First Annual ETM Swapmeet - October 3 - Page 2 - Videokarma.org TV - Video

WISCOJIM · #1 10-06-2015, 08:40 AM

Interesting modulator. Hope you can find the schematic and specifications on it.

Looks like those TVs had some rough storage, and the one looks like it was used to mow the lawn!

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Electronic M · #2 10-06-2015, 02:33 PM

Quote:

Originally Posted by WISCOJIM

Interesting modulator. Hope you can find the schematic and specifications on it.

Looks like those TVs had some rough storage, and the one looks like it was used to mow the lawn!

.

Google tells me nothing about the modulator or it's maker, and I doubt Sam's has any info....Turns out is it a video only modulator. Only things likely to be bad in it are 4 lytics, two tubular caps, and 2 seleniums.

That Zenith was stored in RCA2000's shed apparently....I don't know if that is how it got rusty or if that is how he got it, but if it had been stored better it would be a minty low hours set....It still seems to have all Zenith yellow label tubes in it. The grass I don't mind, but I did have a problem with the 50-cent-piece sized garden spider that came running out during the test power up I gave it.

I apparently have a spare CRT for the Zenith (though I likely won't need it).

*zenithfan1* · #3 10-04-2015, 09:52 AM

Wish I could've been there!

jbattles · #4 10-06-2015, 11:29 AM

Why cant people post normal pictures instead of this photo bucket thing that takes forever to load in. Grrrrr sorry rant over. Good job I do like them.

Olorin67 · #5 10-06-2015, 04:17 PM

i have some tube audio only modulators, once used by a hotel to put radio station audio on to unused Tv frequencies, so guests could get radio in addition to Tv. Would it be practical to combine the outputs to get both video and sound?

Electronic M · #6 10-06-2015, 11:54 PM

I'm going to have to sort out what I want to do to that Zenith aside from clean it and make it work right. It'll be a lot of work to remove/fix the rust so I don't know if it will be worth it/doable to make it look like new. If worst comes to worst there is a coolness to a set that rough working like new.....Like seeing someone drive a repaired barn find vintage car in otherwise as found condition.

The Teledyne tested good on two guns and then all started to test bad....If I can get life from it on a brightener I'll keep it, if not then I don't plan to drop a $100+ CRT into a 15$ tv.

Soon I'll get on these sets, but for now I have a paying repair job to get out the door (and collect on), and some half done auto repair on my plate.

Quote:

Originally Posted by Olorin67

i have some tube audio only modulators, once used by a hotel to put radio station audio on to unused Tv frequencies, so guests could get radio in addition to Tv. Would it be practical to combine the outputs to get both video and sound?

I don't know enough to give a definite answer. If they can be set to CH 3 or 4 (as my mod's controls say it can) then it may be possible that the two carriers could be usefully combined....I want to repair and reverse engineer my unit to understand/confirm it's function (and possibly study TV modulator circuit stage topology) before I try to figure out how to add sound.

rca2000 · #7 10-07-2015, 12:06 AM

The Teledyne is OBVIOUSL:Y a GE set--the C2 or whatever--from maybe 1971-73 or so. NEVER saw one wiht what I would call a "good picture". NEVER Liked those--use d WEIRD HV rect which is COATED with lead and a strange # H-out tube--26HU5, too. Hot, doubler, , compactrons.. NOT the quality of a Zenith, or even RCA or Mag..

Electronic M · #8 10-07-2015, 01:04 AM

Quote:

Originally Posted by rca2000

The Teledyne is OBVIOUSL:Y a GE set--the C2 or whatever--from maybe 1971-73 or so. NEVER saw one wiht what I would call a "good picture". NEVER Liked those--use d WEIRD HV rect which is COATED with lead and a strange # H-out tube--26HU5, too. Hot, doubler, , compactrons.. NOT the quality of a Zenith, or even RCA or Mag..

Oh, so that is a lead coating and NOT a SS replacement HV rect like I thought it was......Interesting.

I'm expecting that IF I can coax life out of the CRT it'll probably be like a large screen portacolor with better dot pitch/resolution.
Hot chassis sets have never bothered me....Most of my early tube experience was with AA5s, and my folks tell me that as an infant I had an insatiable/unstoppable desire to stick my fingers in the outlets, and sample 120VAC....
I will say that while I'd expect a Zenith to survive a drop (or any adversity for that matter) better, those portacolors are surprisingly tenacious survivors for what they were meant to be....Almost on par with Zeniths if both are kept in good/ideal climate controlled conditions all their lives and used sparingly.

DavGoodlin · #9 10-08-2015, 10:01 AM

Quote:

Originally Posted by rca2000

The Teledyne is OBVIOUSL:Y a GE set--the C2 or whatever--from maybe 1971-73 or so. NEVER saw one wiht what I would call a "good picture". NEVER Liked those--use d WEIRD HV rect which is COATED with lead and a strange # H-out tube--26HU5, too. Hot, doubler, , compactrons.. NOT the quality of a Zenith, or even RCA or Mag..

