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 Post subject: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 7:23 am 
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Location: Waxahachie Texas
Guys,
I won this 1955 TV kit NIB at an auction today. It does not come with a CRT.

As you can see, the parts haven't even been removed from the carton! I talked to the seller and he said that he removed the instruction sheet to see what CRT it uses, but he didn't have that type. Otherwise completely unmolested. Because he already looked at the instruction sheet, I pulled them from the envelope.

What a find!

Of course the real question is should I keep it this way or build it?


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 7:24 am 
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More pics:


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 7:47 am 
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Joined: Aug Thu 20, 2015 3:09 pm
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Location: Albion, CA, USA
If you can find a CRT, I'd build it! Looks like a cool project and it would be fun. It makes my soldering finger itch just thinking about it! What CT does it use?


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 11:00 am 
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Yeah, definitely build it!
I won a Tech Master AA5 kit on eBay some years back, and built it (it was missing some parts, chassis had to be cleaned of rust, grill cloth came from a piece of one of my wife's blouses, and every single resistor was well beyond spec), with no regrets. :wink:


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 5:18 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: WI 54812
I'd build that, with no reservations! Here I found it in my 1956 Burstein Applebee Radio Master catalog. Looks like Fifties radio directly below it. Looks like you may have the 5516W wired and aligned IF version?

Image


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 7:24 pm 
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Joined: Sep Tue 15, 2015 9:25 pm
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Oh, God yeah. I'd build it!!!! Back around 2003 I acquired a complete unnilested and unbuilt Leutz model C superhet kit and inbuilt it. What a thrill!

Go for it!

George


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 7:31 pm 
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Location: Waxahachie Texas
madlabs wrote:
If you can find a CRT, I'd build it! Looks like a cool project and it would be fun. It makes my soldering finger itch just thinking about it! What CT does it use?


The manual suggests "A low-voltage electrostatic or self-focus picture tube is recommended for use with this receiver." 17" to 21".

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 7:49 pm 
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A 21FP4 looks like it would work?

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 9:12 pm 
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Location: Waxahachie Texas
I think these CRT's will work:

I've looked up some CRT's that would work:

17HP4
17TP4
17CGP4
17CP4B
19QP4
20HP4
20HP4E
20LP4
20MP4
21FP4D
21AFP4
21YFP4

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 9:14 pm 
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Location: Martha's Vineyard, Mass.
It's a marvelous find, no doubt. I'm on the fence about building it, though.

If you do build it, take a gazillion pics of it as you unwrap it, build it, etc.

I would not use the caps that came with it, if they are tubulars. 8)

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Sun 20, 2016 9:15 pm 
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Naaa....leave it alone. Don't build it. 8)

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Mon 21, 2016 8:28 pm 
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Location: Waxahachie Texas
I'm leaning toward building it. What an opportunity!

Here is a list of CRT's that I pretty sure will work. Of course there are others, I just haven't taken the time to do more research. I sent off an email to EFT because they list about 6 from 17" to 21" that will work. I'm guessing that a 19FP4 and a 19KP4 if there are such animals would work also.

17CGP4
17FP4
17GP4
17HP4
17LP4
19QP4
20FP4
20GP4
20HP4
20HP4C
20CP4
20MP4
21AFP4
21FP4
21KP4
21MP4

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Tue 22, 2016 8:39 pm 
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Location: Waxahachie Texas
I did a little poking around without disturbing the kit. There are some pieces that are wrapped in newspaper. It was from the Obituary section! It listed someone who died on January 6, 1957.

I think the kit was designed in 1955, hence the #5516, but this kit shipped sometime in 1957.

The dates on the drawings IIRC was October 1955.

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Wed 23, 2016 4:52 am 
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Location: Waxahachie Texas
Looks like ETF has 2 CRT's that would work.

A 17LP4B which is a good used aluminized CRT that operates at 12Kv.

A20MP4 which is a new CRT that operates at 14Kv.

I'll have to do a quick check to see if the 20MP4 will fit. Though I do think it will.

Any thoughts or comments on using a used aluminized 12Kv CRT vs a new "plain" 14Kv CRT?

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Wed 23, 2016 7:11 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3681
Location: WI 54812
That chassis will be a whole lot easier to handle if you stay with a 17 inch CRT. There's no advantage to the larger CRT unless you have a large group that want's to watch it from afar, which is never a requirement for an old TV at our house. :)


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Thu 24, 2016 1:50 am 
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Location: Michigan
+1 on the 17 being easier to manage. The aluminized crt will produce a brighter picture. The 17 will be more historically authentic for that specific timeframe and for the mindset of a typical kit builder of the day. Larger crts tend to just show raster lines and flicker, compared to smaller. Four votes for the 17LP4B.


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Thu 24, 2016 2:16 am 
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Speaking of Tech Master. I found this recently. Looks like major surgery. Wonder what the mod would accomplish as far as reception quality.

Image

full sheet in high resolution here.


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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Thu 24, 2016 2:23 am 
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Location: Waxahachie Texas
WeekendHacker wrote:
+1 on the 17 being easier to manage. The aluminized crt will produce a brighter picture. The 17 will be more historically authentic for that specific timeframe and for the mindset of a typical kit builder of the day. Larger crts tend to just show raster lines and flicker, compared to smaller. Four votes for the 17LP4B.


Thanks for your comments and vote. They are appreciated.

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Thu 24, 2016 2:24 am 
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Joined: Jan Sun 18, 2015 5:01 am
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Location: Waxahachie Texas
WeekendHacker wrote:
Speaking of Tech Master. I found this recently. Looks like major surgery. Wonder what the mod would accomplish as far as reception quality.

Image

full sheet in high resolution here.

I don't know, but it doesn't apply to my chassis. Neat to see. I've been looking for other Tech-Master docs but haven't come up with any.

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 Post subject: Re: Tech-Master NIB TV Kit #5516
PostPosted: Nov Thu 24, 2016 4:15 am 
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Location: Ann Arbor, MI
The 20MP4 CRT needs to have an ion trap magnet to work. That should be easy to come by. Most everyone here will have a few laying around.

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