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John Heath <heathjohn2@gmail.com>: Dec 25 08:43AM -0800 On Wednesday, December 23, 2015 at 8:14:17 PM UTC-5, Phil Allison wrote:   > ** The OP fixed the oscillation problem, after acting on my advice about cable dress. A previous repairer had been careless.   > .... Phil   I can see how wire dressing would cause this with high gain of a guitar amp. However this is Monday night quarterbacking. One does not know it is wire dressing , flat electrolytic , cold solder. Oscillation problems are almost as bad as intermittent problems. You can go round and round all day with no clear path to success. I say do not be a hero. If it walks like a dog and it talks like a dog get out of it while you can. Once that repair is billed you have entered a contract for 90 days warranty where the the window of opportunity to get out of it is lost. It can put you out of business. Related to wire dressing I have noticed in some preamps the power transformer is mounted in an odd orientation. Often at 45 degrees to the chassis frame. I imagine an engineer when prototyping move the power transformer here and there finding the sweet null spot where stray 60 CPS would not couple into the inputs. I have a bench frequency counter that is the same with the power transformer mounted at 45 degrees relative to the chassis frame.

Adrian Caspersz <email@here.invalid>: Dec 24 05:06PM On 23/12/15 22:31, Paul M. Cook wrote: >> UPNP on your router or maybe disable port 9000 in the firewall rules   > I disabled UPNP. > I'll tell the kid to watch out for stuff not working.   I suspect he'll tell you first ...   If you are that worried about it, why not put the Playstation in your DMZ and firewall everything else reaching your LAN? Your kid would get better gameplay that way.   -- Adrian C

Tony Hwang <dragon40@shaw.ca>: Dec 24 06:34PM -0700 Paul M. Cook wrote: >> UPNP on your router or maybe disable port 9000 in the firewall rules   > I disabled UPNP. > I'll tell the kid to watch out for stuff not working.   Some one is connceting to one of your device connected. (192.168.1.5 what is this in your family?) using port 9000. You can trace route the other ip address to see what or who this belongs to. Trace route is a DOS command.

"Paul M. Cook" <pmcook@gte.net>: Dec 24 11:30PM -0500 On Thu, 24 Dec 2015 14:56:48 -0600, Mark Lloyd wrote:   > Yes, it will. The point of what I posted is that SSID blocking is NOT > useless. I didn't say anything about it being better than anything else.   Seems to me, that's a lousy tradeoff.   1. You turn off SSID broadcast at home, but that doesn't deter anyone who knows what he's doing (since your laptop & phone has to broadcast your hidden SSID to the router, since the router isn't broadcasting the SSID to the laptop & phone).   2. And, since your laptop or phone doesn't know when it's at home or at a local hotspot, your laptop and phone end up broadcasting your SSID to the whole world when you're away from home.   Seems to me, that's a lousy tradeoff.   It's not privacy. It's just stupidity.   Or ignorance.

"Paul M. Cook" <pmcook@gte.net>: Dec 24 11:35PM -0500 On Thu, 24 Dec 2015 18:34:58 -0700, Tony Hwang wrote:   > what is this in your family?) using port 9000. You can trace route the > other ip address to see what or who this belongs to. Trace route is a > DOS command.   The 192.168.1.5 IP address belonged to the Sony Playstation. So, for some reason, the port 9000 was being used.   What does this mean though? Is this correct?   Assuming my static public IP address was 1.2.3.4, does this mean that someone, on the Internet, was going to 1.2.3.4:9000, which, somehow (via magic of upnp?) hit my router and then the router "port forwarded" it to the Sony Playstation at 192.168.1.5 at port 9000?

"Paul M. Cook" <pmcook@gte.net>: Dec 24 11:36PM -0500 On Thu, 24 Dec 2015 17:06:18 +0000, Adrian Caspersz wrote:     > If you are that worried about it, why not put the Playstation in your > DMZ and firewall everything else reaching your LAN? Your kid would get > better gameplay that way.   I've heard the word "DMZ" for years, but I really don't know what it is. So, AFAIK, I don't even *have* a DMZ.   My router is set up like most home routers, which is to say the only thing that is not default is the SSID login/password and admin login/password.

Tony Hwang <dragon40@shaw.ca>: Dec 24 09:41PM -0700 Paul M. Cook wrote:   > It's not privacy. > It's just stupidity.   > Or ignorance.   Hiding SSID increases security? Wrong. Not much really. Modem/router combo is always worse than separate router. Put the supplied modem in bridge mode and use your own router. If you can't or ISP won't put in to bridge mode for you , there is another way using DMZ in your modem. I have only DOCIS III cable modem, my router at present is Linksys EA8500 which never went down since I first boot in summer time. Very stable router.

