- Does Max mean max signal or max attenuation? - 6 Updates
- Repairing a 5 VDC adapter - 1 Update
- Tantalum Capacitors - 2 Updates
| micky <NONONOmisc07@bigfoot.com>: Oct 03 03:47PM -0400 I have a Radio Shack signal Attenuator with F connections on each side. It also says Min and Max and different ends of its rotation. Does Max mean max signal or max attenuation? Testing doesn't seem to show this, because the tv signal will disappear when the signal is too weak, but also when it is too strong. |
| "Dave M" <dgminala@mediacombb.net>: Oct 03 04:58PM -0500 If, when you say "different ends of its rotation", you mean that it is a variable attenuator, then the Min attenuation spec is the lowest attenuation setting, meaning that maximum signal gets through. Max attenuation means that is the highest level of attenuation, with the least amount of signal getting through. To reduce the signal level more, rotate the setting toward the Max end. Dave M micky wrote: |
| M Philbrook <jamie_ka1lpa@charter.net>: Oct 03 09:09PM -0400 In article <a3c01btt8jdvvcvg4hv74aou74ul7bb1sq@4ax.com>, NONONOmisc07 @bigfoot.com says... > Does Max mean max signal or max attenuation? > Testing doesn't seem to show this, because the tv signal will disappear > when the signal is too weak, but also when it is too strong. Attenuation is reduction, Max Att would be max reduction in signal gain! At least that is how I read it, who knows, it was radio shaft product. Jamie |
| thekmanrocks@gmail.com: Oct 03 06:18PM -0700 Micky: If it is a know, then maximum attenuation would be fully counter-clockwise. Minimum attenuation would be fully clockwise. In the case of an audio amp attenuator knob, at 12 o'clock would be some attenuation and a moderate input voltage to achieve a specific desired volume level. Fully clockwise would mean zero attenuation, requiring minimal input signal voltage to achieve that same desired volume level. The latter circumstance ensures that no clipping occurs at the output stage of the signal source(assuming that signal wasn't already clipped or limited during production or from a prior stage). |
| "Tom Miller" <tmiller11147@verizon.net>: Oct 03 09:28PM -0400 "micky" <NONONOmisc07@bigfoot.com> wrote in message news:a3c01btt8jdvvcvg4hv74aou74ul7bb1sq@4ax.com... > Does Max mean max signal or max attenuation? > Testing doesn't seem to show this, because the tv signal will disappear > when the signal is too weak, but also when it is too strong. With one end open measure the DC resistance of the other end. Once at max and once at min. Report the values here. |
| micky <NONONOmisc07@bigfoot.com>: Oct 03 09:37PM -0400 In sci.electronics.repair, on Sat, 3 Oct 2015 21:28:10 -0400, "Tom >> when the signal is too weak, but also when it is too strong. >With one end open measure the DC resistance of the other end. Once at max >and once at min. Report the values here. good idea. especally since the vote was 2 to 1 so far. It will take a while to get back to you all. Thanks everyone. |
| Fred McKenzie <fmmck@aol.com>: Oct 03 06:34PM -0400 In article <121bf545-b9df-4956-ad49-48e03aeb36f3@googlegroups.com>, > amps which the generic adaptor could not supply. Plus, if the slide switch > was ever set at 9V = instant destruction of the player OR if the puny > transistor inside got too hot and failed short = same result. Current measured at the input to the regulator varies around 55 to 60 mA. This includes 5 or 10 mA for an LED pilot light. I changed to a 1/4 Amp fuse because that was the smallest I have. I am not using the original lighter plug, but built it into an Altoids can. It should be easy to fit a 78L05 into the original plug, but the plug plus socket is bulkier than the Altoids can. Fred (I do not especially like Altoids, but the cans are worth it!) |
| Piotr Wyderski <peter.pan@neverland.mil>: Oct 03 09:31PM +0200 John Larkin wrote: > The polymer aluminums are really good. Low leakage, low ESR, don't dry > out. Do they exist in the upper mF range (4700+uF) for, say, 35V? Best regards, Piotr |
| John Larkin <jjlarkin@highlandtechnology.com>: Oct 03 01:02PM -0700 On Sat, 3 Oct 2015 21:31:00 +0200, Piotr Wyderski >> out. >Do they exist in the upper mF range (4700+uF) for, say, 35V? > Best regards, Piotr Check the distribs, but I think not. The CV products seem low, like 4700 at 2.5v. Don't know why. |
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