Antenna tuners
 

Hello, I rescently baught a 7600GR. I'm planning on putting up 80 to 90
foot longwire/random wire between my house and a large tree.

Any input on the following tuners? I'm a newbie with this kinda stuff.

http://www.mfjenterprises.com/produc...rodid=MFJ-1046

-and-

http://www.mfjenterprises.com/produc...odid=MFJ-1045C

Several have suggested a passive one. The list cost on these seems
rather high, are there cheaper tuner/preselector options without giving
up quality/usefullness?

Secondly, would a low pass filter still be useful with a tuner?

Thanks,
Bob

Bob wrote:

Hello, I rescently baught a 7600GR. I'm planning on putting up 80 to 90
foot longwire/random wire between my house and a large tree.

Any input on the following tuners? I'm a newbie with this kinda stuff.

http://www.mfjenterprises.com/produc...rodid=MFJ-1046

-and-

http://www.mfjenterprises.com/produc...odid=MFJ-1045C

Several have suggested a passive one. The list cost on these seems
rather high, are there cheaper tuner/preselector options without giving
up quality/usefullness?

Secondly, would a low pass filter still be useful with a tuner?

Thanks,
Bob

Of the two, I'd go for the passive one. You certainly won't need gain
with that setup.

If the preselector alone isn't enough, you might look to add a variable
attenuator to prevent overloading. You can make one of these dirt cheap.

But actually, I'd consider going with a much smaller antenna, away from
the house with an impedance matching transformer, and use the savings to
start a table top radio fund.

If you're putting up an 80 foot antenna, I'd expect you'll want a table
top before long anyway.

You can always expand the antenna when you have a radio that's better
equipped to handle it.

Mark S. Holden wrote:

Bob wrote:

Hello, I rescently baught a 7600GR. I'm planning on putting up 80 to
90 foot longwire/random wire between my house and a large tree.

Any input on the following tuners? I'm a newbie with this kinda stuff.

http://www.mfjenterprises.com/produc...rodid=MFJ-1046

-and-

http://www.mfjenterprises.com/produc...odid=MFJ-1045C

Several have suggested a passive one. The list cost on these seems
rather high, are there cheaper tuner/preselector options without
giving up quality/usefullness?

Secondly, would a low pass filter still be useful with a tuner?

Thanks,
Bob


Of the two, I'd go for the passive one. You certainly won't need gain
with that setup.

If the preselector alone isn't enough, you might look to add a variable
attenuator to prevent overloading. You can make one of these dirt cheap.

The sony 7600GR has one built in, with a dial on the side to adjust it.

I'm hoping that and the preselector does the job.
If not, I'll use more nylon rope and shorten the antenna.


But actually, I'd consider going with a much smaller antenna, away from
the house with an impedance matching transformer, and use the savings to
start a table top radio fund.

If you're putting up an 80 foot antenna, I'd expect you'll want a table
top before long anyway.

You can always expand the antenna when you have a radio that's better
equipped to handle it.


Thanks for the input.

-Bob

"Mark S. Holden" wrote in message
...
Bob wrote:

Hello, I rescently baught a 7600GR. I'm planning on putting up 80 to 90
foot longwire/random wire between my house and a large tree.

Any input on the following tuners? I'm a newbie with this kinda stuff.

http://www.mfjenterprises.com/produc...rodid=MFJ-1046

-and-

http://www.mfjenterprises.com/produc...odid=MFJ-1045C

Several have suggested a passive one. The list cost on these seems
rather high, are there cheaper tuner/preselector options without giving
up quality/usefullness?

Secondly, would a low pass filter still be useful with a tuner?

Thanks,
Bob

Of the two, I'd go for the passive one. You certainly won't need gain
with that setup.

If the preselector alone isn't enough, you might look to add a variable
attenuator to prevent overloading. You can make one of these dirt cheap.

But actually, I'd consider going with a much smaller antenna, away from
the house with an impedance matching transformer, and use the savings to
start a table top radio fund.


Excellent advice Mark,
Far more advantage can be gained by using a matching UNUN and proper shield
grounding- otherwise noise from the house is conducted right out to the
antenna. A lot cheaper and less knobs to fool with too.

"Dale Parfitt" wrote in message
news:0hJWc.6989$%11.3590@trnddc02...

"Mark S. Holden" wrote in message
...
Bob wrote:

Hello, I rescently baught a 7600GR. I'm planning on putting up 80 to
90
foot longwire/random wire between my house and a large tree.

Any input on the following tuners? I'm a newbie with this kinda stuff.

http://www.mfjenterprises.com/produc...rodid=MFJ-1046

-and-

http://www.mfjenterprises.com/produc...odid=MFJ-1045C

Several have suggested a passive one. The list cost on these seems
rather high, are there cheaper tuner/preselector options without
giving
up quality/usefullness?

Secondly, would a low pass filter still be useful with a tuner?

Thanks,
Bob

Of the two, I'd go for the passive one. You certainly won't need gain
with that setup.

