Oxford model 690

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Oxford model 690

Post by Guest on Fri Mar 07, 2014 12:37 pm

Fixed this mini radio yesterday;







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Re: Oxford model 690

Post by 75X11 on Fri Mar 07, 2014 1:30 pm

nice looking radio, inside and out!
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Re: Oxford model 690

Post by Guest on Fri Mar 07, 2014 1:34 pm

I used the can of soup to give perspective of the small size.

It has an RF amp stage with additional 12BA6. If you look at the tag you can see 6 tube right on it. I took all 3 photos at the same time (with a camera) but not sure why to look so poor.

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Re: Oxford model 690

Post by 75X11 on Fri Mar 07, 2014 2:19 pm

I think the third came out well because you took it at an angle and the camera didn't get much glare. The digital film is so cheap these days (  Very Happy) I take several pics and pick the best of each aspect.
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Re: Oxford model 690

Post by Wildcat445 on Fri Mar 07, 2014 2:29 pm

I like it.  cheers 

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Re: Oxford model 690

Post by Guest on Fri Mar 07, 2014 4:58 pm

It also has wire wound 1% resistors!

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Re: Oxford model 690

Post by Guest on Fri Mar 07, 2014 6:20 pm

A little better chassis photo


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Re: Oxford model 690

Post by Guest on Fri Mar 07, 2014 6:22 pm

maybe a bit better yet


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Re: Oxford model 690

Post by 75X11 on Fri Mar 07, 2014 7:28 pm

I've not seen tube retainers like those before. Thinking of Ebay shipment, I wish more radios used them.
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Re: Oxford model 690

Post by Guest on Fri Mar 07, 2014 7:40 pm

I wonder why it's only on two of the tubes?

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Re: Oxford model 690

Post by Bill Cahill on Fri Mar 07, 2014 8:05 pm

Because some are missing. That's a Japanese radio, and, they used the wire retainers to keep the tubes in. Nice radio............ It'd make a nice birthday present for some well loved Administrator.

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Re: Oxford model 690

Post by Guest on Fri Mar 07, 2014 8:53 pm

You're right Bill, I went back and looked, and the other tubes sockets had places to attach the retainers. They were probably left with the back cover. Some one got into it with a soldering iron and must have been a novice. You can see where the iron laid against some of the wires and melted the insulation. It was completely dead and all the tubes tested OK so I pulled the chassis. I found a bad solder joint on the power cord and few other joints looked bad as well. I'm not sure what he was doing since all components look to be original, even 4 of the tubes.

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Re: Oxford model 690

Post by Wildcat445 on Fri Mar 07, 2014 11:46 pm

Or a well-loved moderator would be happy to have it. My birthday is right around the corner. Actually, I could change the date, if that would be an accommodation to you.  Laughing 

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Re: Oxford model 690

Post by Ron Pond on Sat Mar 08, 2014 2:05 am

.....It would look better on a Shelf in Australia ;-)
Because it has retaining wires on the tubes, none of them would fall out when it arrives Down Under.
Ron.
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Re: Oxford model 690

Post by Guest on Sat Mar 08, 2014 7:59 am

You're all too late, Dana has already claimed it. It's areal nice performer.

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Re: Oxford model 690

Post by Wildcat445 on Sat Mar 08, 2014 10:52 am

It must be cute!  cheers 

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Re: Oxford model 690

Post by Guest on Sat Mar 08, 2014 11:01 am

Wildcat445 wrote:It must be cute!   cheers 

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That's the magic word, you know what happens then!  Wink 

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Re: Oxford model 690

Post by Wildcat445 on Sat Mar 08, 2014 11:22 am

Nice try, Ron. Good to hear from you again. Don't be a stranger.  Very Happy 

It must be cute, if a female glommed onto it!  Laughing 
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Re: Oxford model 690

Post by Guest on Sat Mar 08, 2014 11:29 am

It must be cute, if a female glommed onto it!

And there you have it!  Sad 

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Re: Oxford model 690

Post by Bill Cahill on Sat Mar 08, 2014 1:37 pm

Tell her it broke down, and, is beyond repair. Ron, it wouldn't make it. Some of the retainers are missing. It has just enough to make it to Florida.
Think how nice it would match my eyes........

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Re: Oxford model 690

Post by Wildcat445 on Sat Mar 08, 2014 4:35 pm

lol! 

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Re: Oxford model 690

Post by 35Z5 on Wed Apr 09, 2014 10:39 am

I've never seen one of those... It is cute...


I've only seen the tube retainers mentioned used on the 35W4 & 50C5... A combination of extra tube mass, poor socket contact material & heat that further degraded sockets made them necessary, otherwise the tubes could fall out of the socket if bumped or shaken... Also made for many intermittent issues... There are none at all in the JA5 radios I pictured...

When I was about 12 a friend had one that a tube fell out & my dad showed us how to tighten socket contacts... Told him put the radio in one place and leave it there...
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Re: Oxford model 690

Post by Guest on Wed Apr 09, 2014 10:50 am

Note that this Japanese mini is a 6 tube.

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Re: Oxford model 690

Post by 35Z5 on Wed Apr 09, 2014 12:33 pm

MEZLAW wrote:Note that this Japanese mini is a 6 tube.

Yeah, it'll have a 35C5 because of the additional 12BA6, in your case the retainer clip will be on 35W4 & 35C5...

Not to be outdone, I have a Saxony with TEN tubes...



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