Use microwave oven chassis for a radio?
 

I recently tore another microwave oven apart for the two really-strong
magnets that are in the tube

(they are fun to stack alternate-polarity on a wooden dowel
so they seem to "float" in the air; kids of all ages just
love to play that that "toy")

(I kept the transformer, diode, capacitor, and misc. microswitches, too),

and as I carried the rather bare chassis out to the garbage-can area,
I wondered if anyone had ever tried built an amplifier in such a chassis
-- maybe even using some of its many interlocks?
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)

On 12 Sep 2005 23:01:40 -0500, wrote:

I recently tore another microwave oven apart for the two really-strong
magnets that are in the tube

(they are fun to stack alternate-polarity on a wooden dowel
so they seem to "float" in the air; kids of all ages just
love to play that that "toy")

(I kept the transformer, diode, capacitor, and misc. microswitches, too),

and as I carried the rather bare chassis out to the garbage-can area,
I wondered if anyone had ever tried built an amplifier in such a chassis
-- maybe even using some of its many interlocks?
No, but the tube runs at a freq real close to ham Slow Scan TV bands.
They retune them and use them as SSTV transmitters.

Huh??? I would think you wouldn't need slow-scan TV in the microwave
portion of the ham bands.. There is more then enough bandwidth available for
many fast scan TV signals.. Or maybe I'm missing something..

Joe AG4QC
wrote in message
...
On 12 Sep 2005 23:01:40 -0500, wrote:

I recently tore another microwave oven apart for the two really-strong
magnets that are in the tube

(they are fun to stack alternate-polarity on a wooden dowel
so they seem to "float" in the air; kids of all ages just
love to play that that "toy")

(I kept the transformer, diode, capacitor, and misc. microswitches, too),

and as I carried the rather bare chassis out to the garbage-can area,
I wondered if anyone had ever tried built an amplifier in such a chassis
-- maybe even using some of its many interlocks?
No, but the tube runs at a freq real close to ham Slow Scan TV bands.
They retune them and use them as SSTV transmitters.

"Joel" ) writes:
Huh??? I would think you wouldn't need slow-scan TV in the microwave
portion of the ham bands.. There is more then enough bandwidth available for
many fast scan TV signals.. Or maybe I'm missing something..

Joe AG4QC

It was a nonsense reply, though I couldn't decide whether he was trolling
or actually didn't hav e a clue.

Michael VE2BVW

wrote in message
...
On 12 Sep 2005 23:01:40 -0500, wrote:

I recently tore another microwave oven apart for the two really-strong
magnets that are in the tube

(they are fun to stack alternate-polarity on a wooden dowel
so they seem to "float" in the air; kids of all ages just
love to play that that "toy")

(I kept the transformer, diode, capacitor, and misc. microswitches, too),

and as I carried the rather bare chassis out to the garbage-can area,
I wondered if anyone had ever tried built an amplifier in such a chassis
-- maybe even using some of its many interlocks?
No, but the tube runs at a freq real close to ham Slow Scan TV bands.
They retune them and use them as SSTV transmitters.

Michael Black wrote:

It was a nonsense reply, though I couldn't decide whether he was trolling
or actually didn't hav e a clue.

Michael VE2BVW


Hardly the case Michael ---- Dr. Calhoun is a distinguished retired
professor of Electrical Engineering at KSU. "Trolling and/or doesn't
have a clue".....no, I really don't think so. His original post seemed
serious, on-topic, and factually correct especially compared to some of
the other crap that gets posted here. What made you think it might be
otherwise ?

73s

Justa Lurker ) writes:
Michael Black wrote:

It was a nonsense reply, though I couldn't decide whether he was trolling
or actually didn't hav e a clue.

Michael VE2BVW


Hardly the case Michael ---- Dr. Calhoun is a distinguished retired
professor of Electrical Engineering at KSU. "Trolling and/or doesn't
have a clue".....no, I really don't think so. His original post seemed
serious, on-topic, and factually correct especially compared to some of
the other crap that gets posted here. What made you think it might be
otherwise ?

73s

I can't be held responsible for top-posters.

If you'd paid attention, the post I replied to was a top post, and he
was referring to the nonsense reply to the original post.

Note I specifically said "reply", as in
" No, but the tube runs at a freq real close to ham Slow Scan TV bands.
They retune them and use them as SSTV transmitters."
which makes absolutely no sense, since SSTV is commonly used on HF.

Michael VE2BVW

I recently tore another microwave oven apart for the two really-strong
....[snip]....
and as I carried the rather bare chassis out to the garbage-can area,
I wondered if anyone had ever tried built an amplifier in such a chassis
-- maybe even using some of its many interlocks?

...[someone mentioned using the microwave tube...snip...]...

I wasn't asking about re-using the microwave TUBE but the CHASSIS and
maybe the interlocks and the cooling fan (I forgot to mention that in
my original posting). If the new RF tube(s) would fit, the shielding
at HF should be superb(!), yet one could still see the warm glow of
the tubes through the grilled door.

--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)

There was a fellow in Central Ohio in the late 80's that used a
microwave oven as a fast scan TV transmitter on 2.4Ghz. The details
are very hazy in my mind and I don't recall actually seeing his
signal.

He started with a new unit from a discount store. Feedline losses were
a major problem, he eventually put the thing on top of the tower.
Needless to say, experimenting with a tower mounted transmitter can
bring a whole new set of problems. Especially one that heavy.

I don't want to discourage tower mounting though. About the same time
I had a QRP ATV transmitter at 1296mhz at the tower top that worked
well.



On Tue, 13 Sep 2005 20:20:57 -0400, wrote:

On 12 Sep 2005 23:01:40 -0500, wrote:

I recently tore another microwave oven apart for the two really-strong
magnets that are in the tube

(they are fun to stack alternate-polarity on a wooden dowel
so they seem to "float" in the air; kids of all ages just
love to play that that "toy")

(I kept the transformer, diode, capacitor, and misc. microswitches, too),

and as I carried the rather bare chassis out to the garbage-can area,
I wondered if anyone had ever tried built an amplifier in such a chassis
-- maybe even using some of its many interlocks?
No, but the tube runs at a freq real close to ham Slow Scan TV bands.
They retune them and use them as SSTV transmitters.