[Lowfer] Bypassing the BCB attenuator in the Kenwood TS450S ( Thanks Jordan )

[KU4XR]

--- Jordan <outposter30 at shaw.ca> wrote:
 So far, My TS-450S comes out a little ahead below 500 khz, but 
> especially below 100khz...!   73...Jordan....
> 

Hello again all:
I want to share some of my real world experience, hopefully it will be of general use.
I have greatly enhanced my reception in different portions of the LW spectrum by using
coils in line with the antenna, ( small coils inside the shack ). I am using a 160 meter windom,
and an 80 meter dipole, simultaneously fed with one coax. ( I short the center pin and shield ) it
acts as a single line feeder. About 77uH helps in the 600 meter range. around 1.20mH helps at 1750
meters, about 1.80mH at 2200 meters down to about 70KHz, while using an air variable cap to
resonate the antenna. I have found that about 2.4mH works good for me at 30 to 60KHz. A great
source for the coils is EMI isolation transformers in computer power supplies, dvd/vcr's , tv's,
etc. Some measure from a few uH; to a couple of mH. In my experience; the colis need to have a DC
resistance of from <1, to no more than 15 Ohms. Above that and signal attenuation starts to occur.
I also have an assortment of fixed value caps connected to ground, and use clip leads to choose
the value that peaks the recieve. Works pretty good for me here.
Hope this info can be useful to someone.  7e to all, Andy - KU4XR



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