TIP: avoiding dried up/blocked ink-jet carts

On Wednesday, April 11, 2018 at 4:14:03 AM UTC-4, GS wrote:

N_Cook <diverse@tcp.co.uk> wrote:
Printer only used monthly , perhaps when new then parking in the cart
dock at the side perhaps works, but not when years old.
A bit of a bind, but less of a bind than squirting air-duster etc to
unblock an ink cart etc etc. At the end of each session remove the carts.
Grab a couple of couple of large party balloons with the neck cut off.
Stretch over the active face of each cart with a drop of
meths/denatured-alcahol in each balloon and store on a ledge with balloons dangling.

My Canon I hardly use. It just uses ink even while off.

There. Now. Footing the bill of some nameless, faceless corporation wasn't that bad after all, was it?

 

[pfjw@aol.com]

On Wednesday, April 25, 2018 at 5:17:33 PM UTC-4, Chuck wrote:

The filaments in the finals in WWII tank transmitters ran white hot.
Had an early 20s Crosley radio which didn't have cathodes and the
filaments glowed orange. (RCA WD11s)

Transmitter tubes do tend to run hot. Similar to larger mercury rectifier tubes. In some cases, those had to be shielded (enclosed) due to UV emissions. Back in the day, I ran a 35mm projection set-up that used carbon-arc lights. They were driven by mercury rectifier tubes about 10" tall and in metal enclosures against the UV.

But standard receiving tubes, not so much. And modern microwave oven magnetrons, not at all.

Peter Wieck
Melrose Park, PA

 

[Ralph Mowery]

In article <56cad77f-1bbd-48e9-8259-4e86dca8fc76@googlegroups.com>,
peterwieck33@gmail.com says...

Transmitter tubes do tend to run hot. Similar to larger mercury rectifier tubes. In some cases, those had to be shielded (enclosed) due to UV emissions. Back in the day, I ran a 35mm projection set-up that used carbon-arc lights. They were driven by mercury rectifier tubes about 10" tall and in metal enclosures against the UV.

But standard receiving tubes, not so much. And modern microwave oven magnetrons, not at all.

Peter Wieck
Melrose Park, PA

As most transmitting tubes are only about 75% or less efficent, they
will run hot. A 1000 watt input tube will send out maybe 750 watts best
case, usually less, that is 250 watts or more heating the tube not
counting the filiment power.

If you do not think a receiving tube is hot, grab a power output tube of
an old All American 5 AM receiver, or for that mater, a 6aq5 or similar
in other receivers audio output stages with your fingers.