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 Post subject: Motorola X60N project...
PostPosted: Mar Mon 05, 2018 3:14 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Hello All,

This popped up on Ebay with a reasonable "Buy It Now" and free shipping and thought it might be an interesting set to play with...

Larger than I thought from pictures. It arrived complete with 2-"AA" batteries and only had very slight audio "hiss" when turned on. Using another nearby radio, the oscillator proved "active"...
The power input filter cap appears to be almost "disintegrated" within it's vinyl wrap which is covered in tiny "blisters" and dried electrolyte residue is all around it---also PCB trace beneath appears discolored. Tried jumping the audio coupling cap with good part and only heard "clicking" in speaker as leads made contact, so will replace all electrolytics before proceeding. The audio output is OTL and uses a center-tapped speaker like many earlier RCA sets.

Ebay pic below---more to come !

Anyone else have one ?

John


Attachments:
arf x60n ebay pic.jpg
arf x60n ebay pic.jpg [ 204.68 KiB | Viewed 1200 times ]
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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Tue 06, 2018 3:40 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
It's now working ! But the electrolytics weren't the problem...

No time left tonight for details, so stay tuned !

John


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Wed 07, 2018 4:32 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Cosmetics detail cleaned and the tuning dial/magnifier polished this evening---more to come !

John


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Wed 07, 2018 5:46 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 29495
Location: SoCal, 91387
Hey John, that seems to be a rarity. In fact my Bunis Guide shows an X60 E & W (made in 1965), but no N . Values $10-$15.

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


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Thu 08, 2018 3:00 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Hey Richard---got it completed tonight and hope to post pics in the next couple days... The label is still inside back cover and shows model #. Seems to work very well after recap & repair without any tweaking...

John


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 2:22 am 
Member

Joined: Dec Wed 16, 2015 10:31 pm
Posts: 220
Location: Toronto ON
I have the E model (Ebony? - it's dark brown, almost black). I agree it's a good performer - mine did need a bit of tweaking.
While the 'Eight Transistor' graphic on mine appears to have less damage than in that photo, the Motorola graphic is badly corroded.
One day I'll get around to cleaning up the plates and reproducing the graphics.
Joe


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 2:37 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Hey Joe---when you are ready, I can try and get some good "straight-on" pics of the Motorola trim-plate. Just let me know ! Does yours also have to be turned up to max to get "listenable" volume on weaker signals ??? "Normal" and stronger signals are fine with plenty of reserve audio...

Finishing touches on this 1965 set and project detail write-up tonight...

The front of speaker was really dirty, so very gently "brushed off" with a clean Q-tip and carefully used vacuum cleaner nozzle at a safe distance to remove residue. The original speaker wiring was solid-conductor, so replaced with longer lengths of stranded 28 gauge Teflon insulated wire for easier servicing in the future. The earphone jack contacts were somewhat corroded, so removed its wiring and added a jumper to PCB for bypass.

Had to remove the tuning knob for cleaning and when re-installing, noticed that the dialcord was "crossed" on the variable cap pulley---removed ends and corrected which resulted in smoother "action"...

The battery holder was missing the lower contact pair and previous owner had simply used a piece of wire in its place. Had a damaged Toshiba holder in parts bin and was able to salvage a good contact assembly from it which fit and worked fine---see pic below...

Replacing electrolytics didn't restore operation---after troubleshooting, discovered that the ferrite-rod antenna input winding was open. Found the break and fortunately had enough wire to form a small hook to attach to winding stub and solder. The coil at other end had come loose from rod, so used tip of soldering iron to carefully melt and flow the green wax (smelled like a melted crayon) around edge to secure. Radio worked fine afterward---very good sensitivity/selectivity all across band. Sound decent, but volume level on weaker signals just "listenable" at maximum. Was very surprised during "tweak session" to find that the ANT trimmer and all IF's were pretty much "dead-on" as they were---and the volume control was "noise-free"...

Project pics below in two "installments"... The last pic shows a Zenith Royal 500H with the X60N for size comparison.

As always, like to hear from others who have had experiences with the radios featured in projects.

