Author Topic: Webcor Ravinia, Looking For Help Learning How To Work On It And...  (Read 481 times)

Hibs06

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Hello,

I recently purchased a refurbished Webcor Ravinia and live in Sonoma County, CA.  I'm looking for help on learning how to do standard maintenance on it (when/how to oil turntable, standard tuneups to do) and also looking for someone who works on these in my area should more complex repairs arise in the future.  Does anyone have any suggestions for either?

TC Chris

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Re: Webcor Ravinia, Looking For Help Learning How To Work On It And...
« Reply #1 on: December 07, 2017, 06:45:45 PM »
Whew, that's a tall order.  As to the electronics, maybe find an old introductory tube electronics text, or maybe something from the ARRL, the ham radio organization.  They had publications that explained electronics fundamentals so people could learn and pass the FCC exams.  And read threads on this site, or over at Antique Radio Forums  (http://antiqueradios.com/forums/).

The mechanical turntable doesn't usually require lots of attention once you have dealt with removal and replacement of the old oxidized grease and maybe lubed the motor bearings.  Again, follow threads here, and find manuals for your record changer. Then work carefully and gently.  The usual rule for lubrication is counterintuitive:  less is more.  People sometimes get carried away squirting lubricants everywhere.  Excess lube attracts dust, migrates where you don't want it, and makes a mess.  We all tend to think that if a little is good, then more is better, but it ain't necessarily so.

One warning is to be aware that there are high voltages involved in tube electronics, and even in some solid-state devices.  This is not something to be terrified of, but it is something to remember and respect.

Chris Campbell

HiFiFun

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Re: Webcor Ravinia, Looking For Help Learning How To Work On It And...
« Reply #2 on: December 08, 2017, 11:39:09 AM »
Welcome to the forum.

Research if there is an antique radio club near
you. Many times they will mentor new members,
or have basic electronics classes for members.
Edit:
http://www.californiahistoricalradio.com/

They do offer classes, look down at the bottom
of their membership form.

I recently had a friend help me with a
Webcor Ravinia. They have a hybrid PC board
pre-amp, AM/FM radio chassis and power amp
chassis. Vacuum tube based circuits.

Removing these components from the cabinet
alone actually requires two people for best results.

If you need the schematic, I will be happy to
supply it to you.

As TC Chris posted, you must learn the safety basics
well first, then proceed with learning how to read a
schematic, functions of components, organization of
electronic circuits, and so on.

If you organize your learning, you will be very satisfied
when you successfully complete your first project.

The Ravinia is not a good project for newbies.
But, with a knowledgeable mentor, you could assist
them with the restoration
.
Let us know the course you want to take.
There are many websites and videos you can
start with.

Buy an RCA or other brand vacuum tube manual to start
off your electronics library. It is a basic book to
have for reference.
HFF

Hibs06

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Re: Webcor Ravinia, Looking For Help Learning How To Work On It And...
« Reply #3 on: December 11, 2017, 05:37:08 PM »
Wow!  Thank you so much for replying and the great information here.  Lots to look at and start with.  HiFiFun, I would love the schematics if it's not to much trouble.