Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: Contributors :: Advertise


It is currently Dec Tue 11, 2018 4:14 am


All times are UTC [ DST ]





Post New Topic Post Reply  [ 8 posts ] 
Author Message
 Post subject: Widespread panic on a Zenith 705
PostPosted: Feb Mon 19, 2018 3:37 am 
Member

Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1493
Hello Transistor radio world. Here's an upcoming project that I acquired on Friday. A well used, and significantly beaten Royal 705. When powered I was relieved to get sound, though only on a very few (like two) powerful local stations. Nice to have a working power switch and volume control, without even squirting it. Though I had to turn it all the way up to get any volume out of even a powerful station, the sound quality was very very good for such a small little thing. Overall pretty dirty and dinged up and the grille will need some "hammer and dolly" work. The antenna was broke at the end of the support and I figured that was fixable. Then looking at the the inner panel sticker more closely I realized the antenna was supposed to be longer than that, even if it was glued back together. In horror I saw the other side was broken too, but appeared to be missing. Nothing rattling around in there either. So I figured if that piece is gone this project is dead in the water before it starts. But looking at the schematic I saw that all the wires were still in there, so I figured maybe when it broke it got stuck to the speaker magnet. Couldn't see without taking the chassis out, so I got the four small hex screws out, and the knobs. But the thing still wouldn't come out. It took a while to discover there was some kind of "cyst" on the VC spindle that was preventing it from sliding out of the seemingly high tolerance hole in the front panel. Using a very small file to get in there, I was able to smooth the cyst out enough to set it free. And sure enough the other end of the ferrite was clinging to the speaker magnet! Maybe this radio has some hope now. This one may have to wait until after taxes get done, but I will at least try to get the antenna in order and give it another performance check.


Attachment:
IMG_1806.JPG
IMG_1806.JPG [ 143.84 KiB | Viewed 909 times ]



Attachment:
IMG_1803.JPG
IMG_1803.JPG [ 111.23 KiB | Viewed 909 times ]



Attachment:
IMG_1805.JPG
IMG_1805.JPG [ 136.63 KiB | Viewed 909 times ]



Attachment:
IMG_1804.JPG
IMG_1804.JPG [ 136.08 KiB | Viewed 909 times ]



Attachment:
IMG_1810.JPG
IMG_1810.JPG [ 122.65 KiB | Viewed 909 times ]



Attachment:
IMG_1808.JPG
IMG_1808.JPG [ 93.08 KiB | Viewed 909 times ]



Attachment:
IMG_1809.JPG
IMG_1809.JPG [ 99.88 KiB | Viewed 909 times ]


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Mon 19, 2018 3:44 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 12749
Location: Omak,wa,usa
Hello metzman,
you have your work cut out for you on this set


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Mon 19, 2018 8:00 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 29454
Location: SoCal, 91387
Nice little project, and I don't see any real difficulties.

Use crazy glue on the Ferrite, do a recap on the ample size board, touch up the IF's and antenna gang trimmer, and you're in business!

_________________
\\\\\\\\\\\\\\\\\\\\\\\\He Who Dies With The Most Radios Wins//////////////////


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Tue 20, 2018 1:45 am 
Member

Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1493
Hello Hello Hello. Today I successfully glued the antenna and have this radio functioning great. Plenty of sound, selection, and sensitivity. Haven't changed any caps or done alignment. I may just leave it the way it is for now. Leave it battle worn and use it for long distance ball games this spring. It's not the greatest looking radio, but that deep dish speaker really makes it worth listening to!


Sorry for the sideways pictures. They were vertical when I took them. ARF changed them on me. The screwdrivers are adding weight whilst the glue dried.


Attachment:
IMG_1811.JPG
IMG_1811.JPG [ 105.26 KiB | Viewed 809 times ]



Attachment:
IMG_1812.JPG
IMG_1812.JPG [ 89.87 KiB | Viewed 809 times ]



Attachment:
IMG_1813.JPG
IMG_1813.JPG [ 98.99 KiB | Viewed 809 times ]



Attachment:
IMG_1816.JPG
IMG_1816.JPG [ 101.38 KiB | Viewed 809 times ]


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Tue 20, 2018 2:02 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 29454
Location: SoCal, 91387
Congrats! A little glue can go a long way... :wink:

_________________
\\\\\\\\\\\\\\\\\\\\\\\\He Who Dies With The Most Radios Wins//////////////////


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Tue 20, 2018 3:39 am 
Member

Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1493
Thanks! At first I thought it was a goner. Now I'm thinking it may be a good candidate for a "electrolytic cap restuffing practice project". :)


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Tue 20, 2018 4:00 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5557
Location: Indianapolis, IN
Hey Metzman---glad that the ferrite antenna rod went together well ! Have been through that situation a few times myself lately with various sets...

Also great that your volume control was good !

Just knew that you would like it---these are fantastic, under-appreciated sets with great performance and sound quality. Think I've mentioned several times that they were probably my favorite AM-only radio (to use & listen to) and have one in family room as my "regular"... A little "tweaking", especially on the ANT & RF trimmers may amaze you ! Oldies music really sounds great on 'em too...

Now you need to find a couple cheap "spares" to refurbish...

John


Top
 Profile  
 
 Post subject: Re: Widespread panic on a Zenith 705
PostPosted: Feb Tue 20, 2018 5:47 am 
Member

Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1493
Quote:
these are fantastic, under-appreciated sets with great performance and sound quality.


I agree. Very utilitarian looking, but they really pack a punch. I'm sure when fine tuned they're phenomenal. I definately recommend this model.


Top
 Profile  
 
Post New Topic Post Reply  [ 8 posts ]  Moderator: Dave Doughty

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 7 guests



Search for:
Jump to:  
























Privacy Policy :: Powered by phpBB