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In Reply to: RE: Homemade Variovac posted by email@example.com on April 04, 2017 at 08:49:09
I'm not the one to make recommendations on electronics but I'll pass along something I read for a DIY inexpensive voltage drop. Find a short extension cord, something like 6' or so. Separate a short section of the two leads and cut one. Trim the insulation back and wire in a standard light socket. Insert a 30-40 watt bulb. Connect the component to be turned on and the cord to the wall. This will not be variable but will reduce voltage passing to the device. If this is a valid method maybe someone can suggest how long this should be left on before reconnecting the component directly to the wall?
Even buying new parts should cost only a few dollars, not $110.
"The piano ain't got no wrong notes." Thelonious Monk
Edits: 04/04/17Follow Ups:
is used to power up a piece of electronics which has been in storage for a long period of time, to allow the capacitors to reform, hopefully without self-destructing.
That ebay bucking transformer is meant for constant use, to drop the AC wall voltage from today's higher averages (> 120 VAC) to 110 or 115 for devices which were designed to use lower voltages.
You're right that someone could DIY one for themselves fairly inexpensively if they know which end of the soldering iron gets hot, and feel safe with wiring projects.
thanks you guys for all the info. I do have a nice Variovac I bought a few years ago. I have slowly warmed up old vacuum tube stuff but never thought about the outlet voltage.
That Variovac, the home made one, caught my eye when the builder told why he made it.
I have 2 nice Dynas I love but they have a small hum to them. I have tried losts of experiments and even bought a Emotiva power strip with 2 outputs to solve things. Out of all the answers I got from another forum no one mentioned the correct voltage from the wall outlet, even Van Alstine who suggested his devise which is like the Emotiva, the HumDinger.
So unless I get (don't waste your time) from someone I'm going to hook that Variovac up at 115 volts and report to you all on my audible findings. Theres no wrestling on tonight so it will give me a little project to do.....thanks you all...Mark K.
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