Re: [time-nuts] usb serial converter
I see I have that option, but it looks a bit clunky. I didn't want the DVD player I got with the notebook in the first place, let alone another one. ;-) I've worked my way around needing the true serial port with different software. The cardbus came in handy because I needed a line level input for the sound card, so it all worked out in the end. If it isn't obvious to everyone, MS set up the WOW (Windows on Windows) in their 64 bit win 7 OS, to only fall back to 32 bit software. Hence no need for a 16 bit driver on the cardbus. Then again, maybe 32bit win7 still supports 16 bit code, so they should have a driver. On 6/14/2011 10:48 PM, Hal Murray wrote: One of the annoying things is Dell provides a hardware serial port if you buy a docking station, but no way to just get a serial port by itself using the docking port. Well at least that I know of. I have a Dell laptop (Latitude 430) that came with a MediaBase. It's another layer that clips on and plugs into the docking-station connector. It makes the laptop a bit thicker but still looks like a laptop. Mostly, it has a CD-ROM reader, but it also includes a DVI connector, parallel port, and serial port. (and maybe a few more USB connectors) I haven't taken it apart to see if there are any chips inside. The connector has lots of pins so maybe all the silicon is in the laptop. But maybe it's something like a PCI connector with a chip in the MediaBase. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
Will Matney wrote: As far as the power supply is concerned, I think I am going to go with Ni-Cad batteries, and regulate the voltages. I think what they had was nothing more than four step voltages from the battery supply, going from 3, 6 (7), 12, and 24 Vdc, or X2 of the other. From what I saw in the article earlier, an easy zener with emotter follower regulator should do the trick by the comparison with batteries. They used some resistance in series with the zener to reduce noise, but it did decrease the stability somewhat. I have seen this used in some old bias regulation circuits for tubes years ago. A somewhat misguided idea, they really should have used an RC low pass filter between the zener and the output transistor base. The filtering effect is the same but without significantly decreased stability over that of an unfiltered zener.. As far as the noise, I also wondered about this, as ESI used a current limited DC power source to do the same thing, and it was ran off the AC line. Thanks, Will *** REPLY SEPARATOR *** Bruce ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Watch out for a scam by Alex Barski. VE3XAX
I advertised on eHam.net and qrz.com that I was looking for a Kenwood AT-230 ATU. I got a reply from someone claiming to be Alex Barski from Canada with the callsign VE3XAX who has an email address of ve3...@blumail.org. I've no idea if his real name is that, or if he holds that callsign, but I'm suspicious. This person offered me the ATU for $220 shipped to my house, but there were a number of things that make me suspicious this is a scam. 1) When I checked on QRZ.COM, the address and name did not agree with the callsign. The only similarity was they were in Canada. Today when I checked, the information agreed.But yesterday they were definitely different. 2) When I offered to pay via Paypal, I received this: Thanks for the response to my email David but i am sorry i don't use paypal or bank transfer as means of payment due to the instruction giving to me by my bank and lawyer but i will entertain any other safe and reliable mode of payment. Also what is your full shipping information and we can discuss about the payment over the phone, give me your number and i will give you a call to talk. This immediately made me smell a rat, but I decided to play along and gave him my mobile phone number. 3) Today he rings me, withholding the number, and says Western Union would be a safe method of payment. I'm rather sorry I did not play him along a lot longer, but I told him the deal was off. I might email him and say I had second thoughts, and will string him along for a bit of fun. But basically be aware. Today I looked on qrz.com and found others have basically formed the same conclusion of this person http://forums.qrz.com/showthread.php?300792-Fake-VE3XAX-Scam-from-wanted-add The strange thing is, the other person reporting the scam also played along with it. Sometimes these scams can be fun! I think I'll play along a bit more too. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX
David, By the broken English they used in the e-mail, it read like e-mails I've received from Asia, particully Hong Kong parts suppliers. I would say they will accept the payment, and forward it on to somebody else. Check the guys call sign again today, and then a few days later to see if the name on it doesn't change again. This is not saying the part suppliers there are scammers, as I have purchased from several with great results, however a lot of scammers come from there, and hackers. Best, Will Matney *** REPLY SEPARATOR *** On 6/15/2011 at 11:42 AM David Kirkby wrote: I advertised on eHam.net and qrz.com that I was looking for a Kenwood AT-230 ATU. I got a reply from someone claiming to be Alex Barski from Canada with the callsign VE3XAX who has an email address of ve3...