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Weak reception
3/23/2011 6:15:28 PMYen Lim
I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
3/23/2011 10:36:27 PMNorm Leal
Hi Yen

Can you put a wire under a window that opens?

A signal booster only works when there are decent signals. It will boost noise along with the signal.

Norm

:I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
:

3/24/2011 12:42:49 AMYen

Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.

Yen

:Hi Yen
:
: Can you put a wire under a window that opens?
:
: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:
:Norm
:
::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::
:
:

3/24/2011 12:22:07 PMThomas Dermody
Short wave bands vary greatly in strength depending on the time of day. If this radio performs differently than another radio on the same band, I would suspect that it either needs an alignment on the short wave (short wave circuits are very critical to alignment), or it needs a larger antenna. If the radio performs the same as another radio on the same band, you might consider operating it at a time of the day when reception is stronger, or equip both radios with longer antennas. I don't see why a thin wire or strap couldn't be slipped under the window.
3/24/2011 8:27:21 PMYen
Hi Thomas,

I guess a little tree climbing may be good for me, physically. As for tuning I followed the manufacturer's instructions the best I could before coming to this forum. I have only one radio with shortwave reception. If given a choice and being a vintage "nut" I would want to try a signal booster if given a choice. I mean build one.

Yen

:Short wave bands vary greatly in strength depending on the time of day. If this radio performs differently than another radio on the same band, I would suspect that it either needs an alignment on the short wave (short wave circuits are very critical to alignment), or it needs a larger antenna. If the radio performs the same as another radio on the same band, you might consider operating it at a time of the day when reception is stronger, or equip both radios with longer antennas. I don't see why a thin wire or strap couldn't be slipped under the window.
:

3/24/2011 12:26:11 PMNorm Leal
The window frame may make a decent antenna?

Norm

:
:Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
:
:Yen
:
::Hi Yen
::
:: Can you put a wire under a window that opens?
::
:: A signal booster only works when there are decent signals. It will boost noise along with the signal.
::
::Norm
::
:::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
:::
::
::
:
:

3/24/2011 12:38:39 PMLewis L
:The window frame may make a decent antenna?
:
:Norm
:
::
::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
::
::Yen
::
:::Hi Yen
:::
::: Can you put a wire under a window that opens?
:::
::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:::
:::Norm
:::
::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::::
:::


I have used a foot or so of 300 Ohm television twin lead under the window and screen, it is nice and flat and you can close the window and screen completely, nice if you have to hang an antenna out the window, or run it from window to window. If the neighbors don't see it, they won't complain about it.
Lewis

3/24/2011 8:48:30 PMYen
Good idea Lewis. I am thinking of attaching a speaker wire to the top of my fruit tree. Neighbour objection has not come to mind but if they do then perhaps I shall have to deal with the isue separately.

Yen

::The window frame may make a decent antenna?
::
::Norm
::
:::
:::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
:::
:::Yen
:::
::::Hi Yen
::::
:::: Can you put a wire under a window that opens?
::::
:::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
::::
::::Norm
::::
:::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
:::::
::::
:
:
:
:
:I have used a foot or so of 300 Ohm television twin lead under the window and screen, it is nice and flat and you can close the window and screen completely, nice if you have to hang an antenna out the window, or run it from window to window. If the neighbors don't see it, they won't complain about it.
:Lewis
:

3/25/2011 10:10:39 AMLewis L
:Good idea Lewis. I am thinking of attaching a speaker wire to the top of my fruit tree. Neighbour objection has not come to mind but if they do then perhaps I shall have to deal with the isue separately.
:
:Yen

I used the 300w twin lead to an antenna of #20 ga. wire strung from my house to a tree in the front yard. It is invisible from the street. The first station I got after recapping my Hallicrafters SX 77 was from Peking, Red China. My wife was impressed.
Lewis
:
:
:
:::The window frame may make a decent antenna?
:::
:::Norm
:::
::::
::::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
::::
::::Yen
::::
:::::Hi Yen
:::::
::::: Can you put a wire under a window that opens?
:::::
::::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:::::
:::::Norm
:::::
::::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::::::
:::::
::
::
::
::
::I have used a foot or so of 300 Ohm television twin lead under the window and screen, it is nice and flat and you can close the window and screen completely, nice if you have to hang an antenna out the window, or run it from window to window. If the neighbors don't see it, they won't complain about it.
::Lewis
::
:
:

3/24/2011 8:34:31 PMYen
Hi Norm,

Using the aluminium window frame seemed a good idea but there is no improvement. When this horrible weather improves I shall string a wire up my fruit tree. Some physical exertion required but it will be OK. I would still like to "tinkle" with a home built signal booster if I have the choice.

