Some info on broken gears cogs on the Magnavox D8443 and Aka

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baddboybill

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Guys some info was passed to me by another member here and I have verified it to be true. The Magnavox D7140 and 7240 mono box has same cog gear but seams to be made little stronger than one in D8443. So not only do we have choice to buy the new manufactured one from VintageVolts but you can get the mono box for less than $20 and deck parts are almost 100% same minus motor, mono head and key covers :-)
 

baddboybill

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I'm glad you were able to locate one Bill. :thumbsup: They are hard to find. I found one a year ago and can't seem to locate another, but you did. :lol:


There actually a 7140 right now on eBay as well :thumbsup: Thanks for info Alberto ;-)
 

baddboybill

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Went looking for it on ebay, can't find it. Must be sold.


I think it just ended with no buy the other day :yes: There's another member on S2G that I believe is also trying to make a gear. I know he made one for the Philips D8614 that is another problem gear :-)
 

frontside5

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May 19, 2013
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superlew said:
The deck issue with the gear is the reason I have continually shied away from the D8443.
Same. There are so many it's tempting to get one to expand my new collection quickly. Is the re & re straightforward on this unit?
 

baddboybill

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Here are 3.....
http://www.ebay.com/itm/Vintage-Magnavox-AM-FM-Radio-Boombox-Tape-Player-model-D7140-/230986008916?pt=LH_DefaultDomain_0&hash=item35c7d6c954
http://www.ebay.com/itm/Magnavox-d7140-cassette-player-/130912277380?pt=Vintage_Electronics_R2&hash=item1e7afad384
http://www.ebay.com/itm/Magnavox-D7140-vintage-radio-cassette-deck-good-condition-working-order-/271206122146?pt=Vintage_Electronics_R2&hash=item3f252502a2
 

Ghettoboom767

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I bet when I open mine up the cassette gear will probably be bad?!
All works but cassette on my 8443.
Thanks for the info Bill!:)
 

Alberto

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Jan 3, 2013
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baddboybill said:
Guys some info was passed to me by another member here and I have verified it to be true. The Magnavox D7140 and 7240 mono box has same cog gear but seams to be made little stronger than one in D8443. So not only do we have choice to buy the new manufactured one from VintageVolts but you can get the mono box for less than $20 and deck parts are almost 100% same minus motor, mono head and key covers :-)
The Magnavox I mentioned to you that had the stronger gear was the D7240. I also purchased a D7140 and it had the same crappy gear as the D8443. When I pulled the gear from the D7140 it came out ok, but crumbled in my hands. The gear from the D7240 must be made from a different material, it is much stronger and is still working well in my Magnavox D8443. It is the gear from the "D7240" that you want to get. :thumbsup:
 

Jorge

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Jul 12, 2017
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square-2.com
Here is how it looks inside D7240, still intact:


and pulled out:


With helical gears there is an extra step when 3D modeling, hope I will get the angle right:


Hope someone beats me to it, refreshing AutoCAD skills is physically painful at my age! :-/
 

Trommelmops

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Apr 20, 2017
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Ah ok.

I see the problems only in to digitalise

If I had all correct measurements it could be laser sintered.....like the gearwheels I made for superduper......

Is there anybody who has a broken gearwheel which Can send to me that I can digitalise it by myself? The material looks like the jelly from the gearwheel for the M90 function switch
 

Trommelmops

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Little update:

I have contacted my network esp. my joker :-D

If i had a wheel here, we would digitize it.... This is no challenge for us :-) and after that

we would laser sinter some wheels....... :yes:

you need a little patience but the result is what count....
 
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