R
Radiosrfun
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"Meat Plow" <meat@petitmorte.net> wrote in message
news:14mo8d.vh1.19.3@news.alt.net...
light up and still fail to perform properly. Your issue - description
"seems" to suggest a "Power Supply" issue ("maybe") - not feeding voltage to
RF/IF/Audio stages and not enough going to the leg to feed the "High
Voltage" section to supply the picture tube. Of course - with an old set -
most anything could be wrong and it could also be multiple issues. But the
best place to start - is the Power Supply from the AC in - checking voltages
to see where they cease to be normal. A schematic would really help tracing
voltages - hopefully you can read it. Taking voltages can be dangerous if
you're not familiar with doing so. Get someone near you who has experience -
if you have no experience, you/your family will be a lot safer for it.
Getting the RF/IF/Audio stages of the set working may not be so tough - just
hope the "picture tube" is still working to give you a picture! Good luck -
and BE CAREFUL.
news:14mo8d.vh1.19.3@news.alt.net...
Just because "all the tubes light up" - doesn't mean anything. Any tube canOn Wed, 01 Aug 2007 02:51:13 -0500, fartblanket wrote:
I'm trying to fix this antique black and white tv.
There's a part in the tv that says .001 uufd on it. On the other side
it looks like a domino with 6 colored dots. The dots are different
colors, the thing is rectangular with a wire on each end. It is about
1 inch long a half inch wide and 1/8 inch thick. Flat package. I
know it's not a chip or power transistor becaue this is a tube tv set.
It dont look like a resistor. Capacitors are usually labelled MFD
(microfarad). What the heck is uufd?
These antique electronics sure have some weird parts, even though they
are built like army tanks.
I wish I had a tube tester....... They all light up !
Another thing. I notice corrosion around one of the filter caps. I
bet it's leaking. It's a metal can about 4 inches tall, 1.5 inches in
diameter, and it has 3 leads on the bottom. (3 caps in one can)
It reads:
80mfd 600v
10mfd 450v
40mfd 450v
Where can I get a replacement?
I get nothing on the screen, but there is a loud hum coming from the
speaker, which happens to be a the weirdest speaker I ever saw. It's
got a coil where there would normally be a magnet and an extra set of
wires going to the chassis. No parts look burned.
Try asking in the right news group. There is an antique repair group for
radios but I know none for televison. Maybe someone in
sci.electronics.repair knows?
light up and still fail to perform properly. Your issue - description
"seems" to suggest a "Power Supply" issue ("maybe") - not feeding voltage to
RF/IF/Audio stages and not enough going to the leg to feed the "High
Voltage" section to supply the picture tube. Of course - with an old set -
most anything could be wrong and it could also be multiple issues. But the
best place to start - is the Power Supply from the AC in - checking voltages
to see where they cease to be normal. A schematic would really help tracing
voltages - hopefully you can read it. Taking voltages can be dangerous if
you're not familiar with doing so. Get someone near you who has experience -
if you have no experience, you/your family will be a lot safer for it.
Getting the RF/IF/Audio stages of the set working may not be so tough - just
hope the "picture tube" is still working to give you a picture! Good luck -
and BE CAREFUL.