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 Post subject: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Sun 12, 2021 9:34 pm 
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Location: Palos Verdes, CA
I found Matt's youtube video on 50sTransistorRadios on the Sears Silvertone Model 7228 and thought you would find it interesting as I didn't know that Sears had sold such a transistor radio:

https://www.youtube.com/watch?v=zAoe3wtPj7A


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Sun 12, 2021 10:11 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
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Location: Indianapolis, IN
Hey Mark,

Those are neat, early radios---have only seen a couple on Ebay through the years. Watched that video myself again not long ago...

John


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 13, 2021 3:57 am 
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I have this early Silvertone 7228 radio too - in about the same condition. I got mine from our radio club's "free table" about two years ago.

After replacing electrolytic caps and paper capacitors, the radio works well using all it's original transistors. I recall a 2N35 transistor in the line-up, so that shows some very early transistor types being used.
I tried to sell this radio recently at a summer club radio sale, working with batteries, for $5. and had zero offers or interest. Seems most of my club member's interests are tube radios. While it is interesting because it is Sears & Roebuck's first transistor radio sold through it's catalog, it is by no means a great performer.
After watching the YouTube video, I think I'll keep it and use it out in the garage. BTW, I have the original user's manual with fold-out schematic.

Jeff


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 13, 2021 5:26 am 
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Location: Indianapolis, IN
Hey Jeff,

Don't think I could have passed it by for $5---even though I no longer have enough room for larger radios ! Imagine Matt would really like to have a scan of your manual---always great to have documentation even if digitized...

John


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 13, 2021 5:37 am 
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1N770 wrote:
I have this early Silvertone 7228 radio too

After replacing electrolytic caps and paper capacitors, the radio works well using all it's original transistors.

While it is interesting because it is Sears & Roebuck's first transistor radio sold through it's catalog, it is by no means a great performer.


You might try doing alignments on the IF cans, and the RF trimmer on the antenna gang of the tuner. If you don't have a signal generator, you can align by ear, tuned to a weak but non fading station. The increase in performance might be surprising.

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


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 13, 2021 12:50 pm 
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Here are some pictures from Matt's video.

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Silvertone 7228 Transistor Radio(2).jpg
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Silvertone 7228 Transistor Radio(3).jpg
Silvertone 7228 Transistor Radio(3).jpg [ 211.47 KiB | Viewed 740 times ]

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Silvertone 7228 Transistor Radio(1).jpg
Silvertone 7228 Transistor Radio(1).jpg [ 287.19 KiB | Viewed 740 times ]


Dave


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 13, 2021 7:58 pm 
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Here is the schematic for the Silvertone 7228 transistor radio. Also, some other info from the user's manual. There is more info like a parts list
and alignment procedures. I can post those too if someone needs it.

Jeff


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Silver2.JPG
Silver2.JPG [ 863.49 KiB | Viewed 716 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 13, 2021 7:59 pm 
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Schematic



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Silver1.JPG
Silver1.JPG [ 306.28 KiB | Viewed 715 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Tue 14, 2021 5:40 pm 
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It's nice to hear that people on this forum are still enjoying my videos! (Even if it's just the radio the radio ones)

Jeff, it's surprising to me that nobody picked up your 7228, even if just for parts (though it would of course be a shame to part out a good example).
I had a similar experiance the last time I went to Kutztown, as a number of my radios didn't sell even, when I marked down to a fraction of what they would go for online.
I'm glad you were able to get your 7228 working nicely too, and I hope you enjoy it!
As to the manual, I would be curious to see more of it, as I have never seen a manual for this model, and it would be nice to have pictures of it for my files, as John suggested.
Thank you for the scans you have posted already! I wonder why they kept putting transistor in quotes, as if it was a marketing term like "Radionet".


Attachments:
1956 ad crop.png
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Wed 15, 2021 4:03 pm 
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That's a cool radio, I didn't know existed.

I was all ready to say that's not a transistor radio, proves I don't know everything(though by tomorrow I'll forget I don't know it all).

I have a 8222 that's similar but has toobs, this radio is a year newer than the 7228.

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Tom


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Fri 17, 2021 7:49 pm 
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I found the time (didn't forget!) to scan the user's manual for the 1956 Silvertone Model 7228 Transistor Radio. This very early transistor radio first appeared in the Sears & Roebuck Christmas Catalog in 1956 and was the first transistor radio sold by them.