@blumail.org. I've no idea if his real name is that, or if he holds that callsign, but I'm suspicious. This person offered me the ATU for $220 shipped to my house, but there were a number of things that make me suspicious this is a scam. 1) When I checked on QRZ.COM, the address and name did not agree with the callsign. The only similarity was they were in Canada. Today when I checked, the information agreed.But yesterday they were definitely different. 2) When I offered to pay via Paypal, I received this: Thanks for the response to my email David but i am sorry i don't use paypal or bank transfer as means of payment due to the instruction giving to me by my bank and lawyer but i will entertain any other safe and reliable mode of payment. Also what is your full shipping information and we can discuss about the payment over the phone, give me your number and i will give you a call to talk. This immediately made me smell a rat, but I decided to play along and gave him my mobile phone number. 3) Today he rings me, withholding the number, and says Western Union would be a safe method of payment. I'm rather sorry I did not play him along a lot longer, but I told him the deal was off. I might email him and say I had second thoughts, and will string him along for a bit of fun. But basically be aware. Today I looked on qrz.com and found others have basically formed the same conclusion of this person http://forums.qrz.com/showthread.php?300792-Fake-VE3XAX-Scam-from-wanted-ad d The strange thing is, the other person reporting the scam also played along with it. Sometimes these scams can be fun! I think I'll play along a bit more too. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. __ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __ The message was checked by ESET Smart Security. http://www.eset.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
Bruce, Correct, and by adding the series resistor for higher impedance, the voltage regulation at the zener value is raised from 10 volts to some value higher. I actually remember a variable bias control to a tube using a similar circuit, except the fixed resistor was a pot. He shows using this on a shunt regulator also on the following page. How much unstability this causes at the value given is unknown without actually building the circuit and testing it, but one shouldn't use a series resistor with a zener this way. I remember Rich Measures and myself speaking of this a few years back. One thing that's not mentioned in the article is that certain resistors can cause noise by themselves. Good articles on this are in some power supply and voltage reference App Notes from both Linear Tech., and National. Best, Will *** REPLY SEPARATOR *** On 6/15/2011 at 6:59 PM Bruce Griffiths wrote: Will Matney wrote: As far as the power supply is concerned, I think I am going to go with Ni-Cad batteries, and regulate the voltages. I think what they had was nothing more than four step voltages from the battery supply, going from 3, 6 (7), 12, and 24 Vdc, or X2 of the other. From what I saw in the article earlier, an easy zener with emotter follower regulator should do the trick by the comparison with batteries. They used some resistance in series with the zener to reduce noise, but it did decrease the stability somewhat. I have seen this used in some old bias regulation circuits for tubes years ago. A somewhat misguided idea, they really should have used an RC low pass filter between the zener and the output transistor base. The filtering effect is the same but without significantly decreased stability over that of an unfiltered zener.. As far as the noise, I also wondered about this, as ESI used a current limited DC power source to do the same thing, and it was ran off the AC line. Thanks, Will *** REPLY SEPARATOR *** Bruce __ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __ The message was checked by ESET Smart Security. http://www.eset.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX
Good morning David (and all), Unfortunately this type of behavior is becoming more common and I read about such happenings far too frequently. Usually starts from someone posting a wanted ad someplace. You are correct, from you description this sounds like a scam plain and simple. Asking for payment via Western Union is one of the BIG indicators. You did your homework and made the right call. There are a number of websites devoted to out-smarting the scammers (a quick google search will find them). There are some individuals that make a sport out of screwing over those that they can and go to great lengths to do so. However, I know of Alex, he belongs to same the ham radio contest club that I do - Contest Club Ontario and is a member in good standing and I have not heard of any complaints. http://www.va3cco.com/index.htm Concerns about Alex could be asked about through the club executive. Alex also holds callsign ve3kf - the QRZ web page for KF has a yahoo email address and the email address in part includes another previous ve3 callsign he has held. I think the real issue is that there is someone or some group pretending to be Alex ve3xax and is attempting to perpetrate a scam and NOT that Alex ve3xax is behind the scam. I guess what I find inappropriate is your subject line in that it is directly being accusatory. Scam artists always pretend to be something or someone they are not. I would suggest that if you already have not, contact the real Alex through the Contest Club Ontario and advise him of what is going on and your concern. He may already be aware of someone defaming his name but then again he may not. As you have already posted to a variety of other email groups and reflectors including at least one of the ham radio contest lists I would suspect that Alex is already aware. Play along with the scammer if you like, you may figure out where he is located and it will most likely not be in North America and could be somewhere in Europe or else where (think Africa). Cheers, Graham ve3gtc -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David Kirkby Sent: June 15, 2011 06:42 To: amps Cc: kenw...