If the preselector alone isn't enough, you might look to add a variable
attenuator to prevent overloading. You can make one of these dirt
cheap.

But actually, I'd consider going with a much smaller antenna, away from
the house with an impedance matching transformer, and use the savings to
start a table top radio fund.


Excellent advice Mark,
Far more advantage can be gained by using a matching UNUN and proper
shield
grounding- otherwise noise from the house is conducted right out to the
antenna. A lot cheaper and less knobs to fool with too.




noob

I have been lurking for a while but I need to ask a question he


I am new SW listening (actually, I am recently returned to the hobby). I am
not an expert. I see this thread talking about how to build (various styles)
of antenna, but no schematics. I think that I understand the concepts but an
actual drawing would be helpful. A generic parts list would be even better.
I do tend to overload my little portable with a 20 foot longwire so anything
to improve/refine the reception would be a huge help.

Thanks

Eric
/noob

"Eric R.Ortega" wrote:
noob

I have been lurking for a while but I need to ask a question he

I am new SW listening (actually, I am recently returned to the hobby). I am
not an expert. I see this thread talking about how to build (various styles)
of antenna, but no schematics. I think that I understand the concepts but an
actual drawing would be helpful. A generic parts list would be even better.
I do tend to overload my little portable with a 20 foot longwire so anything
to improve/refine the reception would be a huge help.

Thanks

Eric
/noob

Hi

Here's a link with some helpful information:

http://www.hard-core-dx.com/nordicdx/antenna/feed/

For a random wire antenna, you'd want something in the range of a 9:1 impedance matching transformer or unun.

Otherwise, feel free to ask questions, there are plenty of folks here who are happy to help.

Regards,

Mark

Mark S. Holden wrote:

"Eric R.Ortega" wrote:

noob

I have been lurking for a while but I need to ask a question he

I am new SW listening (actually, I am recently returned to the hobby). I am
not an expert. I see this thread talking about how to build (various styles)
of antenna, but no schematics. I think that I understand the concepts but an
actual drawing would be helpful. A generic parts list would be even better.
I do tend to overload my little portable with a 20 foot longwire so anything
to improve/refine the reception would be a huge help.

Thanks

Eric
/noob


Hi

Here's a link with some helpful information:

http://www.hard-core-dx.com/nordicdx/antenna/feed/

For a random wire antenna, you'd want something in the range of a 9:1 impedance matching transformer or unun.

Otherwise, feel free to ask questions, there are plenty of folks here who are happy to help.

Regards,

Mark

Thanks a lot

Mark S. Holden wrote:
I doubt you'll need a preselector when you get a table top.

Depends. Some older units could benefit. I'm sure my FRG-7 would see a
tad bit of improvement. I *know* my NC-100 would perk up. :)

--
If Kerry can't cope with the "Republican Attack Machine",
how can he hope to deal with Al Qaeda?

clifto wrote:
Mark S. Holden wrote:

I doubt you'll need a preselector when you get a table top.


Depends. Some older units could benefit. I'm sure my FRG-7 would see a
tad bit of improvement. I *know* my NC-100 would perk up. :)


I was thinking more modern radios, and for that matter, probably ones
that are better than average.

www.kc7nod.20m.com


"Eric R.Ortega" wrote in message
news:JuKWc.100824$Lj.17349@fed1read03...

"Dale Parfitt" wrote in message
news:0hJWc.6989$%11.3590@trnddc02...

"Mark S. Holden" wrote in message
...
Bob wrote:

Hello, I rescently baught a 7600GR. I'm planning on putting up 80 to
90
foot longwire/random wire between my house and a large tree.

Any input on the following tuners? I'm a newbie with this kinda
stuff.

http://www.mfjenterprises.com/produc...rodid=MFJ-1046

-and-

http://www.mfjenterprises.com/produc...odid=MFJ-1045C

Several have suggested a passive one. The list cost on these seems
rather high, are there cheaper tuner/preselector options without
giving
up quality/usefullness?

Secondly, would a low pass filter still be useful with a tuner?

Thanks,
Bob

Of the two, I'd go for the passive one. You certainly won't need gain
with that setup.

If the preselector alone isn't enough, you might look to add a
variable
attenuator to prevent overloading. You can make one of these dirt
cheap.

But actually, I'd consider going with a much smaller antenna, away
from
the house with an impedance matching transformer, and use the savings
to
start a table top radio fund.


Excellent advice Mark,
Far more advantage can be gained by using a matching UNUN and proper
shield
grounding- otherwise noise from the house is conducted right out to the
antenna. A lot cheaper and less knobs to fool with too.




noob

I have been lurking for a while but I need to ask a question he


I am new SW listening (actually, I am recently returned to the hobby). I a
m
not an expert. I see this thread talking about how to build (various
styles)
of antenna, but no schematics. I think that I understand the concepts but
an
actual drawing would be helpful. A generic parts list would be even
better.
I do tend to overload my little portable with a 20 foot longwire so
anything
to improve/refine the reception would be a huge help.

Thanks

Eric
/noob