K-Mart Tube B&W - Videokarma.org TV - Video

jstout66 · #1 08-05-2015, 07:14 PM

Here's one you don't see often. A K-Mart branded set. (Made by Sanyo)
Tim.. you may not remember, but you sent me this over 10 years ago!
I haven't had it on in ages, and I see the vertical is a tad touchy. Kind of funny because my Midland set is doing the same thing, and they both use
17JZ8 tubes, so guess what I ordered off of eBay today??

dieseljeep · #2 08-06-2015, 10:27 AM

Quote:

Originally Posted by jstout66

Here's one you don't see often. A K-Mart branded set. (Made by Sanyo)
Tim.. you may not remember, but you sent me this over 10 years ago!
I haven't had it on in ages, and I see the vertical is a tad touchy. Kind of funny because my Midland set is doing the same thing, and they both use
17JZ8 tubes, so guess what I ordered off of eBay today??

Set looks like it could be a hybrid, but the vertical circuit is similar to the color set posted. It also looks like the 17JZ8 was replaced already.
I have a Sears branded Sanyo set, a little older, same problem.

jstout66 · #3 08-06-2015, 11:47 AM

Good Eye.... the tube was a Zenith replacement with a code date of 1978.
This one will be easier to work on if it's a cap, but again.. I'm taking the lazy route.
I only kept this set as it's K-mart branded. Me normally no likie the Japanese sets. (or in this case.. Korean)

zeno · #4 08-06-2015, 05:48 PM

17JZ8 a hot number used in a ton of sets.

73 Zeno

radiotvnut · #5 08-06-2015, 06:00 PM

I had the Sanyo version of this set (mine was also made in Korea); but, it was in horrible shape and I junked it. This is the only Korean tube set that I've ever seen and this must have been one of the last tube B&W portables.

jstout66 · #6 08-11-2015, 05:40 AM

Got the tube and popped it in last night, and it appears that was the fix. Screen shot is 10 hours on so far, and vertical is rock solid. I did have to adjust both height and linearity with the new tube. And ya.. this one is kind of late for tubes. It's got click-stop UHF, and when was that mandated, 75 or 76???

zenith2134 · #7 08-11-2015, 02:26 PM

That's got a great picture on it.
I remember 1975 being the year that detented tuners were required.

Jeffhs · #8 08-11-2015, 03:52 PM

Yes, 1975 was the year detented UHF tuning (to make UHF as easy to tune as VHF) was required in all new TVs. I guess too many people complained about how difficult it was to tune in a UHF TV channel properly.

BTW: Today's flat screens, with all-electronic tuners (no knobs or dials to be seen anywhere, just up/down channel buttons) are even easier to tune--all you do is select the channel you want to watch and enjoy the show. No fine tuning required, ever. I don't remember if the detented UHF tuners had fine-tuning controls, though.

jstout66 · #9 08-11-2015, 08:14 PM

Thanks! Not the best screen shot, but the picture tube is pretty good in it.
I wonder how much they sold new? Couldn't have been much.
I was looking for a Sams for it. Does anyone have one?
On the Sams site they said 1653-SED. Not sure what the "SED" is about? A sub folder.
The K-Mart Model Number is SKP-1214

zeno · #10 08-12-2015, 09:55 AM

SED is Special Equipment Data. It basicly means you
DONT get the usual Sams, just a schematic from the
OEM as a rule. Can be almost useless especially on a Jap
set cause of the way they draw schematics. Unreadable & messy
in most cases.

73 Zeno

consoleguy67 · #11 08-12-2015, 05:17 PM

Yes, there was a limited amount of fine tuning on the detented UHF tuners. I have a 12" black and white Hitachi from 1980 that's like that.

Robert Grant · #12 08-12-2015, 07:41 PM

Quote:

Originally Posted by Jeffhs

Yes, 1975 was the year detented UHF tuning (to make UHF as easy to tune as VHF) was required in all new TVs. I guess too many people complained about how difficult it was to tune in a UHF TV channel properly.

BTW: Today's flat screens, with all-electronic tuners (no knobs or dials to be seen anywhere, just up/down channel buttons) are even easier to tune--all you do is select the channel you want to watch and enjoy the show. No fine tuning required, ever. I don't remember if the detented UHF tuners had fine-tuning controls, though.

Most detent UHF tuners I have seen had a fine tuning ring coaxial with the tuning shaft, just like the VHF tuner. The difference was that, if one turned the UHF fine tuner too far, it actually changed the channel (up or down, depending on which way one was turning it.

I almost can't believe that they mandated detent UHF tuners because they were easier to tune. The non-detent tuner on our GL759 (CTC-38) was far easier, just twist the dial, and it was there.

Using the detent tuner annoyed everyone in the room with its clicking noise, and my mom insisted it would "break the set". Of course, not everyone lived in a TV market where Going from channel 20 to channel 62 was a common occurrence.

UHF detent tuners didn't "track" as well as the VHF tuners did. If I tuned channel 20 correctly, turning the dial to 50 didn't take me straight to 50, I had to retune.

wa2ise · #13 08-13-2015, 04:07 PM

Quote:

Originally Posted by Robert Grant

Using the detent tuner annoyed everyone in the room with its clicking noise, and my mom insisted it would "break the set". Of course, not everyone lived in a TV market where Going from channel 20 to channel 62 was a common occurrence. .

So how many of us took the UHF tuner out, remove the little ball bearing and spring used to create the detent effect, then reinstall it back in the set?