Yen

The window frame may make a decent antenna?
:
:Norm
:
::
::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
::
::Yen
::
:::Hi Yen
:::
::: Can you put a wire under a window that opens?
:::
::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:::
:::Norm
:::
::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::::
:::
:::
::
::
:
:

3/24/2011 9:12:15 PMsteve
:Hi Norm
:Using the aluminium window frame seemed a good idea but there is no improvement. When this horrible weather improves I shall string a wire up my fruit tree. Some physical exertion required but it will be OK. I would still like to "tinkle" with a home built signal booster if I have the choice.
:
:Yen
:
:The window frame may make a decent antenna?
::
::Norm
::
:::
:::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
:::
:::Yen
:::
::::Hi Yen
::::
:::: Can you put a wire under a window that opens?
::::
:::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
::::
::::Norm
::::
:::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
:::::
::::
::::
:::
:::
::
::
:
:


Try one or two turns around the window or someplace
about that size , and put a 365 var cap across that
loop and feed the loop ends into the receiver .
Two terminal ant on the receiver or ground one side to the chassis and the other to the antenna input .
You should be able to pick up something . Also this time of year , signals here, ( MN ) are much better
after supper time .

3/25/2011 11:28:57 PMYen
::Hi Norm
::Using the aluminium window frame seemed a good idea but there is no improvement. When this horrible weather improves I shall string a wire up my fruit tree. Some physical exertion required but it will be OK. I would still like to "tinkle" with a home built signal booster if I have the choice.
::
::Yen
::
::The window frame may make a decent antenna?
:::
:::Norm
:::
::::
::::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
::::
::::Yen
::::
:::::Hi Yen
:::::
::::: Can you put a wire under a window that opens?
:::::
::::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:::::
:::::Norm
:::::
::::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
Interesting Steve. But what is a 365 var cap? It may be a common term but I rearly do not know. Please help.

Yen

:Try one or two turns around the window or someplace
:about that size , and put a 365 var cap across that
:loop and feed the loop ends into the receiver .
:Two terminal ant on the receiver or ground one side to the chassis and the other to the antenna input .
:You should be able to pick up something . Also this time of year , signals here, ( MN ) are much better
:after supper time .
:

3/25/2011 11:44:03 PMRich, W3HWJ
Part of the problem may be shortwave propagation conditions.
--You won't hear much on the bands below 5 MHz until night time.
--You won't hear much on the bands above 15 MHz unless sunspot conditions are good, which they have not been.

I use WWV as a "beacon" you should hear the time signals at 5 MHz. in the evening and at 10 MHz pretty much any time of day. 15 MHz usually comes in during the day only. 20 MHz hasn't been good for the last 6 years!

Rich


:::Hi Norm
:::Using the aluminium window frame seemed a good idea but there is no improvement. When this horrible weather improves I shall string a wire up my fruit tree. Some physical exertion required but it will be OK. I would still like to "tinkle" with a home built signal booster if I have the choice.
:::
:::Yen
:::
:::The window frame may make a decent antenna?
::::
::::Norm
::::
:::::
:::::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
:::::
:::::Yen
:::::
::::::Hi Yen
::::::
:::::: Can you put a wire under a window that opens?
::::::
:::::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
::::::
::::::Norm
::::::
:::::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
:::::::
::::::
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:Interesting Steve. But what is a 365 var cap? It may be a common term but I rearly do not know. Please help.
:
:Yen
:
::Try one or two turns around the window or someplace
::about that size , and put a 365 var cap across that
::loop and feed the loop ends into the receiver .
::Two terminal ant on the receiver or ground one side to the chassis and the other to the antenna input .
::You should be able to pick up something . Also this time of year , signals here, ( MN ) are much better
::after supper time .
::
:
:

3/26/2011 1:14:37 PMYen
Great Rich. Will bear your advice in mind and try it out. Thank you. Yen

