Ts18 verticle problem

[timmy]

OH ok I'll look then I'll look for a 22 meg or make one up. I do remember I didn't get anything different after putting in that 2.2 so I'll get on that and let you know.

[timmy]

Ok, you guys nailed it, lol, omg what a headache yes it was a 22 meg so next time I will be double checking the parts list and I know better I have had problems like this befor with SAMs. So in anyone's opinion rather then an exact 22 meg which may be better, 15,16, 18 meg I don't want to go over 22 meg. And the vert hold is about maxed so I'm going to add a resistor but the wiper is closest to the ground end so should I increase or decrease the value, I think in the beginning I paralleled a resistor to the I think it's 3.3 meg at the pot to have it at least mid point. I guess it's age within the pot. And again thanks very much for all the help now it's yet another learning experience for me. What value should I start with on the pot. Thanks. Ok well I decided to leave the vert hold alone even though it's close to a quarter befor the end but it locks strong and the 22 meg I wound up putting in a resistor close to 19 meg and the vert size is good and chances are if I had put in 22 meg it may change the position of the vert hold toward the half mark.

[timmy]

Here is the final result although it's a green tube because the tube that came with the set is on the dark side but watchable but I'm not going to use it.

[EdKozk2]

Picture looks good Timmy.

[kvflyer]

A little late to the party (as usual). Here is a scan of a Motorola schematic, dated 20 December, 1949. It is from the Motorola Company, not Sams etc.

[timmy]

Yes I see r61 22 meg my mistake had I not checked that resistor befor I replaced all the Micas in the verticle because I changed the resistor then tried it and was no good then I changed the Micas and still no good when all along it was the Micas and not that resistor. I had problems befor with SAMs and I should have know to compare the parts list with the schematic. Again my mistake because I thought the resistor was red, red, green 2.2 meg, instead it was red, red, blue 22 meg. Thanks

[jr_tech]

Because of this thread, I chose a TS18 chassis set as my next restoration victim. This is a 7VT2, like shown here:

http://www.tvhistory.tv/1949-Motorola-7VT2.JPG

This looks like a fun project, getting a little tired of doing RCA 8PT70xx sets and needed a change of pace. I verified that r-59 (Sams#) is indeed 22 meg and tests pretty close. Ballast is open, so I am working out a substitute.

jr

[timmy]

Electrostatic yes it's a change from the other .

[timmy]

I have several of these 7 inch sets all hooked up and I seemed to develope these lines up and down on all the sets so I added an amplifier to the antenna and it cured it but just yesterday this one set got the lines back and have no clue what else would do this. All the others are crystal clear and all share the same ant line.

[jr_tech]

Does it still display the lines if it is the only set turned on?

jr

[timmy]

Originally Posted by jr_tech

Does it still display the lines if it is the only set turned on?

jr

All the other sets on lines are there and when they are off ,however I took the set to the beginning of the ant string, stronger signal and no lines but this is the set with the annoying hum in the audio so even though I checked the tubes for any heater cathode shorts, showed none but I'm thinking there is a tube in the IF that may have a short causing the hum as well as the lack of the set to operate with the signal that's there since the others work fine.

[Electronic M]

Originally Posted by timmy

I have several of these 7 inch sets all hooked up and I seemed to develope these lines up and down on all the sets so I added an amplifier to the antenna and it cured it but just yesterday this one set got the lines back and have no clue what else would do this. All the others are crystal clear and all share the same ant line.

If all the sets were exhibiting it with a weak signal then it makes me think it is an RF interference issue. Are there any local DTV carriers (beware 'virtual' channels that report a different channel number than their actual carrier) on or adjacent to the channel your using? If you nix the RF amp and hook up a CRT TV from the 80's-00's does it display the same symptoms?

[timmy]

Originally Posted by Electronic M

If all the sets were exhibiting it with a weak signal then it makes me think it is an RF interference issue. Are there any local DTV carriers (beware 'virtual' channels that report a different channel number than their actual carrier) on or adjacent to the channel your using? If you nix the RF amp and hook up a CRT TV from the 80's-00's does it display the same symptoms?

In the last post what I meant was all the other sets are fine no lines but weather the others are on or off the one set has the lines. So the problem is the one set.

[Electronic M]

Originally Posted by timmy

In the last post what I meant was all the other sets are fine no lines but weather the others are on or off the one set has the lines. So the problem is the one set.

I was responding to an older post....I edited to include a quote of what I was replying to.