In article ,
John Smith wrote:

Dave wrote:

...
The IMD is way worse than the Minicircuits device Telemon referenced.

Telemondo is plonked, here ... :-)

You still read my posts.

And, would be similar to the device I referenced:

http://www.sirenza.com/documents/pro..._Datasheet.pdf

There is a diagram, on the above sheet, which shows it mounted on an
evaluation board ...

Why are you using a silicon/germanium RF transistor rated to 5 GHz for
HF? A little overkill there don't you think?

--
Telamon
Ventura, California

John Smith wrote:
flashdrive wrote:

...
I referenced the Minicircuits MMIC. I think the specs look pretty good
for a MW/HF loop pre-amp. I wonder if Wellbrook uses a MMIC?

I doubt it. I would think their bottom line would be cost and they
would be using the cheapest components available ...

Regards,
JS

Wellbrook doesn't give off that kind of vibe.

John Smith wrote:
Dave wrote:

...
I use these for UHF receiver boosting.

http://www.minicircuits.com/pdfs/HELA-10.pdf

I don't have any need for balanced input/output, nor the cost of
interfacing, the between-lead spacing of .022 in. is out of the
questing, too easy to bridge between pins ... IMHO.

Regards,
JS

I gave you two versions of the same preceison amp, in answer to your
example of a mediocre amp. If the leads are too close together get the
unit in a case, with 50 Ohms in and out.

Telemon is right though, the original thread was about HF, and the 3
term device that the other guys referenced, or even the 3 term device
Ten-Tec used 8 years ago, are superior to your little 40 mW MMIC.

On Jan 1, 5:41*pm, flashdrive wrote:
Dave wrote:
John Smith wrote:

John Smith wrote:

...
How about this:

http://cgi.ebay.com/Sirenza-SGA-4586...of-10-RF-Ampli....

(take care with line wrapping of the URL, above)

10 for $10.00 plus $2.50 USD -- comes to $1.25 a piece, and provides
for a fatal error in construction/use.

They are a bit small, sharpen your soldering iron, but should be
easily "do-able."

Regards,
JS

Soldering the device(s) would be similar to this:

http://www.youtube.com/watch?v=kAADF...eature=related

Regards,
JS

The IMD is way worse than the Minicircuits device Telemon referenced.

- I referenced the Minicircuits MMIC.
- I think the specs look pretty good for a MW/HF loop pre-amp.
- I wonder if Wellbrook uses a MMIC?

Why bother with Wellbrook ?

Active 3-30 MHz "Hula-Loop" Antenna for Shortwave
http://www.techlib.com/electronics/antennas.html
The "Loopifier" ! [Loop-I-Fier] -by- Charles Wenzel
Copyright 1995 & Updated 2000

iane ~ RHF

RHF wrote:

...
Active 3-30 MHz "Hula-Loop" Antenna for Shortwave
http://www.techlib.com/electronics/antennas.html
The "Loopifier" ! [Loop-I-Fier] -by- Charles Wenzel
Copyright 1995 & Updated 2000

iane ~ RHF
.


His construction of the loop looks workable, feed its' output to a MMIC,
to simplify parts/construction, and you are good to go ...

Regards,
JS

On Jan 2, 4:37*pm, RHF wrote:
On Jan 1, 5:41*pm, flashdrive wrote:

Dave wrote:
John Smith wrote:

John Smith wrote:

...
How about this:

http://cgi.ebay.com/Sirenza-SGA-4586...of-10-RF-Ampli...

(take care with line wrapping of the URL, above)

10 for $10.00 plus $2.50 USD -- comes to $1.25 a piece, and provides
for a fatal error in construction/use.

They are a bit small, sharpen your soldering iron, but should be
easily "do-able."

Regards,
JS

Soldering the device(s) would be similar to this:

http://www.youtube.com/watch?v=kAADF...eature=related

Regards,
JS

The IMD is way worse than the Minicircuits device Telemon referenced.

- I referenced the Minicircuits MMIC.
- I think the specs look pretty good for a MW/HF loop pre-amp.
- - I wonder if Wellbrook uses a MMIC?

- Why bother with Wellbrook ?
-
- Active 3-30 MHz "Hula-Loop" Antenna for Shortwave
- http://www.techlib.com/electronics/antennas.html
- The "Loopifier" ! [Loop-I-Fier] -by- Charles Wenzel
- Copyright 1995 & Updated 2000
-
- iane ~ RHF
- *.

Magnetna Loop Antena
http://users.triera.net/zupanbra/drm/antena.html
{Passive Coax Cable 'Magnetic" Tuned Loop Antenna}

Aktivna Antena za DRM
http://users.triera.net/zupanbra/drm/antena.html
{Active Broadband Loop Antenna for DRM}

PA0RDT Mini-Whip Antenna
http://users.triera.net/zupanbra/drm/antena.html
http://users.triera.net/zupanbra/pdf/mini-whip_SCH.pdf
http://users.triera.net/zupanbra/pdf/miniwhip_TIV.pdf

shortwave radio reception starts with
your antenna - iane ~ RHF {pomkia}

John Smith wrote:
Dave wrote:

...
Wellbrook doesn't give off that kind of vibe.

What kind of "vibes" are you getting from your
Ouji-Board/psychic-abilities about Obama?

Inquiring minds wanna know, ya' know? ;-)

Regards,
JS

He's normal.

John Smith wrote:
Dave wrote:

...
I gave you two versions of the same preceison amp, in answer to your
example of a mediocre amp. If the leads are too close together get
the unit in a case, with 50 Ohms in and out.

Telemon is right though, the original thread was about HF, and the 3
term device that the other guys referenced, or even the 3 term device
Ten-Tec used 8 years ago, are superior to your little 40 mW MMIC.

I think the device I gave is easily available and cheap, large enough to
easily solder, etc., and not only that, but it would more than
suffice--I'd say that was nothing short of excellent, acceptable noise
figure also. Me thinks you look for a problem to satisfy more than
actual needs and fitness for duty--your ego possibly?

I just don't see Ghz capabilities being a problem, so why you would
think only requiring HF capabilities from it is any sort of a problem.
Indeed, with switchable filters in front of it, you could use it to scan
for wifi points ...

I suppose I could spend anything I wanted, a $1.25 per unit sounds good
to me ...

Regards,
JS

I deal with multiple carriers in the passband and I have to see an IP3
at least in the upper 30s.

John Smith wrote:
Dave wrote:

...
I deal with multiple carriers in the passband and I have to see an IP3
at least in the upper 30s.

Without a doubt, for any possible solution(s) a person(s) could come up
with--a special case(s) could be found to negate fitness for purpose ...

Any good college debate class will quickly teach someone that point--the
first day of class!

Regards,
JS

???

On Jan 3, 11:41*am, John Smith wrote:
Dave wrote:
...
I deal with multiple carriers in the passband and I have to see an IP3
at least in the upper 30s.

Without a doubt, for any possible solution(s) a person(s) could come up
with--a special case(s) could be found to negate fitness for purpose ...

- Any good college debate class will quickly teach
- someone that point--the first day of class!
-
- Regards,
- JS

JS,

Sounds like you are a pretty good 'debater' yourself.

maybe you studied under mwb ? ;-} ~ RHF