@mailman.qth.net; Discussion of precise time and frequency measurement; Yaesu Subject: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX I advertised on eHam.net and qrz.com that I was looking for a Kenwood AT-230 ATU. I got a reply from someone claiming to be Alex Barski from Canada with the callsign VE3XAX who has an email address of ve3...@blumail.org. I've no idea if his real name is that, or if he holds that callsign, but I'm suspicious. This person offered me the ATU for $220 shipped to my house, but there were a number of things that make me suspicious this is a scam. 1) When I checked on QRZ.COM, the address and name did not agree with the callsign. The only similarity was they were in Canada. Today when I checked, the information agreed.But yesterday they were definitely different. 2) When I offered to pay via Paypal, I received this: Thanks for the response to my email David but i am sorry i don't use paypal or bank transfer as means of payment due to the instruction giving to me by my bank and lawyer but i will entertain any other safe and reliable mode of payment. Also what is your full shipping information and we can discuss about the payment over the phone, give me your number and i will give you a call to talk. This immediately made me smell a rat, but I decided to play along and gave him my mobile phone number. 3) Today he rings me, withholding the number, and says Western Union would be a safe method of payment. I'm rather sorry I did not play him along a lot longer, but I told him the deal was off. I might email him and say I had second thoughts, and will string him along for a bit of fun. But basically be aware. Today I looked on qrz.com and found others have basically formed the same conclusion of this person http://forums.qrz.com/showthread.php?300792-Fake-VE3XAX-Scam-from-wanted -add The strange thing is, the other person reporting the scam also played along with it. Sometimes these scams can be fun! I think I'll play along a bit more too. there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX
David, I found this link with a quick search: http://forums.qrz.com/showthread.php?300792-Fake-VE3XAX-Scam-from-wanted-add Best, Will *** REPLY SEPARATOR *** On 6/15/2011 at 11:42 AM David Kirkby wrote: I advertised on eHam.net and qrz.com that I was looking for a Kenwood AT-230 ATU. I got a reply from someone claiming to be Alex Barski from Canada with the callsign VE3XAX who has an email address of ve3...@blumail.org. I've no idea if his real name is that, or if he holds that callsign, but I'm suspicious. This person offered me the ATU for $220 shipped to my house, but there were a number of things that make me suspicious this is a scam. 1) When I checked on QRZ.COM, the address and name did not agree with the callsign. The only similarity was they were in Canada. Today when I checked, the information agreed.But yesterday they were definitely different. 2) When I offered to pay via Paypal, I received this: Thanks for the response to my email David but i am sorry i don't use paypal or bank transfer as means of payment due to the instruction giving to me by my bank and lawyer but i will entertain any other safe and reliable mode of payment. Also what is your full shipping information and we can discuss about the payment over the phone, give me your number and i will give you a call to talk. This immediately made me smell a rat, but I decided to play along and gave him my mobile phone number. 3) Today he rings me, withholding the number, and says Western Union would be a safe method of payment. I'm rather sorry I did not play him along a lot longer, but I told him the deal was off. I might email him and say I had second thoughts, and will string him along for a bit of fun. But basically be aware. Today I looked on qrz.com and found others have basically formed the same conclusion of this person http://forums.qrz.com/showthread.php?300792-Fake-VE3XAX-Scam-from-wanted-ad d The strange thing is, the other person reporting the scam also played along with it. Sometimes these scams can be fun! I think I'll play along a bit more too. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. __ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __ The message was checked by ESET Smart Security. http://www.eset.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
