MA5B Newby's misunderstand of Beams?
 

Please e-mail me directly if you think you know what my problem is and
how to resolve it. I have just installed an MA5B Cushcraft Mini-Beam
and all seems fine. SWR's are normal, Coils are installed
correctly...all is well except a major noise increase that rides along
with the signal received. Like hearing a weak station and switching on
a receive amplifier (Bringing noise with the signal) I believe in my
heart I have constructed the Beam IAW the Cushcraft manual. Coax is
new and connection are correct. Could this noise be because of the
matching network being bad. I switch over to my Dipole on the ground
and the signal changes from static voice to clear audio right down to
absoloutly no noise when transmitter un-keys. Very frustrating. Help
and hilfe bitte!
Mike KB3IUL

MA5B Newby's misunderstand of Beams?
 

"mike" wrote in message
oups.com...
Please e-mail me directly if you think you know what my problem is and
how to resolve it. I have just installed an MA5B Cushcraft Mini-Beam
and all seems fine. SWR's are normal, Coils are installed
correctly...all is well except a major noise increase that rides along
with the signal received. Like hearing a weak station and switching on
a receive amplifier (Bringing noise with the signal) I believe in my
heart I have constructed the Beam IAW the Cushcraft manual. Coax is
new and connection are correct. Could this noise be because of the
matching network being bad. I switch over to my Dipole on the ground
and the signal changes from static voice to clear audio right down to
absoloutly no noise when transmitter un-keys. Very frustrating. Help
and hilfe bitte!
Mike KB3IUL

May be a loose connection somewhere.
Just to find out - hose it with a water hose and see if any change occurs to
the good.
If the noise is reduced from a good soaking, then one of your connections
may benefit from from some penetrox where aluminum - to - aluminum joints
exists. A good rub with emery-cloth then the the penetrox / no-alox
(purchase in the electrical section at Lowes or Home Depot.

MA5B Newby's misunderstand of Beams?
 

Your dipole is close to ground?
It is normal that antenna close to ground is almost without noise.
That's why people use vertical antenna for TX and low beverage antenna for
RX.
Did You try your beam on TX?
Maybe You are living in urban area where the noise is common.
Try using some quiet antenna like vertical delta loop or quad.
You can use separate antenna for TX and RX.
I have 1 ele quad (vertical loop) for 40m and it is pretty quiet comparing
to vertical or dipole.
73 Neno 9A4MN

"mike" wrote in message
oups.com...
Please e-mail me directly if you think you know what my problem is and
how to resolve it. I have just installed an MA5B Cushcraft Mini-Beam
and all seems fine. SWR's are normal, Coils are installed
correctly...all is well except a major noise increase that rides along
with the signal received. Like hearing a weak station and switching on
a receive amplifier (Bringing noise with the signal) I believe in my
heart I have constructed the Beam IAW the Cushcraft manual. Coax is
new and connection are correct. Could this noise be because of the
matching network being bad. I switch over to my Dipole on the ground
and the signal changes from static voice to clear audio right down to
absoloutly no noise when transmitter un-keys. Very frustrating. Help
and hilfe bitte!
Mike KB3IUL