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 Post subject: Silvertone 42251 another somewhat rough project...
PostPosted: Jul Sun 23, 2017 6:06 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 4955
Location: Indianapolis, IN
Hello All,

Not really looking for anything like this, but when I saw it had a tuned-RF amp stage and a 4" X 6" speaker, thought it might be worth the $15 with free shipping just to "play with"...

Got it today and man, was it dirty & somewhat beat-up with rust on several of the metal pieces. And shipped in a box the same size as radio with one partial turn of bubble-wrap around it. Seller said it didn't work, but went ahead and applied power with test leads. The tuning knob rotated stiffly, but pointer didn't move---so turned pulley inside by hand. Received local stations very clearly with excellent audio, but at lower volume probably due to electrolytic caps.

Gave it preliminary cleaning, then pulled chassis and discovered what was causing tuning issue---there was not only a surplus of very thick grease on dial-pointer track, but two of the pulleys were seized and the dial-cord was very stiff (which I've never seen before). The tuning cap itself has vernier drive (probably a left-over from earlier set production) and pulley pressed on just for the slide-rule dial---was worried that it might be stripped from the binding dial-cord mechanics, but once cord removed tuner seemed fine...

Removed the hardened grease mess, dial-cord, and electrolytics (some of which had leaked). Hope to get it recapped & working properly Sunday. Matt had mentioned that these weren't the greatest of performers (found his video AFTER I bought it), and discovered in an old thread of mine where Ken (Compengsls) had added an external piece of ferrite rod to his that greatly increased its sensitivity which I plan to try...

By the way---Ted Williams endorsed this set when new (see below)...

Stay tuned for more pics and more when time allows...

John


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ARF TED WILLIAMS TAG.jpg
ARF TED WILLIAMS TAG.jpg [ 160.83 KiB | Viewed 676 times ]
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 Post subject: Re: Silvertone 42251 another somewhat rough project...
PostPosted: Jul Sun 23, 2017 5:27 pm 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 4955
Location: Indianapolis, IN
Removed grille and scrubbed it this morning as well as did more detail cleaning on the cabinet. Fortunately, handle brackets were attached with screws, so handle came off easily---and since leather was simply glued on (and had come loose), should be fairly straightforward to glue a new piece in place (have some of proper thickness leftover from an earlier project)... If radio performs well enough after repair, may even disassemble the side panels and replace the leather inserts since one has a "chunk" missing showing the foam-rubber padding beneath...

Am going to install new electrolytics after a late breakfast as well as some of the deteriorating wiring...

Progress being made...

A couple of Ebay pics below.

John


Attachments:
ARF SILV FRT EBAY.jpg
ARF SILV FRT EBAY.jpg [ 232.49 KiB | Viewed 647 times ]
ARF SILV DIRTY TOP-BACK EBAY.jpg
ARF SILV DIRTY TOP-BACK EBAY.jpg [ 190.54 KiB | Viewed 647 times ]
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 Post subject: Re: Silvertone 42251 another somewhat rough project...
PostPosted: Jul Mon 24, 2017 12:03 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 4955
Location: Indianapolis, IN
Mostly done today---installed the new electrolytics and replaced wiring to battery and speaker. Just need to straighten dents in grille before assembly, cut/install new dial-cord, rework handle, and attempt to polish rust off of clean handle bracket covers...

As mentioned before, the dial-cord pulleys were seized---and it was a chore to "free" them... Dripped Isopropyl alcohol on each one and rotated by hand to loosen internal crud. After several "treatments" the large pulley turned freely, but the small one would only rotate somewhat in one direction. Went to garage and applied acetone in same fashion using scrap mini-blind cord around pulley with both hands to rapidly rotate back and forth, blowing off with compressed air each "cycle". Took quite awhile to get the small pulley to spin each way easily. Finished off using same process with Windex "drippings" on both pulleys---now all seems well...