"Paul M. Cook" <pmcook@gte.net>: Dec 25 12:03AM -0500 On Thu, 24 Dec 2015 21:49:08 -0700, Don Y wrote:   > An SSID that's not being broadcast will not disclose your AP when > you're not using it. But, it doesn't buy you much of anything.   I think we're sort of saying the same thing, but, I don't know if we agree on the broadcast details.   We both agree that telling your ROUTER not to broadcast the SSID is a false security measure.   But, fact is, you *must* broadcast your SSID somehow.   a. So, either the router broadcasts your SSID. b. Or your mobile device broadcasts your SSID.   Here's how I understand it to work:   1. Let's assume your SSID is "DonY". 2. Let's assume you told your router *not* to broadcast your SSID. 3. Guess what happens when you boot your laptop? a. Your laptop shouts out "Hey DonY, are you there?" b. Your router answers "Yes. I am here. I was being quiet". c. Your laptop connects to your router by that so-called hidden SSID.   Now, guess what your cellphone does? HINT: Same thing.   So, guess what happens when you boot your laptop at a starbucks? HINT: Your laptop shouts out "Hey DonY, are you here?"   So, in effect, an SSID that is not being broadcast *by your router* at home, is broadcast *by your laptop* both at home, and at Starbucks.   If I'm wrong - someone will explain where - but that's how I understand it.   a. Either the router broadcasts the SSID, b. Or the device does.

Tony Hwang <dragon40@shaw.ca>: Dec 24 10:34PM -0700 Paul M. Cook wrote: > So, AFAIK, I don't even *have* a DMZ.   > My router is set up like most home routers, which is to say the only > thing that is not default is the SSID login/password and admin login/password.   Lots of Googling. Practice makes perfection. Port can be open or closed. When you close a port, something may not work because some ports are used ad default for certain things. ip address is just like unique address, port is like a gate. Even if you are knocking on the right address, if gate is not open, you can't get in(or communicate) Sounds like you are just using the router with default settings. Do you use ad blocker, pop up blocker, etc. on your browser or router?You use W10?

Adrian Caspersz <email@here.invalid>: Dec 25 08:45AM On 25/12/15 04:36, Paul M. Cook wrote: > So, AFAIK, I don't even *have* a DMZ.   > My router is set up like most home routers, which is to say the only > thing that is not default is the SSID login/password and admin login/password.   Well, out of the box is not going to do what you want.   However the WNDR3400v2 does support DMZ configuration. There's loads of netgear, web site and youtube resources to help you do this.   But you must worry about other things. Are you sure letting a child play some of these (mostly violent) video games is a sensible introduction to becoming an adult?   -- Adrian C

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 24 04:48PM -0500 John Heath wrote:   > Interesting foot note. A condenser microphone has a small plastic disk inside that is always + on one side and - on the other. It is a charged condenser that can never be discharged no matter how you try to short it out. The molecules inside the plastic disk are frozen that way somewhat like a permanent magnet.     You are describing an Electret Microphone. It is a subset of Condenser Microphones. The others require a very well filtered high voltage source to keep the condenser charged.

jurb6006@gmail.com: Dec 24 10:00PM -0800 >"differences, particularly in intonation"   By intonation do you mean the same thing as when you set up the neck of a guitar ? On a guitar you basically set the twelfth fret to be exactly one octave up. I do not know about other instruments much. Fretless stringed instruments I guess you can set however you want, but that is not going to be true of brass, wood or wind.   Or are you talking about the harmonics ? The word intonation could be taken as that, and rightly by certain people who are talking about the tonal quality rather than the tone itself. Which is it ?   What's more, is there a way to set intonation, like on a guitar, on saxes, clarinets, and all that ?   I am a bit curious about all this.

John Heath <heathjohn2@gmail.com>: Dec 24 01:56PM -0800 On Wednesday, December 23, 2015 at 7:57:27 AM UTC-5, Adrian Caspersz wrote:   > Happy Days. Had to be quick with the soldering iron or the box would melt :)   > -- > Adrian C   Thanks for the trip down memory lane. 50 cents for the whole kit , that had to be the 1950s or 1960s. And the 1 tube AM radio with a 1T4 tube from your second link. That was way cool.

John Heath <heathjohn2@gmail.com>: Dec 24 02:03PM -0800 On Wednesday, December 23, 2015 at 4:18:46 AM UTC-5, MJC wrote:   > Good demonstration of relationship between charge, voltage and capacity. > (Analogue of skater's pirouette?)   > Mike.   Great analogy. The more I think of it the hands and feet coming in for a faster pirouette is exactly the same.

"Ian Field" <gangprobing.alien@ntlworld.com>: Dec 24 10:03PM "Adrian Caspersz" <email@here.invalid> wrote in message news:ddvk1jF2chjU1@mid.individual.net... > http://my.core.com/~sparktron/130P6.JPG   > I also built the Three Transistor Short Wave Regenerative Receiver kit > http://my.core.com/~sparktron/110P1.JPG   My first transistor SW regen was at boarding school - the cop shop relay antenna was in a compound a few hundred yards from the school grounds, they used SW back then too.............

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