If you check some of the pictures on the DECWARE speaker repair pages, you will see a bottle of this glue next to the speaker.For cleaning off the old glue and bits of old surround, as well as forsoftening the glue around the dust-cap so it can be non-destructivelyremoved for cleaning the voice coil gap and shimming the voice coilwhile replacing the surround, the following solvent works great:"Oatey Cleaner for CPVC or PVC or ABS - Clear", 16 oz can, white and yellow label.
While the reasons this is not trueshould be obvious from other sections of this document, some would still callworrying about such issues as the direction of the monitor nonsense.(From: Bob Myers ([email protected]).)No, it's not nonsense.
The holes in the mask move to a different place and the projectionsof the electron beams will land on the wrong colours: purity errors.The use of invar allows about 3 times more beam current for the samepurity errors.
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It is strongly recommended that you do not twiddle any screwdriver adjustments on the IF transformer cans or elsewhere in the set unless you know exactly what you are doing.
This isnot much different than modern equipment except for the bites the relativelyhigh voltages can take out of your hide.There are some links in Sam's Neat, Nifty, and HandyBookmarks to vacuum tube information and troubleshooting.Additional comments on old equipment restoration(From: Carl Ratner ([email protected]).)A good place to post problems is rec.antiques.radio+phono.
A frequency around 400-1000 Hz should work well.Then, adjust the speed while listening to this same source simultaneouslywith the tape being played back on the unit to be adjusted.
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Use a plastictool to avoid shorting out something!) However, keep inmind that any tapes you recorded on this machine (assuming it can record)recently will play at an incorrect speed once you adjust the speed.Is it slow and steady - no more wow and flutter than normal?
However, the "pentagonal" or "Pentalobe" head screws require a special tool, readily available for less than $1 on eBay and elsewhere.The battery is next easiest to replace, requiring removal of the rear cover and then the battery connector (2 screws), pop off connector.
Where the unit appears dead, test as with AC line powered digital clocks (see the section: AC powered digital clock problems). repair ceiling cracks before painting
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A neon light bulb (NE2) can be used to test for this if a multimeter is not available.When off-hook (dialing or talking), there will be a DC voltage of approximately 5 to 15 V between Tip and Ring.
With some CRTs, thephosphors are arranged in triangular formations called triads with each ofthe color dots at the apex of the triangle.
Sometimes, this can work to your advantageenabling you to upgrade to a fancier model for the cost of the parts.Some general referencesHere are some suggested titles that might be found in your local publiclibrary or a technical bookstore.Troubleshooting and Repairing Electronic Circuits Robert L.
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