Anyone needing information about this set will probably find everything they need in these documents.

Jeff
Troutdale, Oregon


Attachments:
File comment: Front & back
Silvertone7228a.JPG
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File comment: First page
Silvertone7228b.JPG
Silvertone7228b.JPG [ 892.16 KiB | Viewed 584 times ]
File comment: Fold-out
Silvertone7228c.JPG
Silvertone7228c.JPG [ 702.44 KiB | Viewed 584 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Fri 17, 2021 7:52 pm 
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Here the rest of the user's manual with schematic, parts list and alignment information for the Silvertone Model 7228 Transistor Radio.

Jeff
Troutdale, Oregon


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Silvertone7228d.JPG
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Silvertone7228e.JPG
Silvertone7228e.JPG [ 371.11 KiB | Viewed 584 times ]
Silvertone7228f.JPG
Silvertone7228f.JPG [ 480.42 KiB | Viewed 584 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Fri 17, 2021 8:18 pm 
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Found this photo in the file, taken of my chassis before replacing capacitors. Notes scribbled on photo too. Looks like the chassis of a tube radio. Actually, it probably was, with tube sockets replaced with transistor sockets. I don't think miniaturization was the main focus at the time, only the introduction of a new technology.

Jeff
Troutdale, Oregon


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File comment: Chassis photo
Silvertone7228chassis.JPG
Silvertone7228chassis.JPG [ 580.22 KiB | Viewed 582 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Fri 17, 2021 9:13 pm 
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Location: Indianapolis, IN
Thanks much, Jeff---saved them to folder "just in case" !

Just think that a few years later, Arvin made this "cordless" set for Sears---and it is an excellent performer having a tuned RF-amp stage...

John


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20ARF 1019 CMPLT FRT.jpg
20ARF 1019 CMPLT FRT.jpg [ 482.39 KiB | Viewed 576 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Sat 18, 2021 8:16 pm 
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Jeff, thank you for scanning the rest of the manual, I've saved those pictures in my files! Those alignment instructions may help future people as well.
I'm surprised at how detailed the manual for it was, most consumer transistor radio user manuals didn't have much more than a schematic back in the 1950's, if they had even that (sometimes it was inside the cabinet instead).

John, the Silvertone model 7228 was made by Warwick Electronics (as indicated by the 528 prefix on the chassis number), along with the Silvertone model 8220, and a few other sets.
I haven't had my hands on the model you pictured, but it looks like a nice one! Vernier tuning is a big plus in my book, as it makes tuning in the higher stations a lot easier.

At one point I had a list of all the Silvertone chassis prefix codes, and the makers they were associated with, but I can't seem to find that now.


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Silvertone 8220.jpg
Silvertone 8220.jpg [ 159.17 KiB | Viewed 537 times ]
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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Sat 18, 2021 9:50 pm 
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Location: Indianapolis, IN
Matt---there was another of the one like mine on Ebay for awhile with no interest, but someone finally bought it for $12.50 ! https://www.ebay.com/itm/265295728487?V ... 5295728487

Hope someone got it who'll appreciate what they have as I've only seen or heard of these two in all the years I've been browsing Ebay and other sites. Tom has another very similar model and it also is extremely scarce as far as the "on-line world".

John


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Sat 18, 2021 10:50 pm 
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Location: Palos Verdes, CA
Matt - I have a Sears 7216 7 transistor radio that uses 2 "N" batteries and the owner's manual has a schematic and a list of all of the components. Sears has instructions on "How to order replacement parts!" There are also instructions on alignment data. - Mark


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 Post subject: Re: Sears Silvertone Model 7228 Transistor Radio
PostPosted: Sep Mon 20, 2021 5:03 am 
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John, these sorts of AM-only portables seem to be fairly scarce in general, compared to pocket sized radios from the same makers in the same time period. I see that one was missing the battery cover, which is something that usually makes me pass on radios too, as they are basically impossible to replace without a whole parts set.

Mark, that's interesting to know, and a bit surprising since those miniature sets are not easily repaired. Thinking back, I think I have seen similar info provided with other Silverstone radios. Perhaps Sears was just better than the rest in that regard.


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