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 Post subject: Magnavox Collaro changer
PostPosted: Mar Fri 02, 2018 1:51 am 
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This is part of a Magnavox radio / phonograph. Reading between the lines, the changer was made by Collaro for Magnavox. The changer looks like this one, but with a Magnavox badge:
https://www.radiomuseum.org/r/collaro_54.html

Note the lever at the front of the tonearm for switching between 78 and LP. (A fairly conventional approach)
Attachment:
RC54_needle-select.jpg
RC54_needle-select.jpg [ 5.79 KiB | Viewed 458 times ]

What we have in the Magnavox version is this:
Attachment:
cartridge.jpg
cartridge.jpg [ 98 KiB | Viewed 459 times ]

Instead of turning the cartridge withing the headshell, there is a "thumbwheel" that rocks the cartridge in line with the tonearm, bringing 2 different needles into play. The bottom view shows the two needles:
Attachment:
cartridge_bot.jpg
cartridge_bot.jpg [ 89.61 KiB | Viewed 459 times ]

In this unit, the cartridge does not respond to the "scratch test". I've never seen on like this before and I don't know if is reluctance, ceramic, crystal, or.....

Anyone have any clues?

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 Post subject: Re: Magnavox Collaro changer
PostPosted: Mar Fri 02, 2018 2:13 am 
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Most Magnavox changers were made by Collaro. Magnavox eventually purchased the Collaro company.

The cartridge is most likely crystal and most probably dead!

-David


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 Post subject: Re: Magnavox Collaro changer
PostPosted: Mar Fri 02, 2018 2:27 am 
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Any ideas what cartridge we might use?

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"It's always something". --Gilda Radner (1946 - 1989)


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 Post subject: Re: Magnavox Collaro changer
PostPosted: Mar Fri 02, 2018 4:58 pm 
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Those tilting cartridges (Philco had something similar) present a particular challenge because there is no modern cartridge anything like them. Most people would probably try to adapt a P228 or something like it. Gary at www.thevoiceofmusic.com would be a good resource.

-David


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 Post subject: Re: Magnavox Collaro changer
PostPosted: Mar Fri 02, 2018 5:05 pm 
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I am coming to the same conclusion......and, yes, Gary is my next stop. So far, he has solved 100% of my R/P issues.

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"It's always something". --Gilda Radner (1946 - 1989)


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 Post subject: Re: Magnavox Collaro changer
PostPosted: Mar Sat 10, 2018 3:37 am 
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FWIW those plug in Collaro Head Shells are available with the more conventional mounting screw type arraignment which would make fitting it with a different cartridge a lot easier.


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 Post subject: Re: Magnavox Collaro changer
PostPosted: Mar Sat 10, 2018 11:35 am 
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Eric H wrote:
FWIW those plug in Collaro Head Shells are available with the more conventional mounting screw type arraignment which would make fitting it with a different cartridge a lot easier.

Indeed....I have seen pictures of these. Do you know a source?

( I have discussed how to proceed with Gary at V-M, but this option did not come up.)

EDIT--- seeing some on EBay, but not have not yet confirmed what model(s) they fit.

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"It's always something". --Gilda Radner (1946 - 1989)


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 Post subject: Re: Magnavox Collaro changer
PostPosted: Apr Mon 30, 2018 5:39 pm 
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I got a cartridge kit from VM.....that was the easy part. (As always, Gary was super helpful.)

I just finished the mechanical overhaul. I did a complete disassembly to make cleaning and lubrication easier.
DO YOU KNOW HOW MANY PARTS THIS THING HAS.???!!! Seems like 2x any other changer I have worked on.

Pretty routine except for a special screw that I had to make...and I have no parts left over...;)

I'll eventually post a few pictures....

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