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 Post subject: Zenith Royal 73 project...
PostPosted: Feb Fri 09, 2018 4:15 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5141
Location: Indianapolis, IN
Couldn't pass this radio up for what it cost (Buy It Now) and after arrival today, am glad I got it---worked excellent right out of the box and is in very good shape other than the hinge area & snaps of back cover and a bunch of tiny paint spots.

Think this might be Zenith's last AM-only portable set with tuned-RF amp stage---anyone know for certain ??? It shares the same chassis as the earlier Royal 68 in collection and is made in Hong Kong...

More to come... Ebay pic below

John


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arf r73 ebay pic.jpg
arf r73 ebay pic.jpg [ 235.31 KiB | Viewed 202 times ]
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 Post subject: Re: Zenith Royal 73 project...
PostPosted: Feb Sun 11, 2018 4:57 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 3361
Location: Mountains of Mourne. Ireland.
Image
Image
Sams TSM 106 November 1969
Zenith R73J, R73L, Royal 73J and Royal 73L chassis-9YT57Z9

If I'm not mistaken, Zenith Royal 68 employed chassis-9XT56Z9

Greg.


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 Post subject: Re: Zenith Royal 73 project...
PostPosted: Feb Sun 11, 2018 5:24 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5141
Location: Indianapolis, IN
Hey Greg---you found the same brochure that I did the other day, thanks for posting !

Am almost certain I saw the factory Zenith service info that covered both both models and that they were electrically identical---maybe some slight mechanical differences due to somewhat different control panel ? I looked in my Royal 68 folder thinking I had it, but didn't---so looked online for image and found front page. You are correct about the chassis number differences, but at a glance they do look identical...

John


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arf 68 73 factory front page.jpg
arf 68 73 factory front page.jpg [ 147.09 KiB | Viewed 141 times ]
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 Post subject: Re: Zenith Royal 73 project...
PostPosted: Feb Mon 12, 2018 3:43 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5141
Location: Indianapolis, IN
Spent the day completing this radio...

It required hours to pick off & remove paint specks and "dry clean" the dust in grille slots with toothbrush and vacuum cleaner since panel couldn't be removed from radio (appeared to be glued at top edge). Scrubbed surface of chrome with old cotton sock dampened with Windex. The trim-plate behind volume & tone controls was loose, so removed, cleaned, and re-glued. The tuning side trim-plate lettering and edge paint started to come off, so carefully cleaned with water dampened cloth---but even water started to remove the black stripe around top and right side edges (argghhh !)... Used compressed air to blow dust off of PCB and cabinet...

The radio was already an excellent performer with very good sound, but "tweaking" still made a noticeable improvement.

Few project pics below with the last showing the Royal 68 & Royal 73 together. Basically the same radio with different cabinet styles...

Still curious if this set is the last AM-only Zenith portable with a tuned-RF amp stage---anybody know ?

John


Attachments:
ARF R73 PCB BOT.jpg
ARF R73 PCB BOT.jpg [ 227.13 KiB | Viewed 124 times ]
ARF R73 CAB INS CLN.jpg
ARF R73 CAB INS CLN.jpg [ 239.18 KiB | Viewed 124 times ]
ARF R73 INS CLN.jpg
ARF R73 INS CLN.jpg [ 242.22 KiB | Viewed 124 times ]
ARF R73 CVR INS CLN.jpg
ARF R73 CVR INS CLN.jpg [ 216.64 KiB | Viewed 124 times ]
ARF R73 CMPLT.jpg
ARF R73 CMPLT.jpg [ 204.17 KiB | Viewed 124 times ]
ARF R68 R73.jpg
ARF R68 R73.jpg [ 186.52 KiB | Viewed 124 times ]
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 Post subject: Re: Zenith Royal 73 project...
PostPosted: Feb Wed 14, 2018 3:54 am 
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Joined: Mar Sun 30, 2008 1:45 am
Posts: 160
Location: Oakland Township, Michigan
Sharp looking! When were those radios produced John?

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Matt - WY8R
http://www.smokypond.com/gallery/main.php


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 Post subject: Re: Zenith Royal 73 project...
PostPosted: Feb Thu 15, 2018 2:29 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5141
Location: Indianapolis, IN
Thanks Matt---Not certain, but think the Royal 68 came out in late '67 and the Royal 73 in '68 from what date-codes and advertising I could find. If anyone knows for sure, please post !

John


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