Tip & How-To about Radio Communications

Low pass Rf filter

Build your own Rf filter for your output. Wind about 6 turns of enamel coated wire on a straw about "1 inch. Insert a round piece of iron in the center or Iron core(ferrite). Insert capacitors 10-30pf before coil to ground and after coil to ground. I insert 2 capacitors before coil and 2 after coil to ground. The principle is to shunt stray Rf to ground through the capacitors. At the Antenna side add a 100ohm resistor. Its a small Rf filter that should lower SWR and shunt stray Rf to ground, to keep RF from bleeding into Electronics, Neighbors stereos,Tv's and keeps it within all legal power. Use an SWR meter when building this(I recommend a small metal box with 2 female adaptors and a 6" inch Jumper coax.) Get the SWR between 1.1 to 1.5 swr and lock it down. This should also protect you from Lightning and save your transmitter. Ground the metal box heavy to Metal filing cabinets or waterpipes,meterbox, or a 6 ft. rod into earth. Label your box "TX In" and the other end "Antenna"(ANT). Rememeber to use 100 to 500 ohm resistor at Antenna end. Spread coil for max power output and lowest SWR.

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What are the dimensions of t his dutch oven?


According to Amazon, the dimensions are as follows: 15 inches in length, by 13 inches in width, by 9 inches in height/depth. It also weights 13.8 pounds.

Feb 16, 2014 | Tramontina Gourmet Dutch Ovens: Enameled...

2 Answers

jbl roxy over ear headphones ref 430 need to install new cord. how do i open cans?


Hello.
Headphone speakers stop functioning properly when the wireconnections to the speaker are broken. This problem often develops when theheadphone cord gets jerked while being worn. The solder connection might alsodetach over time if it was not properly manufactured. The wire can bereconnected to the speaker with a soldering iron to repair the headphone. Beaware, though, that headphones are not designed to be user maintained in thisfashion. In some cases, it is difficult to get to the speaker due to the casingdesign.
Instructions and tools needed
Screwdriver or butter knife (depending on headphone design),Soldering iron, Electrical solder
1 Plug in the solderingiron. It takes a few minutes for it to get warm enough to be used.
2 Unscrew the screws holdingthe headphone casing over the speakers. This step applies only to models thatuse screws in the casing.
3 Insert the end of the butterknife into the seam on the headphone ear pieces. Pry the two halves of thecasing apart. This step is performed only on headphone models that do not usescrews in the casing.
4 Touch the tip of thesoldering iron to the electrical solder. A small drop should melt onto the tipof the iron.
5 Touch the tip of the soldering iron to the end of thedetached speaker wire inside the headphone speaker cavity. Try to get an evencoating of solder around the exposed metal end of the wire. The soldersolidifies on the wire once the soldering iron is removed.
6 Touch the end of the wire tothe solder on the metal tab attached to the speaker.
7 Touch the tip of the solderingiron to where the wire and tab connect. The heat of the soldering iron meltsthe solder on the wire and tab together. This repairs the broken connectionbetween the wire and speaker.
8 Replace the speaker casingonto the headphone. It should snap back into place for models without screws Thanks.

Sep 22, 2011 | JBL Reference 420 On-and Over-Ear...

1 Answer

fdw fault eco and fast flashing


I had a hotpoint engineer try to fix this type of problem.
He insisted that there was something stuck in the bottom of the pump.

Sure enough there was.
1. Unplug your dishwaser at the wall.
2. Remove the grill under the bottom rack.
3. Ensure that the filter is free from food and other obstacles and clean the filter.
4. Before replacing filter etc, get a piece of metal coat hanger wire and care fully insert it down the channel under the filter to free any lodged items. You may also see a small white impleller try to turn this with your finger or the coat hanger wire (this is the info from the engineer!).
5. replace filter and retry a wash.

This routine fixed or machine twice and will hopefully fix yours!

Don't forget to rate me!

Sep 02, 2009 | Hotpoint 24 in. FDW60 Free-standing...

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microwave enamel wearing away


It will have to be sanded smooth and clean and dried thoroughly.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

Enamel should work, but appliance paint is better.

We're happy to help and we appreciate your thoughtful rating of our answer.

Jun 20, 2008 | GE JVM1650 1000 Watts Microwave Oven

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