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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Wed 23, 2020 7:39 pm 
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Joined: Sep Wed 23, 2020 1:24 pm
Posts: 3
Thank you for the welcome everyone. I am new at working on solid state electronics, so I am sure I will have questions. Most of my tinkering time is spent with old bicycles and the occasional hub dynamo lighting system wiring job, but this presents a new and interesting challenge for me. Making old, well-made things run well again can be a rewarding past time. Also very impressed with the quality feel of this radio and its components. I'm going to start by hooking up an AA battery holder with some fresh rechargeable batteries I have handy, and go from there. I have some threads here saved for sourcing good transistors and I'll search for the capacitor specs since a few of them look a little gummy. I think there is electrolyte oozing from one or two. I saw a thread on adding warm light LEDs and wiring them to the on/off switch with the dial light spring removed so that the lights run continuously. Once this fellow is up and running, I might try my hand at that mod along with a good cleaning. Time to dust off the soldering iron...are there any tool tips? Things I should have handy?

Thanks.

Ged


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Wed 23, 2020 8:55 pm 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 775
Location: Panama City, FL 32401
Hello Ged. A good assortment of electrolytics is a must. Here are the most common you'll need:
1uf
2 rarely
3.3
4.7
10
15 or 22
33
47 very often
100 sometimes
220 sometimes
Many recommend 25/35/50 volt rating behave similar to the original characteristics
Both radial and axial. Having some light gauge wire to replace corroded wire sometimes.


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Wed 23, 2020 9:05 pm 
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Joined: Sep Wed 23, 2020 1:24 pm
Posts: 3
Zenith Royal wrote:
Hello Ged. A good assortment of electrolytics is a must. Here are the most common you'll need:
1uf
2 rarely
3.3
4.7
10
15 or 22
33
47 very often
100 sometimes
220 sometimes
Many recommend 25/35/50 volt rating behave similar to the original characteristics
Both radial and axial. Having some light gauge wire to replace corroded wire sometimes.


Hi Zenith Royal, that was going to be my next post / series of questions. I've been doing a lot of reading and watching. I don't want to power up the 56 year old radio and risk damaging components without a thorough inspection / replacement of electrolytic caps. This service tag is on the inside of the radio. It looks like it was last serviced in 1993? At any rate it has been sitting for many years. This is a new project and I will take my time and do it right, one cap at a time. I have downloaded the service manual. Thank you for the list.


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 1:31 am 
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Joined: Aug Sat 16, 2014 2:19 am
Posts: 1783
Location: Palos Verdes, CA
This Nivico Model 10TA-1S 3 Band transistor radio is an excellent performer and I have only replaced the battery holder.


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 4:01 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 6580
Location: Indianapolis, IN
Nivico made some neat sets and that one has a tuned RF-amp stage !

John


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 5:28 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 36212
Location: SoCal, 91387
xrhonda91 wrote:
Nivico made some neat sets and that one has a tuned RF-amp stage !

John

John's tongue is hanging out...


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_________________
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\He Who Dies With The Most Radios Wins/////////////////////////
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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 3:48 pm 
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Location: Burke, VA 22015
fifties wrote:
xrhonda91 wrote:
Nivico made some neat sets and that one has a tuned RF-amp stage !

John

John's tongue is hanging out...

+1

_________________
Binh


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 9:50 pm 
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Joined: Apr Wed 21, 2010 12:01 am
Posts: 360
Looking at the tuning cap, It looks like only the antenna sections are showing. Where are the oscillator sections? Ken


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 10:23 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1235
Location: Butte, MT USA
Gotta love my local, independent, thrift store:

[url][url=https://imgur.com/ZFRtL1A]Image[/url][/url]


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Thu 24, 2020 11:54 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 17969
Location: Utica, NY 13502 (USA)
compengsls wrote:
Looking at the tuning cap, It looks like only the antenna sections are showing. Where are the oscillator sections? Ken
I would assume that one of the three sections is for the oscillator. Wondering why you think there is no oscillator section?

Dave


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Fri 25, 2020 12:14 am 
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Posts: 36212
Location: SoCal, 91387
Dave Doughty wrote:
compengsls wrote:
Looking at the tuning cap, It looks like only the antenna sections are showing. Where are the oscillator sections? Ken
I would assume that one of the three sections is for the oscillator. Wondering why you think there is no oscillator section?

Dave

I just counted the vanes on each of the three gangs, and they are all the same, 7 (unless my old eyes deceive me). That's interesting, given that the osc gang would normally have less than the antenna gang.

Anyway, three gangs; RF, Osc, Ant.

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


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Fri 25, 2020 1:24 am 
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Joined: Apr Wed 21, 2010 12:01 am
Posts: 360
My mistake. On closer look one gang seems to have less blades and voila! The oscillator section. An embarrassed Ken


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Fri 25, 2020 1:46 am 
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Joined: Apr Wed 21, 2010 12:01 am
Posts: 360
Another look aroused my curiosity. I see a coil for one band of the TRF stage. Where are the TRF coils for the other 2 bands? ( I hope my eyes aren't playing tricks on me). Ken


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Sep Fri 25, 2020 1:53 am 
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Joined: Apr Wed 21, 2010 12:01 am
Posts: 360
I put my foot In my mouth again. In magnifying the picture, the 2 other coils are to the left of the higher shielded coil in the center next to the set of trimmers. I'm going to make an appointment with my eye doctor tomorrow. Sorry about that. Ken.


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 Post subject: Re: Got Transistor Radio Collections? New Finds? Let's See
PostPosted: Oct Thu 22, 2020 12:55 pm 
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Joined: Feb Thu 22, 2018 10:05 am
Posts: 24
My Aitc 9 Transistor AM.FM 1966.


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