Maker Pro
Maker Pro

awesome

J

John Larkin

Jan 1, 1970
0
John Larkin wrote...

Whether it's awesome or not depends on the price.


That's awesome too. $120 in small quantity.

John
 
J

John Larkin

Jan 1, 1970
0
It certainly is, Ollie!

120 volts. 90 watts. 25 amps. 8 mhos. 200 C. All I need to know now
are the capacitances.

Can it be used at lower frequencies, such as 2.5Ghz?

I want to use it in a wideband amp, 1-250 MHz maybe. It's input
matched for 3.5 GHz, so I figure the matching will be invisible at 250
MHz, practically DC. At 2.5 Ghz it should be partially matched, but
probably tunable. The drain is unmatched, fine with me.

As soon as I blow one up, I'll open the can and see what's inside.


John
 
J

John Popelish

Jan 1, 1970
0
Bob said:
How can its maximum operating junction temperature be greater than its
maximum storage temperature?

If the junction was not the most temperature sensitive part of the
assembly.
 
R

Roy L. Fuchs

Jan 1, 1970
0
120 volts. 90 watts. 25 amps. 8 mhos. 200 C. All I need to know now
are the capacitances.



I want to use it in a wideband amp, 1-250 MHz maybe. It's input
matched for 3.5 GHz, so I figure the matching will be invisible at 250
MHz, practically DC. At 2.5 Ghz it should be partially matched, but
probably tunable. The drain is unmatched, fine with me.

As soon as I blow one up, I'll open the can and see what's inside.

Well, they have no devices yet from what I was told. Maybe in a
year or so.
 
S

Spehro Pefhany

Jan 1, 1970
0
120 volts. 90 watts. 25 amps. 8 mhos. 200 C. All I need to know now
are the capacitances.

Those things really leak a lot- several watts could be lost to leakage
in the 'off' condition.
I want to use it in a wideband amp, 1-250 MHz maybe. It's input
matched for 3.5 GHz, so I figure the matching will be invisible at 250
MHz, practically DC. At 2.5 Ghz it should be partially matched, but
probably tunable. The drain is unmatched, fine with me.

Might make a nice audiophile class-A amplifier.
As soon as I blow one up, I'll open the can and see what's inside.


John


Best regards,
Spehro Pefhany
 
R

Roy L. Fuchs

Jan 1, 1970
0
Might make a nice audiophile class-A amplifier.

Actually, that RF centric device would be quite expensive to
incorporate into an audio amp, regardless of whether it would work or
not. There a far far cheaper devices that are as good as they need to
be for such a design.
 
S

Spehro Pefhany

Jan 1, 1970
0
Actually, that RF centric device would be quite expensive to
incorporate into an audio amp, regardless of whether it would work or
not. There a far far cheaper devices that are as good as they need to
be for such a design.

Seems kind of open-ended. Surely if these guys can hear a staggering
difference between cheap and expensive AC line sockets, response well
into the hundreds of MHz may not be overkill.


Best regards,
Spehro Pefhany
 
K

Ken Smith

Jan 1, 1970
0
Spehro Pefhany said:
Seems kind of open-ended. Surely if these guys can hear a staggering
difference between cheap and expensive AC line sockets, response well
into the hundreds of MHz may not be overkill.

Make that "phase linearity" any you'll sell more.
 
R

Roy L. Fuchs

Jan 1, 1970
0
Seems kind of open-ended.

I was talking about price, not working capacity.
Surely if these guys can hear a staggering
difference between cheap and expensive AC line sockets, response well
into the hundreds of MHz may not be overkill.

Gold cans likely are though.
 
J

John Larkin

Jan 1, 1970
0
Well, they have no devices yet from what I was told. Maybe in a
year or so.

The rep dropped off an eval board here, with a gadget on it. He claims
we can get parts, but these exotic semiconductors do always seem to be
six months off. They've added a "P" in the front of the part number,
on the pdf datasheet, and he claims that means "production." We'll
see.

When/if we can get them, they will be a pretty radical change to the
way people design wideband RF power amps.

John
 
J

John Larkin

Jan 1, 1970
0
Those things really leak a lot- several watts could be lost to leakage
in the 'off' condition.


Like the old germanium transistor amps with just a cap into the
base... self biasing! But a few watts of leakage won't be lethal for a
200 watt class AB push-pull amp, probably less than the normal
quiescent power.

John
 
J

John Larkin

Jan 1, 1970
0
Actually, that RF centric device would be quite expensive to
incorporate into an audio amp, regardless of whether it would work or
not. There a far far cheaper devices that are as good as they need to
be for such a design.

Still cheaper than a 300B.

John
 
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