w5ami


On 11/12/06, WARD,AL <[EMAIL PROTECTED]> wrote:
> I really wish you guys had not brought up this subject as my SDR-1000 as
> of just a few hours ago has now started to go in to the xmit mode at
> will and will not respond to any attempts to make it go to receive. I
> have rebooted my computer and it has no effect. I restart my Forebox,
> the SDR, and turn off and restart the software and it gets stuck in the
> xmit mode more time than it is in receive. At one point, it seemed that
> slight touching or movement of my mouse would bring it back to receive
> but then you let go and it is back in xmit. I have just the 1w version.
>
> At present, my SDR-1000 is stuck in transmit.
>
> Any ideas? No hardware changes here since getting it up and running a
> week ago.
>
> It worked great on 2M JT65 last night.
>
> 73
> Al W5LUA
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Larry Loen
> Sent: Sunday, November 12, 2006 6:07 PM
> To: A.R.S. - W5AMI
> Cc: Flex Radio
> Subject: Re: [Flexradio] SDR X2 and dead rx
>
> A.R.S. - W5AMI wrote:
>
> >It seems like I've seen some discussion on this before, but I could
> >not find it in the archives.
> >
> >Once in a while when I power up my SDR, the X2 will activate the key
> >line to my AMP or external TX, etc.  I have no idea why it would do
> >this.
> >
>
> I have had similar symptoms, but I don't know if my X2 is involved or
> not.  No amp is involved, at any rate.
>
> What usually happens in my case is that when I put it in CW mode, it
> will go into a "keydown" mode as if I had put a rock on my CW key (this
> ends up being a set of dits or dahs, then, based on the current keyer
> setting for speed).
>
> The cure has so far been to reseat the parallel cable a couple of times.
>
>  Then, once it finally and randomly goes away, to screw down the
> connection to the parallel port well in hopes of preserving the good
> connections.
>
> I've had the problem with both USB and parallel -- slightly less often
> with the latter, actually.
>
> I've also had it simply assert transmit upon powering up the rig, but
> not as often, certainly not as often of late.
>
> There does seem to be something touchy somewhere in how the parallel
> cable relates to T/R switching, but since I usually get past it fairly
> quickly, I've never really tracked it down.
>
>
>
> Larry   WO0Z
>
>
>
>
>
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> Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/
> FlexRadio Homepage: http://www.flex-radio.com
>


-- 
"There is nothing more uncommon than common sense." -- Frank Lloyd Wright

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Re: [Flexradio] SDR X2 and dead rx

[WARD,AL]

Hi Gerald 

I use the USB to parallel adapter cable and today off and on I have been
pulling the cable and connecting my camera stick card reader to upload
pictures from my grandson's work of art.maybe that is related to the
problem??

73

Al

-Original Message-
From: Gerald Youngblood [mailto:[EMAIL PROTECTED] 
Sent: Sunday, November 12, 2006 6:28 PM
To: WARD,AL; [EMAIL PROTECTED]; 'A.R.S. - W5AMI'
Cc: 'Flex Radio'
Subject: RE: [Flexradio] SDR X2 and dead rx

Al,
This usually means that the parallel port connector is not seated
properly
on one end or the other.  
Gerald

Gerald Youngblood, K5SDR
FlexRadio Systems
Ph: 512-535-5266
Fax: 512-233-5143
Email: [EMAIL PROTECTED]
Web: www.flex-radio.com
 

> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of WARD,AL
> Sent: Sunday, November 12, 2006 6:23 PM
> To: [EMAIL PROTECTED]; A.R.S. - W5AMI
> Cc: Flex Radio
> Subject: Re: [Flexradio] SDR X2 and dead rx
> 
> I really wish you guys had not brought up this subject as my 
> SDR-1000 as of just a few hours ago has now started to go in 
> to the xmit mode at will and will not respond to any attempts 
> to make it go to receive. I have rebooted my computer and it 
> has no effect. I restart my Forebox, the SDR, and turn off 
> and restart the software and it gets stuck in the xmit mode 
> more time than it is in receive. At one point, it seemed that 
> slight touching or movement of my mouse would bring it back 
> to receive but then you let go and it is back in xmit. I have 
> just the 1w version.
> 
> At present, my SDR-1000 is stuck in transmit.
> 
> Any ideas? No hardware changes here since getting it up and 
> running a week ago.
> 
> It worked great on 2M JT65 last night.
> 
> 73
> Al W5LUA
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Larry Loen
> Sent: Sunday, November 12, 2006 6:07 PM
> To: A.R.S. - W5AMI
> Cc: Flex Radio
> Subject: Re: [Flexradio] SDR X2 and dead rx
> 
> A.R.S. - W5AMI wrote:
> 
> >It seems like I've seen some discussion on this before, but 
> I could not 
> >find it in the archives.
> >
> >Once in a while when I power up my SDR, the X2 will activate the key 
> >line to my AMP or external TX, etc.  I have no idea why it would do 
> >this.
> >
> 
> I have had similar symptoms, but I don't know if my X2 is 
> involved or not.  No amp is involved, at any rate.
> 
> What usually happens in my case is that when I put it in CW 
> mode, it will go into a "keydown" mode as if I had put a rock 
> on my CW key (this ends up being a set of dits or dahs, then, 
> based on the current keyer setting for speed).
> 
> The cure has so far been to reseat the parallel cable a 
> couple of times.
> 
>  Then, once it finally and randomly goes away, to screw down 
> the connection to the parallel port well in hopes of 
> preserving the good connections.
> 
> I've had the problem with both USB and parallel -- slightly 
> less often with the latter, actually.
> 
> I've also had it simply assert transmit upon powering up the 
> rig, but not as often, certainly not as often of late.
> 
> There does seem to be something touchy somewhere in how the 
> parallel cable relates to T/R switching, but since I usually 
> get past it fairly quickly, I've never really tracked it down.
> 
> 
> 
> Larry   WO0Z
> 
> 
> 
> 
> 
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> 


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Re: [Flexradio] SDR X2 and dead rx

[Gerald Youngblood]

Al,
This usually means that the parallel port connector is not seated properly
on one end or the other.  
Gerald

Gerald Youngblood, K5SDR
FlexRadio Systems
Ph: 512-535-5266
Fax: 512-233-5143
Email: [EMAIL PROTECTED]
Web: www.flex-radio.com
 

> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of WARD,AL
> Sent: Sunday, November 12, 2006 6:23 PM
> To: [EMAIL PROTECTED]; A.R.S. - W5AMI
> Cc: Flex Radio
> Subject: Re: [Flexradio] SDR X2 and dead rx
> 
> I really wish you guys had not brought up this subject as my 
> SDR-1000 as of just a few hours ago has now started to go in 
> to the xmit mode at will and will not respond to any attempts 
> to make it go to receive. I have rebooted my computer and it 
> has no effect. I restart my Forebox, the SDR, and turn off 
> and restart the software and it gets stuck in the xmit mode 
> more time than it is in receive. At one point, it seemed that 
> slight touching or movement of my mouse would bring it back 
> to receive but then you let go and it is back in xmit. I have 
> just the 1w version.
> 
> At present, my SDR-1000 is stuck in transmit.
> 
> Any ideas? No hardware changes here since getting it up and 
> running a week ago.
> 
> It worked great on 2M JT65 last night.
> 
> 73
> Al W5LUA
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Larry Loen
> Sent: Sunday, November 12, 2006 6:07 PM
> To: A.R.S. - W5AMI
> Cc: Flex Radio
> Subject: Re: [Flexradio] SDR X2 and dead rx
> 
> A.R.S. - W5AMI wrote:
> 
> >It seems like I've seen some discussion on this before, but 
> I could not 
> >find it in the archives.
> >
> >Once in a while when I power up my SDR, the X2 will activate the key 
> >line to my AMP or external TX, etc.  I have no idea why it would do 
> >this.
> >
> 
> I have had similar symptoms, but I don't know if my X2 is 
> involved or not.  No amp is involved, at any rate.
> 
> What usually happens in my case is that when I put it in CW 
> mode, it will go into a "keydown" mode as if I had put a rock 
> on my CW key (this ends up being a set of dits or dahs, then, 
> based on the current keyer setting for speed).
> 
> The cure has so far been to reseat the parallel cable a 
> couple of times.
> 
>  Then, once it finally and randomly goes away, to screw down 
> the connection to the parallel port well in hopes of 
> preserving the good connections.
> 
> I've had the problem with both USB and parallel -- slightly 
> less often with the latter, actually.
> 
> I've also had it simply assert transmit upon powering up the 
> rig, but not as often, certainly not as often of late.
> 
> There does seem to be something touchy somewhere in how the 
> parallel cable relates to T/R switching, but since I usually 
> get past it fairly quickly, I've never really tracked it down.
> 
> 
> 
> Larry   WO0Z
> 
> 
> 
> 
> 
> ___
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> 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
> 
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> Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/
> FlexRadio Homepage: http://www.flex-radio.com
> 