:Part of the problem may be shortwave propagation conditions.
:--You won't hear much on the bands below 5 MHz until night time.
:--You won't hear much on the bands above 15 MHz unless sunspot conditions are good, which they have not been.
:
:I use WWV as a "beacon" you should hear the time signals at 5 MHz. in the evening and at 10 MHz pretty much any time of day. 15 MHz usually comes in during the day only. 20 MHz hasn't been good for the last 6 years!
:
:Rich
:
:
::::Hi Norm
::::Using the aluminium window frame seemed a good idea but there is no improvement. When this horrible weather improves I shall string a wire up my fruit tree. Some physical exertion required but it will be OK. I would still like to "tinkle" with a home built signal booster if I have the choice.
::::
::::Yen
::::
::::The window frame may make a decent antenna?
:::::
:::::Norm
:::::
::::::
::::::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
::::::
::::::Yen
::::::
:::::::Hi Yen
:::::::
::::::: Can you put a wire under a window that opens?
:::::::
::::::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:::::::
:::::::Norm
:::::::
::::::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::::::::
:::::::
:::::::
::::::
::::::
:::::
:::::
::::
::::
:::
:::
::Interesting Steve. But what is a 365 var cap? It may be a common term but I rearly do not know. Please help.
::
::Yen
::
:::Try one or two turns around the window or someplace
:::about that size , and put a 365 var cap across that
:::loop and feed the loop ends into the receiver .
:::Two terminal ant on the receiver or ground one side to the chassis and the other to the antenna input .
:::You should be able to pick up something . Also this time of year , signals here, ( MN ) are much better
:::after supper time .
:::
::
::
:
:

3/26/2011 12:33:44 AMMarv Nuce
Norm,
I second that motion.

marv

:The window frame may make a decent antenna?
:
:Norm
:
::
::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
::
::Yen
::
:::Hi Yen
:::
::: Can you put a wire under a window that opens?
:::
::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
:::
:::Norm
:::
::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
::::
:::
:::
::
::
:
:

3/26/2011 1:16:49 PMYen
Thanks Marv. Any help is welcome.

Yen

:Norm,
:I second that motion.
:
:marv
:
::The window frame may make a decent antenna?
::
::Norm
::
:::
:::Thanks Norm. There is a mosquito net outside the window. The window itself slides into a vertical slot in the window frame with little clearance. In winter heat loss may be a problem if the window is not fully shut. If nothing else comes up I shall have to investigate your idea. It is an aluminium framed window. 4ft X 5ft. Thank you again.
:::
:::Yen
:::
::::Hi Yen
::::
:::: Can you put a wire under a window that opens?
::::
:::: A signal booster only works when there are decent signals. It will boost noise along with the signal.
::::
::::Norm
::::
:::::I have an AM/shortwave Model 36 Kadette radio. Good reception on AM band but very weak on Shortwave. My work room is 10ft X 12ft X 8ft high and lengthening the aerial wire in any form within that space has not helped. An external aerial will require drilling a hole in the wall for which I am not permitted. My next thought is to build a shortwave signal booster suitable for indoor use. Can someone help me locate a simple schematic for this purpose?
:::::
::::
::::
:::
:::
::
::
:
:

3/26/2011 3:24:09 PMWarren
One thing that works well for an antenna is to use your land line telephone cord. Make it into several turns forming a coil. Wrap another wire around the coil making a loose coupling. Connect one end of that wire to your radio. Makes for a static free reception normally.
3/26/2011 7:31:42 PMYen
Thanks Warren. I shall try.

Yen

:One thing that works well for an antenna is to use your land line telephone cord. Make it into several turns forming a coil. Wrap another wire around the coil making a loose coupling. Connect one end of that wire to your radio. Makes for a static free reception normally.
:

3/27/2011 4:25:09 PMYen - Thank you
Many thsnks to Norm Leal, Thomas Dermody, Lewis L, Steve, Rich W3HWJ, Marv Nuce and Warrem. I learned a great deal from you inputs.

Yen

:Thanks Warren. I shall try.
:
:Yen
:
::One thing that works well for an antenna is to use your land line telephone cord. Make it into several turns forming a coil. Wrap another wire around the coil making a loose coupling. Connect one end of that wire to your radio. Makes for a static free reception normally.
::
:
:



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