GE cheaped out big time with the C1/L2 chassis after making a very reliable set in 1969-70 known as the KE and KE-II.

My uncle had one of these "appliance store specials" and you certainly got what you paid for. While easy to troubleshoot and keep on life support, they were nothing compared to a Zenith, Motorola WID or Sylvania OR even the Admiral, RCA, Mag and Philco in those days. The lousy tuners, short-lived 23VAGP22, and that 3DS3 lead covered rectifier tube was an added bonus

Electronic M · #10 10-11-2015, 02:31 AM

Quote:

Originally Posted by DavGoodlin

GE cheaped out big time with the C1/L2 chassis after making a very reliable set in 1969-70 known as the KE and KE-II.

My uncle had one of these "appliance store specials" and you certainly got what you paid for. While easy to troubleshoot and keep on life support, they were nothing compared to a Zenith, Motorola WID or Sylvania OR even the Admiral, RCA, Mag and Philco in those days. The lousy tuners, short-lived 23VAGP22, and that 3DS3 lead covered rectifier tube was an added bonus

Well now I know why I have no raster on it. The HV is only 4-6KV. Damper and H-out are good, B+ lines seem okay, but I can't find test settings to test the 3DS3 HV rect in my B&K 606.....Though the arc from the top cap suggests it is not the problem.
I may need a schematic for it.

Electronic M · #11 10-12-2015, 11:16 PM

Quote:

Originally Posted by WISCOJIM

Interesting modulator. Hope you can find the schematic and specifications on it.

I decided to make my own schematic of it, and a thread on it.
http://videokarma.org/showthread.php...65#post3146365
The darn thing is somehow still plugging along just fine on it's original parts!

Quote:

Originally Posted by Olorin67

i have some tube audio only modulators, once used by a hotel to put radio station audio on to unused Tv frequencies, so guests could get radio in addition to Tv. Would it be practical to combine the outputs to get both video and sound?

I'd be interested in trying that now that I know I have a working unit.

BigDavesTV · #12 10-06-2015, 06:15 PM

Tom I'm glad you got the Zenith! Looks like the Maggie is off to a good start already. I'm interested to see how the Teledyne Pacific Bell GE turns out, I like all those sets! Very glad a big spider didn't run out of anything that I brought home, I always unload and inspect stuff in the garage, before bringing inside! The meet was a good time in my opinion, I am very glad we were there.

***Kamakiri*** · #13 10-06-2015, 07:26 PM

I picked up 3 sets

.

There ain't no spiders on me
There ain't no spiders on me
There might be spiders on some of you guys, but
There ain't no spiders on me

The Admiral Solarcolor I got from Dave I'm all excited about! That gets done after the GE 830 on my bench....

Picture tube actually tests great, it's got a weak blue drive and a slight hiss under the chassis. Most of the tubes in it are so weird my tester won't do them

Here's the rest of what I brought back

http://www.videokarma.org/showpost.p...12&postcount=4

And pics I shot while there!

http://www.videokarma.org/showpost.p...10&postcount=2

sampson159 · #14 10-06-2015, 08:29 PM

cant wait to see pics of that set working.i bought the same vdc tube that you did.tim.installed it today in my sylvania e45 with electronic tuning.the picture is stunning!bright and sharp.you will be shocked when you get yours in and working
here are pics of the e 45 sylvania with the vdc 90 degree universal crt purchased at the etf swap meet.cant wait to see tims admiral with this picture tube installed

rca2000 · #15 10-06-2015, 10:42 PM

The Zenith ACCIDENTLY...got placed in the shed behind my house many years ago. I came across it IIRC in about this time of 1997. I briefly played a bit with then...found out it DID get a picture at the time (not sure if it had COLOR ofr not then though...). and somehow...it ended up in my shed...forgotten about. I could NOT find it...when people asked about it a few times over the last 10 or so years,,,,but I KNEW...i STILL had it.

Then...last year....I was in that shed....ans SAW a corner of it. But there was a BIG wasp/bumblebee nest near it...making it IMPOSSIBLE for me to get it....till this last spring.,

I dragged it out....and checked it out again. it STILL came on...wiht a raster. It did NOT have that crap in it...at the time. I cleaned it out pretty well. But....I put it on my back porch UNDER a cover...but evidently...SOMEHOW..."something got to it" under there. And...it would NOT come on anymore...saturday....either.

SO...I am GALD it has been "passed on" to someone else who WILL care for it BETTER than I did...and bring it back to it's glory. I kept it out of the dump for 18 years...now...HOPEFULLY....it has a new, better home.