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Re: [Flexradio] SDR X2 and dead rx

[WARD,AL]

I really wish you guys had not brought up this subject as my SDR-1000 as
of just a few hours ago has now started to go in to the xmit mode at
will and will not respond to any attempts to make it go to receive. I
have rebooted my computer and it has no effect. I restart my Forebox,
the SDR, and turn off and restart the software and it gets stuck in the
xmit mode more time than it is in receive. At one point, it seemed that
slight touching or movement of my mouse would bring it back to receive
but then you let go and it is back in xmit. I have just the 1w version.

At present, my SDR-1000 is stuck in transmit.

Any ideas? No hardware changes here since getting it up and running a
week ago.

It worked great on 2M JT65 last night.

73
Al W5LUA

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Larry Loen
Sent: Sunday, November 12, 2006 6:07 PM
To: A.R.S. - W5AMI
Cc: Flex Radio
Subject: Re: [Flexradio] SDR X2 and dead rx

A.R.S. - W5AMI wrote:

>It seems like I've seen some discussion on this before, but I could
>not find it in the archives.
>
>Once in a while when I power up my SDR, the X2 will activate the key
>line to my AMP or external TX, etc.  I have no idea why it would do
>this.  
>

I have had similar symptoms, but I don't know if my X2 is involved or 
not.  No amp is involved, at any rate.

What usually happens in my case is that when I put it in CW mode, it 
will go into a "keydown" mode as if I had put a rock on my CW key (this 
ends up being a set of dits or dahs, then, based on the current keyer 
setting for speed).

The cure has so far been to reseat the parallel cable a couple of times.

 Then, once it finally and randomly goes away, to screw down the 
connection to the parallel port well in hopes of preserving the good 
connections.

I've had the problem with both USB and parallel -- slightly less often 
with the latter, actually.

I've also had it simply assert transmit upon powering up the rig, but 
not as often, certainly not as often of late.

There does seem to be something touchy somewhere in how the parallel 
cable relates to T/R switching, but since I usually get past it fairly 
quickly, I've never really tracked it down.



Larry   WO0Z





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Re: [Flexradio] SDR X2 and dead rx

[Larry Loen]

A.R.S. - W5AMI wrote:

>It seems like I've seen some discussion on this before, but I could
>not find it in the archives.
>
>Once in a while when I power up my SDR, the X2 will activate the key
>line to my AMP or external TX, etc.  I have no idea why it would do
>this.  
>

I have had similar symptoms, but I don't know if my X2 is involved or 
not.  No amp is involved, at any rate.