Connected the chassis to speaker and 9V battery with clip-leads and it had much more sensitivity and volume as expected. The IFT's only needed very slight tweaking for maximum performance, but the ANT trimmer on tuning gang made all the difference ! Set performs like an "average" radio with tuned-RF amp stage and playing with additional ferrite rod made little difference (had to retune ANT trimmer with each change in position). Maybe a "sweet spot" can be found in time, but had to quit for the evening. Both the volume & tone controls were erratic, so "dosed" with DeOxit Faderlube... Audio quality still seemed very good even with the large speaker out of cabinet, so wonder how it will do once set is back together.

Gettin' closer !

Pics below...

John


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ARF SILV REPLACED STUFF.jpg
ARF SILV REPLACED STUFF.jpg [ 206.71 KiB | Viewed 624 times ]
ARF SILV  CHS BEFORE.jpg
ARF SILV CHS BEFORE.jpg [ 175.83 KiB | Viewed 624 times ]
ARF SILV  CHS AFTER EXCEPT DIALCORD.jpg
ARF SILV CHS AFTER EXCEPT DIALCORD.jpg [ 167.9 KiB | Viewed 624 times ]
ARF SILV PRTS CLN 1.jpg
ARF SILV PRTS CLN 1.jpg [ 250.73 KiB | Viewed 624 times ]
ARF SILV PRTS CLN  2.jpg
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ARF SILV PRTS CLN 3.jpg
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ARF SILV PRTS CLN 4.jpg
ARF SILV PRTS CLN 4.jpg [ 190.37 KiB | Viewed 624 times ]
ARF SILV HANDLE PCS CLN.jpg
ARF SILV HANDLE PCS CLN.jpg [ 186.74 KiB | Viewed 624 times ]
ARF SILV CABINET CLN INS.jpg
ARF SILV CABINET CLN INS.jpg [ 245.15 KiB | Viewed 624 times ]
ARF SILV CABINET CLN FRT.jpg
ARF SILV CABINET CLN FRT.jpg [ 211.39 KiB | Viewed 624 times ]
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 Post subject: Re: Silvertone 42251 another somewhat rough project...
PostPosted: Nov Tue 21, 2017 2:34 am 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 4955
Location: Indianapolis, IN
Hello All,

It's been a few months, but finally completed this set after recovering handle with new leather. Was motivated by finishing the GE P-865 handle a couple days ago and this one was much simpler since there was no stitching involved...

The chrome caps on handle ends were badly rusted, so went over them MANY times with Mothers chrome polish just to make them look presentable. They actually look a bit better in person since the flash makes the pitting more visible.

Touched up the small nicks in leather with a black Sharpie which made a noticeable improvement in appearance.

The vernier drive on tuning cap still slips a bit on the high end of dial, so hope to eventually try to disassemble and clean/relube...

Radio does sound good with the large speaker once together, but sensitivity just isn't the greatest for a set with a tuned-RF amp stage. Maybe play with that ferrite-rod antenna again one day...

Pics below...

John


Attachments:
ARF RECOVERED HNDL AND HARDWARE.jpg
ARF RECOVERED HNDL AND HARDWARE.jpg [ 137.93 KiB | Viewed 188 times ]
ARF SILVERTONE CMPLT.jpg
ARF SILVERTONE CMPLT.jpg [ 226.09 KiB | Viewed 188 times ]
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 Post subject: Re: Silvertone 42251 another somewhat rough project...
PostPosted: Nov Tue 21, 2017 8:57 am 
New Member

Joined: Apr Wed 29, 2015 3:33 pm
Posts: 20
Beautiful, thorough restoration, as you always do. Well done!


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 Post subject: Re: Silvertone 42251 another somewhat rough project...
PostPosted: Nov Tue 21, 2017 1:29 pm 
Member

Joined: Oct Mon 26, 2009 10:02 pm
Posts: 4955
Location: Indianapolis, IN
Thanks much, Michael---at least it's better than what it was !

John


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