Rare Sharp 2U-121C B&W Vacuum Tube TV - Videokarma.org TV - Video

Robb · #1 08-29-2013, 04:48 PM

Quote:

Originally Posted by Jeffhs

How do you know the set "works"?

Your Youtube video shows the set getting nothing at all on any channel except snow.

Because if set turns on ans shows snow, it works.

zeno · #2 09-02-2013, 08:25 PM

Quote:

Originally Posted by Robb

Because if set turns on ans shows snow, it works.

Robb is correct. I used to tell Jr. techs about "good snow" &
"bad snow". You can tell a lot by how the snow looks. Streaky or
weak snow is bad. Lack of snow is worse. Nice sharp snow & a
nice waterfall in the audio is a beautiful thing. If you have a
good snow picture you will almost always get a very nice picture.
You may get a snowy pix but a new RF amp or mixer/osc will
take care of that. Kind of strange since most of the snow is
noise that is generated inside the TV............

73 Zeno

compucat · #3 09-03-2013, 07:40 AM

Quote:

Originally Posted by zeno

Robb is correct. I used to tell Jr. techs about "good snow" &
"bad snow". You can tell a lot by how the snow looks. Streaky or
weak snow is bad. Lack of snow is worse. Nice sharp snow & a
nice waterfall in the audio is a beautiful thing. If you have a
good snow picture you will almost always get a very nice picture.
You may get a snowy pix but a new RF amp or mixer/osc will
take care of that. Kind of strange since most of the snow is
noise that is generated inside the TV............

73 Zeno

Sets with more I.F. stages will produce more snow. I have noticed that 1940s sets, especially the lower end models will even when working correctly not produce much if any snow on unoccupied channels.