what might be missing on this color wheel

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what might be missing on this color wheel

Post by Art Hoch on Sat Jul 06, 2013 10:16 am

I have a very nice Amer. Bosch 670C console that I'm trying to figure out the band switch/color wheel connection.  The band switch/shaft has a brass or bronze wheel on it that connects to the color wheel above it.  In doing so, the color wheel indicates which band the radio is playing through a small window on the dial.  I know originally this setup included a metal cable connecting the two.  It became AWOL.  Now I'm trying to figure out how to make it work correctly.  Does anyone in this forum have one of these that can show me the way?  

I've tried on 2 other forums to find help but nothing really so far other than "try a spring."  But where?

Is there a way to attach pics in this forum?

Any help would be appreciated.
Thanks,
Art Hoch
07.06.2013
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Re: what might be missing on this color wheel

Post by 75X11 on Sat Jul 06, 2013 2:11 pm

Most of us use a photo hosting site to attach pictures. I use ImageShack. It automatically sizes the pic to an acceptable dimension for posting.
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Re: what might be missing on this color wheel

Post by Art Hoch on Sat Jul 06, 2013 10:50 pm

Does this work?  I would like to know what is missing on this Amer. Bosch colorwheel.
Art
http://imageshack.us/photo/my-images/35/mwi4.jpg/
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Re: what might be missing on this color wheel

Post by 75X11 on Sun Jul 07, 2013 12:09 am

To the right of the image are two links. Press links to embed this image, choose the one for forums, left click it, then right click it and press copy. then when you want to attach it, left click and press paste. it will then attach and show the image with the post.
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Re: what might be missing on this color wheel

Post by 75X11 on Sun Jul 07, 2013 12:16 am

As for the color wheel itself, is it basically a pulley driven indicator of the shaft that drives the switch? Does the other portion also have a indexing pin like the bushing on the color wheel?
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Re: what might be missing on this color wheel

Post by Art Hoch on Sun Jul 07, 2013 10:05 am

http://imageshack.us/a/img90/5253/7nox.jpg

The wheel on the shaft is not a pulley in the normal sense.  It only turns when the shaft is turned.  It has no pin
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Re: what might be missing on this color wheel

Post by 75X11 on Sun Jul 07, 2013 10:57 am

Each are excellent photos. I've searched for any info on how the cabling is routed and the only definite things I can find is that two cables are in the parts list for that assembly and one spring. If someone could be persuaded to open theirs and get some pics, you could make the cable using steel fishing leader cable. I also saw an expired ebay listing for a factory service guide for your radio model. If someone had one of those in their library, it could help.
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Re: what might be missing on this color wheel

Post by Art Hoch on Sun Jul 07, 2013 4:17 pm

Michael Feldt (http://www.indianaradios.com/American%20Bosch%20670T%20Radio.htm) has an American Bosch 670T tombstone in his collection.  He states the tombstone uses the same chassis as does my console.  I emailed him re: taking a picture of the cable assembly on that radio last week but have had no response.  Al Adams, Adams Manufacturing Co., dial string maker, graciously sent me some free bronze cable, so I think I have the material if I could just find out what I'm missing.  Al did not have a diagram nor instructions.  The dial string book (Sams) I have is too late for this 1936/37 model.  So I'm up a creek unless someone can provide me with more information.  I was informed about the parts list which shows two cables and a spring.  My Riders did not have that info in it.  In fact several pages, including the United American Bosch section, are not in my book.  Don't know what became of them.  That makes it a bit more challenging!
Art
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Re: what might be missing on this color wheel

Post by 75X11 on Sun Jul 07, 2013 4:46 pm

I have a DVD-ROM with the Riders collection on it. The parts list is in vol.7 United Bosch 7-41. You never know, it just may take a little while before a more fortunate owner would open their unit up to get some pics. I would bet that factory service guide would have a diagram If someone could locate it and possibly scan it.
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Re: what might be missing on this color wheel

Post by Art Hoch on Sun Jul 07, 2013 11:02 pm

That would be GREAT!  I've been trying other arrangement(s).  Like a really snug rubber O ring and sandpaper on the color wheel hub.  Just not satisfactory.Sad
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Re: what might be missing on this color wheel

Post by Art Hoch on Mon Jul 08, 2013 12:05 pm

Does anyone know someone who has a 670T (tombstone) or a 670C (console) that I may contact?
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Re: what might be missing on this color wheel

Post by Art Hoch on Mon Jul 22, 2013 6:06 pm

Good news; Problem solved.  Needed a bronze cable.  Bad news; I killed it----radio won't play like it did before.Evil or Very Mad *Sigh*  Back to the drawing board.  Silent except when I touch the 6F5 tube.  Then a loud hum.  Zounds!
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Re: what might be missing on this color wheel

Post by 75X11 on Mon Jul 22, 2013 7:44 pm

If it tain't one thing it's gotta be another! At least that is what my grandfather used to say. He would fix everything but radios and televisions. He always said a man could get killed doing that. I think a radio bit him once. affraid 
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Re: what might be missing on this color wheel

Post by Art Hoch on Tue Jul 23, 2013 1:01 pm

75X11,
That's called taking "smartn' pills!Razz
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Re: what might be missing on this color wheel

Post by Art Hoch on Thu Aug 01, 2013 7:20 pm

This can be locked.
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Re: what might be missing on this color wheel

Post by Wildcat445 on Thu Aug 01, 2013 8:44 pm

If this thread is locked, we may never know what killed your radio. Inquiring minds would like to know. Is there a good reason to keep us in suspense?

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Re: what might be missing on this color wheel

Post by Bill Cahill on Thu Aug 01, 2013 11:59 pm

This thread isn't locked. You were able to post.

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Re: what might be missing on this color wheel

Post by Wildcat445 on Fri Aug 02, 2013 12:10 am

The OP stated that whatever he did to his radio, killed it. What killed it? I am interested in his project, and would like to know. The OP requested that the thread be locked. I realize that it was not locked, since I was able to post. I was making a feeble attempt at being nosy and asking the OP what he found wrong with his set. Sorry for the misunderstanding, Bill.

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Re: what might be missing on this color wheel

Post by Bill Cahill on Fri Aug 02, 2013 12:32 am

I'm not upset. I wish he would also come back. We should be able to help him.

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Re: what might be missing on this color wheel

Post by Art Hoch on Thu May 22, 2014 11:05 pm

Think I lost a cap buried up inside the chassis.  It's H E double L to get to.  I just haven't gotten into the right mood to tackle it again.  There are "loose" sections in the chassis held in place by a long band switch shaft.  A person just about needs 3 or 4 hands to work on it; i.e. unsolder the wires while manipulating the rest.  Maybe someday.......
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Re: what might be missing on this color wheel

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