What usually happens in my case is that when I put it in CW mode, it 
will go into a "keydown" mode as if I had put a rock on my CW key (this 
ends up being a set of dits or dahs, then, based on the current keyer 
setting for speed).

The cure has so far been to reseat the parallel cable a couple of times. 
 Then, once it finally and randomly goes away, to screw down the 
connection to the parallel port well in hopes of preserving the good 
connections.

I've had the problem with both USB and parallel -- slightly less often 
with the latter, actually.

I've also had it simply assert transmit upon powering up the rig, but 
not as often, certainly not as often of late.

There does seem to be something touchy somewhere in how the parallel 
cable relates to T/R switching, but since I usually get past it fairly 
quickly, I've never really tracked it down.



Larry   WO0Z





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Re: [Flexradio] SDR X2 and dead rx

[Jeff Anderson]

I'm curious - where does the information that there's a "gradual
polarization of the core with eventual "fail to open" come from?  I've never
heard of this.

Also - if there's only low current passing through the relay contacts (which
is probably true in many cases - especially those in which there's a keying
ckt within the linear), I personally wouldn't worry about the effect of a
diode back-emf suppressor on relay contact life.

- Jeff, K6JCA

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Jim Lux
Sent: Sunday, November 12, 2006 2:29 PM
To: Gerald Capodieci; A.R.S. - W5AMI; Flex Radio
Subject: Re: [Flexradio] SDR X2 and dead rx


At 12:35 PM 11/12/2006, Gerald Capodieci wrote:
>I've had exactly the same problems. I keep my amp in standby until
>ready for use. No suggestions though.
>   I walked away for an hour 'once' leaving the amp in OPR, When I
> came back I saw it was keyed and the air from the 3-500s were 180
> degrees F - (They'll take 220 C) It all sounds like there is a
> relay that needs to be broken in or better controlled in some
> way.  Turning the SDR off or putting it in standby slowly unkeys the amp.


What sort of transient suppression are you using on the relay
coils?  The popular "diode across the relay coil" can significantly
reduce the useful life of the relay (because it tends to result in
slow "break" and gradual polarization of the core with eventual "fail
to open").

I've recently learned that the relay manufacturers (e.g. Tyco)
recommend against this sort of thing:
<http://relays.tycoelectronics.com/appnotes/>http://relays.tycoelectronics.c
om/appnotes/
especially the first one listed.
FlexRadio Homepage: http://www.flex-radio.com


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Re: [Flexradio] SDR X2 and dead rx

[Jim Lux]

At 12:35 PM 11/12/2006, Gerald Capodieci wrote:
>I've had exactly the same problems. I keep my amp in standby until 
>ready for use. No suggestions though.
>   I walked away for an hour 'once' leaving the amp in OPR, When I 
> came back I saw it was keyed and the air from the 3-500s were 180 
> degrees F - (They'll take 220 C) It all sounds like there is a 
> relay that needs to be broken in or better controlled in some 
> way.  Turning the SDR off or putting it in standby slowly unkeys the amp.


What sort of transient suppression are you using on the relay 
coils?  The popular "diode across the relay coil" can significantly 
reduce the useful life of the relay (because it tends to result in 
slow "break" and gradual polarization of the core with eventual "fail 
to open").

I've recently learned that the relay manufacturers (e.g. Tyco) 
recommend against this sort of thing:
http://relays.tycoelectronics.com/appnotes/
 
especially the first one listed.