Well a couple of thoughts. As I said modern choppers do work and have big pluses these days. But to the neon bulb. I would use a led thats color more approximates neon. They make them. I rebuilt a HP5360 counter /nixie with modern 7 seg leds that matched the nixie color and it turned out very well. The photo resistors are touchy. The older HP counters actually used neons and photo resistors in the decade counters as the binary to decimal converters. The neon is not standard. Its shorter, typical neons will not fit. My O my has this drifted back to wwvb. Regards Paul On Wed, Jun 15, 2011 at 7:49 AM, Will Matney xfor...@citynet.net wrote: Bruce, Correct, and by adding the series resistor for higher impedance, the voltage regulation at the zener value is raised from 10 volts to some value higher. I actually remember a variable bias control to a tube using a similar circuit, except the fixed resistor was a pot. He shows using this on a shunt regulator also on the following page. How much unstability this causes at the value given is unknown without actually building the circuit and testing it, but one shouldn't use a series resistor with a zener this way. I remember Rich Measures and myself speaking of this a few years back. One thing that's not mentioned in the article is that certain resistors can cause noise by themselves. Good articles on this are in some power supply and voltage reference App Notes from both Linear Tech., and National. Best, Will *** REPLY SEPARATOR *** On 6/15/2011 at 6:59 PM Bruce Griffiths wrote: Will Matney wrote: As far as the power supply is concerned, I think I am going to go with Ni-Cad batteries, and regulate the voltages. I think what they had was nothing more than four step voltages from the battery supply, going from 3, 6 (7), 12, and 24 Vdc, or X2 of the other. From what I saw in the article earlier, an easy zener with emotter follower regulator should do the trick by the comparison with batteries. They used some resistance in series with the zener to reduce noise, but it did decrease the stability somewhat. I have seen this used in some old bias regulation circuits for tubes years ago. A somewhat misguided idea, they really should have used an RC low pass filter between the zener and the output transistor base. The filtering effect is the same but without significantly decreased stability over that of an unfiltered zener.. As far as the noise, I also wondered about this, as ESI used a current limited DC power source to do the same thing, and it was ran off the AC line. Thanks, Will *** REPLY SEPARATOR *** Bruce __ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __ The message was checked by ESET Smart Security. http://www.eset.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX
When someone won't take PayPal but wants Western Union (or any wire-transfer)... that's an instant scam red flag... Report it to the real user if possible that he is victim of identity theft. FYI for everyone... If you didn't know Amazon.com has their own payment system similar to PayPal, except without all the ridiculous fees. If you already have an Amazon.com account it takes 2 seconds to setup one of their payment accounts. https://payments.amazon.com/ Just giving a trustworthy alternative since I know so many people loathe PayPal and their absorbent fees. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
John, I will check it out, and may do some experiments myself on these. Also, I will take a look at the photo-FET's, as I had forgotten about those. What has me wondering is how neon bulbs act in the circuit, their low brightness, and their drop out times, as I think the on voltage is around 90 volts or so, More like 70. They need a higher voltage to turn on (strike). but the square wave going to them is around 100-115 volts if I recall. I thought about using a simple 10:1 resistive divider, then using a series resistor from that junction going to the LED, the same as for a 10-15 volt supply. Neons run at very low currents. The neon bulbs light goes through two Lucite tubes to the CDS cells, and it couldn't be too bright by the time it reached them. Tubes or rods (as a light guide)? I also thought about using a new form of chopper, as Paul mentions, but making it fit and work could get complicated. ESI quit using the HP 419 in the last models of their 801 DC supply and detector-null meter, and started using a Keithly 155. I either figured it was over this very thing, or HP dropped the 419 from its line. An engineer at Vishay told me that they quit using the Fluke over this neon problem, and went to the Keithly in the last versions of this bridge. OK. I'm going to be using the bridge not only as it was intended, but to do other null measurements, as I added a circuit to use the meter circuit seperatly from the bridge. Thanks, Will Good luck. BTW, the HP thread referred to degradation of the CdS cells. You should read it. It is possible to makle a very high Z chopper with CdS. I'm not so sure about other ways. -John ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] usb serial converter
