Hello All,

I' have built a shielded loop for SW (1M diameter) which works very nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by Lyle Koehler -

As I live on a boat and there no electronic shop within 500 km from where I live, I wonder if any of you know if it is possible to order a kit
for that amplifier on the Net ( or any other preamplifier which is similar to Lyle's ).

Any advice ?

73

Niki

You might want to check out the loopantennas yahoo
group.


--- "N.Kantor" <nkantor@...> wrote:

Hello All,

I' have built a shielded loop for SW (1M diameter)
which works very
nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by
Lyle Koehler -


As I live on a boat and there no electronic shop
within 500 km from
where I live, I wonder if any of you know if it is
possible to order a
kit
for that amplifier on the Net ( or any other
preamplifier which is
similar to Lyle's ).

Any advice ?

73

Niki

_______________________________
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Niki,

Lyle Koehler's preamp works very well but I don't know of any source
of a kit for it. The parts are all relatively common and should be
available from any number of mail-order sources.

73,

'Bear' NH7SR

--- In loopantennas@..., "N.Kantor" <nkantor@m...> wrote:

Hello All,

I' have built a shielded loop for SW (1M diameter) which works very
nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by Lyle Koehler -

As I live on a boat and there no electronic shop within 500 km from
where I live, I wonder if any of you know if it is possible to

order a

kit
for that amplifier on the Net ( or any other preamplifier which is
similar to Lyle's ).

Any advice ?

73

Niki

Ramsey sells a kit that should work, you can order direct or from one
of the several electronics suppliers that carry their products ...


preadd=action&key=AA7C

You can look at the manual here, unfortunately the schematic has been
redacted ....



John

--- In loopantennas@..., "N.Kantor" <nkantor@m...> wrote:

Hello All,

I' have built a shielded loop for SW (1M diameter) which works very
nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by Lyle Koehler -

As I live on a boat and there no electronic shop within 500 km from
where I live, I wonder if any of you know if it is possible to

order a

kit
for that amplifier on the Net ( or any other preamplifier which is
similar to Lyle's ).

Any advice ?

73

Niki

Bear and Scott (and all),

Thanks for prompt reply :).

Michael, Could you please recommend one or two of these "mail-order sources", ones which you know.

I still prefer to wait and see if someone can recommend a kit, if not, i'll take Bear's advice.

Thanks and 73,

Niki

Uh... we are all on the Loopantennas list already. ;')

Steve

--- Scott Erwin <n4zou@...> wrote:

You might want to check out the loopantennas yahoo
group.

=====
Steve Greenfield // Digital photography, scanning,
Polymorph Digital Photography // retouching, and photomorphing
253-318-2473 voice // to your specs.
polymorph@... //
// Based in Tacoma, WA, USA

开云体育

Niki,

The parts should be available from Mouser Electronics, Digikey, Ocean
State Electronics, Dan's Small Parts and a number of other sources.
Ocean State's online catalog is probably the easiest to navigate.

73,

'Bear' NH7SR

--- In loopantennas@..., "N.Kantor" <nkantor@m...> wrote:

Bear and Scott (and all),

Thanks for prompt reply :).

Michael, Could you please recommend one or two of these "mail-order
sources", ones which you know.

I still prefer to wait and see if someone can recommend a kit, if

not,

i'll take Bear's advice.

Thanks and 73,

Niki

John,

I wouldn't recommend a Ramsey kit to anyone. Their components are the
cheapest possible grade, the circuitry uses minimal bypassing and
decoupling and board quality very poor. You can buy good quality
components and build your own properly performing unit for less than
the cost of a Ramsey kit.

I've been burnt by their shoddy products too often and will never buy
another one.

73,

'Bear' NH7SR

--- In loopantennas@..., SG2112@y... wrote:

Ramsey sells a kit that should work, you can order direct or from

one

of the several electronics suppliers that carry their products ...


preadd=action&key=AA7C

You can look at the manual here, unfortunately the schematic has

been

redacted ....



John

--- In loopantennas@..., "N.Kantor" <nkantor@m...>

wrote:

Hello All,

I' have built a shielded loop for SW (1M diameter) which works

very

nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by Lyle

Koehler -

As I live on a boat and there no electronic shop within 500 km

from

where I live, I wonder if any of you know if it is possible to

order a

kit
for that amplifier on the Net ( or any other preamplifier which

is

similar to Lyle's ).

Any advice ?

73

Niki

Hello to all,

Thanks for all how replied.