Mind you, the parallel port on a PC (which is what drives the X2 
connector eventually) is notorious for poor state control during 
boot, reset, what have you.  Not a real issue for a printer, where 
they have a lot of debouncing and, besides, only really care about 
the strobe line. All those other lines just do things like reset the 
printer or enable something.  And, unlike a printer, the SDR1000 has 
fairly fast latches: a 574 with tens of nanosecond sort of  setup 
times is a far cry from the 1 microsecond sort timing implied by the 
venerable "Centronics" interface.  The 1 microsecond setup, 1 
microsecond strobe, 1 microsecond hold for Centronics wasn't because 
the logic couldn't go any faster (it could, even back in the 70s), 
but was for noise immunity.  It may be unfortunate, too, that the 
printer "strobe" line is the one that's used for latching the stuff 
that goes to X2.  That's the one most likely to get a spurious data 
write on (from some driver that thinks that it really needs to write 
to the printer port)

The USB cables, because they present an abstracted "printer" 
interface are less likely to have weird stuff coming out on them.



Jim W6RMK 
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Re: [Flexradio] SDR X2 and dead rx

[Gerald Capodieci]

I've had exactly the same problems. I keep my amp in standby until ready for 
use. No suggestions though.
  I walked away for an hour 'once' leaving the amp in OPR, When I came back I 
saw it was keyed and the air from the 3-500s were 180 degrees F - (They'll take 
220 C) It all sounds like there is a relay that needs to be broken in or better 
controlled in some way.  Turning the SDR off or putting it in standby slowly 
unkeys the amp.

"A.R.S. - W5AMI" <[EMAIL PROTECTED]> wrote:
  It seems like I've seen some discussion on this before, but I could
not find it in the archives.

Once in a while when I power up my SDR, the X2 will activate the key
line to my AMP or external TX, etc. I have no idea why it would do
this. I use an Ameritron amp relay buffer, and it lights up
indicating when the key line is active. When this happens, the SDR is
not even in TX, so the amp, or whatever external TX you are driving is
keyed while the SDR in in rx. Fortunately, the amp is usually not
turned on until after I turn on the SDR, but not this morning. Now it
seems my receive is dead, or at least very weak.

I have had my rx go dead after unkeying before, as if a relay is not
fully closed or open, and I can usually just hit the Standby button a
couple of times and it will come back. This only happens once in a
while, but I can always regain my rx, but nothing I've tried this
morning has worked.

I suspect the front end on my rx is zapped. Any ideas?

Thanks,
Brian / w5ami

-- 
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Re: [Flexradio] SDR X2 and dead rx

[Dave & Nancy Ridge]

I have the same problems. (X2 gets keyed and rx zapped) In addition, since I 
use various X2 pins to key different antenna relays for different antenna 
switching, they also get keyed when tuning the SDR up and down the band. I 
have found this problem is with all SVN's and 1.6.2 and 1.6.3 on all bands.

The only fix that I have found is to use a USB cable between the SDR and the 
computer rather than the parallel cable.

Still love the radio!!!

Dave, W9DR, Punta Gorda, Florida


- Original Message - 
From: "A.R.S. - W5AMI" <[EMAIL PROTECTED]>
To: "Flex Radio" 
Sent: Sunday, November 12, 2006 1:54 PM
Subject: [Flexradio] SDR X2 and dead rx


> It seems like I've seen some discussion on this before, but I could
> not find it in the archives.
>
> Once in a while when I power up my SDR, the X2 will activate the key
> line to my AMP or external TX, etc.  I have no idea why it would do
> this.  I use an Ameritron amp relay buffer, and it lights up
> indicating when the key line is active.  When this happens, the SDR is
> not even in TX, so the amp, or whatever external TX you are driving is
> keyed while the SDR in in rx.  Fortunately, the amp is usually not
> turned on until after I turn on the SDR, but not this morning.  Now it
> seems my receive is dead, or at least very weak.
>
> I have had my rx go dead after unkeying before, as if a relay is not
> fully closed or open, and I can usually just hit the Standby button a
> couple of times and it will come back.  This only happens once in a
> while, but I can always regain my rx, but nothing I've tried this
> morning has worked.
>
> I suspect the front end on my rx is zapped.  Any ideas?
>
> Thanks,
> Brian / w5ami
>
> -- 
> "There is nothing more uncommon than common sense." -- Frank Lloyd Wright
>
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