Just to set the record straight about DOS not supporting USB : http://bretjohnson.us/ Christopher On Tue, Jun 14, 2011 at 20:25, li...@lazygranch.com wrote: Just a side note here should it ever come up, those usb serial converters don't work in DOS. DOS doesn't support USB. You can kind of get them working in the so-called DOS window of 32 bit windows, but many DOS apps won't work because DOS allowed from direct control of the port and windows gets in the way. For a while, I was getting away with a Socketcom pcmcia serial port and open DOS (or maybe Free DOS, I forget. My next notebook had cardbus which I guess needs a 32 bit driver. Over the years I have picked up various Socketcom serial cards at flea markets or surplus shops should anyone wish to know what operating systems support them. I also have the DOS TSRs to run the cards. Socketcom never had them on their website, so I had to buy a used card on ebay to get the software. One of the annoying things is Dell provides a hardware serial port if you buy a docking station, but no way to just get a serial port by itself using the docking port. Well at least that I know of. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
In message 201106151021530546.2070a...@smtp.citynet.net, Will Matney writes : My guess is that the LED's brightness helped kill the CDS cells. That is not possible by direct effect, light does not hurt CDS cells. It is far more likely that more intense light than designed has decreased the CDS' resistance causing higher current than was good for them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
Paul, No, not the direct light emitted from the LED, but the extra current the cell passed was probably over their limit. I thought of placing the LED's vertical to the Lucite rods, instead of horizontal, or head-on, to decrease the intensity. From the side, a LED, it's much dimmer. The NE-3 bulbs are placed this way, but that's about the only way to get the most intensity from them. Another thought would be to place a filter between the LED's and the rods to dim them down. What I was going to do was measure the voltage across the CDS cells, with the neon bulbs running, and try to get a LED to create the same voltage drop, or same amount of current through the cell. Best, Will *** REPLY SEPARATOR *** On 6/15/2011 at 2:25 PM Poul-Henning Kamp wrote: In message 201106151021530546.2070a...@smtp.citynet.net, Will Matney writes : My guess is that the LED's brightness helped kill the CDS cells. That is not possible by direct effect, light does not hurt CDS cells. It is far more likely that more intense light than designed has decreased the CDS' resistance causing higher current than was good for them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. __ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __ The message was checked by ESET Smart Security. http://www.eset.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX
Not accepting Pay Pal and using Western Union for money transfer is a sure sign of a scam. I'd say 100% certain. On Wed, Jun 15, 2011 at 3:42 AM, David Kirkby david.kir...@onetel.net wrote: I advertised on eHam.net and qrz.com that I was looking for a Kenwood AT-230 ATU. I got a reply from someone claiming to be Alex Barski from Canada with the callsign VE3XAX who has an email address of ve3...@blumail.org. I've no idea if his real name is that, or if he holds that callsign, but I'm suspicious. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Watch out for a scam by Alex Barski. VE3XAX
I think everyone will find that the guys call sign account has been hacked, or compromised somehow. As the one posted knew the real ham personally, I'd say this is what has happened. He should let him know about this, so he can look into it, as not only was there the Kenwood in question, but also an antenna to somebody else. Best, Will *** REPLY SEPARATOR *** On 6/15/2011 at 7:55 AM Chris Albertson wrote: Not accepting Pay Pal and using Western Union for money transfer is a sure sign of a scam. I'd say 100% certain. On Wed, Jun 15, 2011 at 3:42 AM, David Kirkby david.kir...@onetel.net wrote: I advertised on eHam.net and qrz.com that I was looking for a Kenwood AT-230 ATU. I got a reply from someone claiming to be Alex Barski from Canada with the callsign VE3XAX who has an email address of ve3...@blumail.org. I've no idea if his real name is that, or if he holds that callsign, but I'm suspicious. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. __ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __ The message was checked by ESET Smart Security. http://www.eset.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] usb serial converter
Looks like a 3rd party program, not part of a DOS distribution. Have you successfully used these third party programs with a prolific chipset? -Original Message- From: Christopher Quarksnow cquarks...@gmail.com Date: Wed, 15 Jun 2011 10:09:18 To: li...@lazygranch.com; Discussion of precise time and frequency measurementtime-nuts@febo.com Subject: Re: [time-nuts] usb serial converter Just to set the record straight about DOS not supporting USB : http://bretjohnson.us/ Christopher On Tue, Jun 14, 2011 at 20:25, li...@lazygranch.com wrote: Just a side note here should it ever come up, those usb serial converters don't work in DOS. DOS doesn't support USB. You can kind of get them working in the so-called DOS window of 32 bit windows, but many DOS apps won't work because DOS allowed from direct control of the port and windows gets in the way. For a while, I was getting away with a Socketcom pcmcia serial port and open DOS (or maybe Free DOS, I forget. My next notebook had cardbus which I guess needs a 32 bit driver. Over the years I have picked up various Socketcom serial cards at flea markets or surplus shops should anyone wish to know what operating systems support them. I also have the DOS TSRs to run the cards. Socketcom never had them on their website, so I had to buy a used card on ebay to get the software. One of the annoying things is Dell provides a hardware serial port if you buy a docking station, but no way to just get a serial port by itself using the docking port. Well at least that I know of. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