John


Attachments:
1ARF X60 PCB BEFORE.jpg
1ARF X60 PCB BEFORE.jpg [ 233.21 KiB | Viewed 1036 times ]
2ARF X60 SPKR BEFORE BK.jpg
2ARF X60 SPKR BEFORE BK.jpg [ 225.71 KiB | Viewed 1036 times ]
3ARF SPKR FRT CLEANED.jpg
3ARF SPKR FRT CLEANED.jpg [ 141.78 KiB | Viewed 1036 times ]
4ARF X60 ORIG CAPS.jpg
4ARF X60 ORIG CAPS.jpg [ 192.87 KiB | Viewed 1036 times ]
5ARF X60 PCB AFTER BK.jpg
5ARF X60 PCB AFTER BK.jpg [ 201.22 KiB | Viewed 1036 times ]
6ARF X60 PCB CMPLT BK.jpg
6ARF X60 PCB CMPLT BK.jpg [ 215.8 KiB | Viewed 1036 times ]
7ARF X60 ANT WINDING REPAIR.jpg
7ARF X60 ANT WINDING REPAIR.jpg [ 130.44 KiB | Viewed 1036 times ]
8ARF X60 CMPLT INS.jpg
8ARF X60 CMPLT INS.jpg [ 176.43 KiB | Viewed 1036 times ]
9ARF TOSHIBA DONOR BAT CONTACT.jpg
9ARF TOSHIBA DONOR BAT CONTACT.jpg [ 178.03 KiB | Viewed 1036 times ]
10ARF X60 RAGGED CASE CLND.jpg
10ARF X60 RAGGED CASE CLND.jpg [ 145.31 KiB | Viewed 1036 times ]


Last edited by xrhonda91 on Mar Fri 09, 2018 2:42 am, edited 1 time in total.
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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 2:38 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Here are the remaining project pics---please see previous post for first group...


Attachments:
11ARF X60 PRTS CLEAN IN.jpg
11ARF X60 PRTS CLEAN IN.jpg [ 236.51 KiB | Viewed 1035 times ]
12ARF X60 PRTS CLEAN OUT.jpg
12ARF X60 PRTS CLEAN OUT.jpg [ 204.94 KiB | Viewed 1035 times ]
13ARF X60 CMPLT FRT.jpg
13ARF X60 CMPLT FRT.jpg [ 183.51 KiB | Viewed 1035 times ]
14ARF X60 CMPLT FRT LFT.jpg
14ARF X60 CMPLT FRT LFT.jpg [ 178.58 KiB | Viewed 1035 times ]
15ARF 500H X60 SIZE COMPARE.jpg
15ARF 500H X60 SIZE COMPARE.jpg [ 208.8 KiB | Viewed 1035 times ]
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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 2:44 am 
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Joined: Nov Mon 26, 2012 1:21 am
Posts: 84
I confused by the three connections on the mono speaker. :?


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 2:47 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Hey Marty---this radio has no audio output transformer and uses a "center-tapped" speaker voice-coil instead like RCA did a few years previous. Will post schematic if interested...

John


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 3:44 am 
Member

Joined: Dec Wed 16, 2015 10:31 pm
Posts: 220
Location: Toronto ON
John:
Yes, I find it does need to be turned up more than usual on weaker signals. Just discovered it has developed an intermittent problem with the audio though, so it may be related. I recapped this one years ago - guess it needs to be revisited. It'll have to go to the back of the line, though, as I have far too much else on the go.
I have enough of the graphic that it can be restored. In fact, the typeface is plain enough that I will probably be able to find the correct font and replicate it that way. Thanks for the offer though.
Joe


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Fri 09, 2018 1:47 pm 
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Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1493
That's a neat little restoration!


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Sat 10, 2018 12:35 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Thanks Metzman !

John


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Sat 10, 2018 10:51 pm 
Member

Joined: Jan Tue 23, 2018 11:53 pm
Posts: 115
Location: Appleton, WI 54914
Another sweet thorough job. Wow


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 Post subject: Re: Motorola X60N project...
PostPosted: Mar Sun 11, 2018 7:30 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5559
Location: Indianapolis, IN
Thanks CJ Design !

John


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