Did somebody try using the R.F. AMPLIFER KIT on Ocean State Electronics
( ) ?

they say :" A small circuit, using the Mar-6 Amplifier IC, this kit
will provide? as much as 20 db gain.
Connect at receiving antenna input; will?boost signals from 1 mhz to
1000mHz; two RF amplifier kits may
be cascaded for use at low, broadcast-band frequencies. Use
with?Scanners, Ham recievers, SWL reciever etc.
You could add a metal?case and RF connectors for permanent use. May be
used to boost signal for scope or frequency
counter as well"

73,

Niki

开云体育

----- Original Message -----

From: Michael Hebert

To: loopantennas@...

Sent: Sunday, October 24, 2004 1:06 AM

Subject: [loopantennas] Re: Preamplifier

>>>I wouldn't recommend a Ramsey kit to anyone. Their components are the
cheapest possible grade<<<<

You've got it! I purchased their AA7 several years ago with their enclosure. I guess the amp did a fair job but?I wouldn't have given fifty cents for the $15 enclosure if I had seen before?I ordered it.

I would advise anyone who thinks they have to try the AA7, don't buy the enclosure build your own or fit it to a Bud box. RM~

?

PS, If anyone is still not convinced, I'll make you a real deal (absolutely no guarantees)?on a hardly used?AA7 complete with factory enclosure. :(

Thanks Bear .... Since I don't do things from a kit (for the same
reasons you already noted) I wasn't aware Ramsey had a problem ... I
just seem them in all the electronics catalog's kits section ...
I also remember seeing their circuits in the old Radio-Electronics
and Popular Electronics magazines in the late 80's and early 90's
--- In loopantennas@..., "Michael Hebert" <qrpbear@y...>
wrote:

John,

I wouldn't recommend a Ramsey kit to anyone. Their components are

the

cheapest possible grade, the circuitry uses minimal bypassing and
decoupling and board quality very poor. You can buy good quality
components and build your own properly performing unit for less

than

the cost of a Ramsey kit.

I've been burnt by their shoddy products too often and will never

buy

another one.

73,

'Bear' NH7SR

--- In loopantennas@..., SG2112@y... wrote:

Ramsey sells a kit that should work, you can order direct or from

one

of the several electronics suppliers that carry their products ...


preadd=action&key=AA7C

You can look at the manual here, unfortunately the schematic has

been

redacted ....



John

--- In loopantennas@..., "N.Kantor" <nkantor@m...>

wrote:

Hello All,

I' have built a shielded loop for SW (1M diameter) which works

very

nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by Lyle

Koehler -

As I live on a boat and there no electronic shop within 500 km

from

where I live, I wonder if any of you know if it is possible to

order a

kit
for that amplifier on the Net ( or any other preamplifier which

is

similar to Lyle's ).

Any advice ?

73

Niki

That's how you launch a new kit product... write it up as a DIY
project for a magazine, casually mention that a kit is available
buried in the parts list and buy some advertising space in the
magazine. A lot of magazines are just as hard up for articles as they
are for advertising money. This gives them a free article _and_ some
advertising money (mebbe at a one-month reduced rate or one month
free, though).

Ramsey's designs aren't bad, per se, they just tend to be rather
minimal. Some attention to niceties like power supply decoupling,
selection of quality components and a decent circuit board material
and layout can make a big difference between something that works
marginally well and something that works very well.

73,

'Bear' NH7SR

--- In loopantennas@..., SG2112@y... wrote:

Thanks Bear .... Since I don't do things from a kit (for the same
reasons you already noted) I wasn't aware Ramsey had a problem ...

I

just seem them in all the electronics catalog's kits section ...
I also remember seeing their circuits in the old Radio-Electronics
and Popular Electronics magazines in the late 80's and early 90's
--- In loopantennas@..., "Michael Hebert"

<qrpbear@y...>

wrote:

John,

I wouldn't recommend a Ramsey kit to anyone. Their components are

the

cheapest possible grade, the circuitry uses minimal bypassing and
decoupling and board quality very poor. You can buy good quality
components and build your own properly performing unit for less

than

the cost of a Ramsey kit.

I've been burnt by their shoddy products too often and will never

buy

another one.

73,

'Bear' NH7SR

--- In loopantennas@..., SG2112@y... wrote:

Ramsey sells a kit that should work, you can order direct or

from

one

of the several electronics suppliers that carry their

products ...

preadd=action&key=AA7C

You can look at the manual here, unfortunately the schematic

has

been

redacted ....



John

--- In loopantennas@..., "N.Kantor" <nkantor@m...>

wrote:

Hello All,

I' have built a shielded loop for SW (1M diameter) which

works

very

nice.

Now I want to build a preamplifier for that antenna.

I have found a scheme for an amplifier on the Net by Lyle

Koehler -

As I live on a boat and there no electronic shop within 500

km

from

where I live, I wonder if any of you know if it is possible

to

order a

kit
for that amplifier on the Net ( or any other preamplifier

which

is

similar to Lyle's ).

Any advice ?

73

Niki