John, They used Lucite rods, I shouldn't have said tubes. The neon bulbs are about at the center of the PC board, and the CDS cells are at the edge, so to get the light to them, they used the rods. More than that. They wanted to minimize capacitance coupled between the neons and cells to reducing switching spikes. I think they did the same thing on the 845AB too, but I'm not looking at the manual right now to see for sure, as I'm not sure the 844 and 845 use the same PC board, just the same circuitry. The 844 was sold to other manufacturers, and it came in a plain aluminum box, with the switch shaft sticking out the front. The meter and pots were shipped seperate to be mounted in the customers equipment. HP did the same with the 419, and tacked another letter on the model number, as well as Keithly, which I know uses the same PC board in both versions. Keithly didn't use this type of chopper though (using LED's or lamps). I am going to locate the post on the HP forum and read about it. My guess is that the LED's brightness helped kill the CDS cells. I don't think so. Apparently the CdS cells had aged into uselessness before any LEDS were installed. Read the thread. I was thinking about trying an orange or yellow LED here, and dimming the LED with the series resistor, trying to make it as dim as the neon bulb, but I don't know if a LED can be dimmed down that low. On the old HP 412 VTVM, the incandescent bulbs in it were not very bright, and they were using CDS cells with them. Another instance of this, if I recall, was that Tektronix used a chopper like this in one of their older scope calibrators. Thanks, Will Good luck, -John == ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
I was thinking about trying an orange or yellow LED here, and dimming the LED with the series resistor, trying to make it as dim as the neon bulb, but I don't know if a LED can be dimmed down that low. LEDs work fine at low output levels. At low current, the light output is linear with current. It falls off at high current and/or high temperature. -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Low noise power supply recommendations
There get slower with falling current. - Henry -- ehydra.dyndns.info Hal Murray schrieb: I was thinking about trying an orange or yellow LED here, and dimming the LED with the series resistor, trying to make it as dim as the neon bulb, but I don't know if a LED can be dimmed down that low. LEDs work fine at low output levels. At low current, the light output is linear with current. It falls off at high current and/or high temperature. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] usb serial converter
See also http://www.bootdisk.com/usb.htm I've used it extensively for long under native MS DOS 6.22 to connect pen- disks. Surely worked with USB ports 1.1, but I don't recall whether or not I did tests with USB 2.0 Antonio I8IOV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Tek DD-501 as a Frequency Divider
I'm interested in generating pulses precisely spaced with a period of 20,000 uS to 100,000 uS, digitally settable, and was thinking of using a Tek DD501 and a 1.00 MHz crystal oscillator The 1 MHz would go into the Events input; the Trig Out would go to the Trig in. This configuration would produce a train of narrow pulses with a period of (Dial Setting + 1) uS. Has anybody tried this? Comments ? -John === ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] wwvb down to 30 KW until end of june
Could not detect wwvb from the east coast today. They have cut power to 30 KW. Was wondering why some of the atomic clocks were not working. This started about 7June. Regards Paul WB8TSL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Tek DD-501 as a Frequency Divider
John have not and have never seen a tek dd501 Regards On Wed, Jun 15, 2011 at 7:05 PM, J. Forster j...@quik.com wrote: I'm interested in generating pulses precisely spaced with a period of 20,000 uS to 100,000 uS, digitally settable, and was thinking of using a Tek DD501 and a 1.00 MHz crystal oscillator The 1 MHz would go into the Events input; the Trig Out would go to the Trig in. This configuration would produce a train of narrow pulses with a period of (Dial Setting + 1) uS. Has anybody tried this? Comments ? -John === ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] usb serial converter
No mention of serial, but it looks hopeful. Actually if I had a driver from the Ricoh cardbus, I would just use the socketcom. --Original Message-- From: iov...@inwind.it Sender: time-nuts-boun...@febo.com To: Discussion of precise time and frequency measurement ReplyTo: iov...@inwind.it ReplyTo: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] usb serial converter Sent: Jun 15, 2011 3:39 PM See also http://www.bootdisk.com/usb.htm I've used it extensively for long under native MS DOS 6.22 to connect pen- disks. Surely worked with USB ports 1.1, but I don't recall whether or not I did tests with USB 2.0 Antonio I8IOV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
