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HIGH GAIN ¾ Antenna Problems
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HIGH GAIN ¾ Antenna Problems
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pcs
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Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
How a signal sounds has very little to do with an antenna.

In fact it only has to do with range/signal coverage.

It might have some effect on actual audio on AM MW band, where
a narrowband antenna makes a difference, if not tuned properly.

Contact me via email, I'll get you in touch with the manufacturer.

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Marko - PCS Electronics
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Turn your PC into a FM radio station!
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fax +386 4 2316 128
Wed Mar 30, 2005 5:02 pm View user's profile Send private message Visit poster's website
rexb
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Joined: 26 Jun 2005
Posts: 13
Location: UT USA

Post Reply with quote
Maybe it's just me, but it sounds like you own a lemon.

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Yoda Shaman
Mon Jul 04, 2005 9:59 am View user's profile Send private message
deeplist
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Joined: 29 Mar 2005
Posts: 20
Location: Indiana
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Post Reply with quote
You should not have even posted here. This thread is 3 months old. I have since then solved the problem.

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Charles E. Decker IV
http://deeplist.com
admin@deeplist.com
Mon Jul 04, 2005 4:36 pm View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger ICQ Number
Norwalk Electronics
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Joined: 01 May 2006
Posts: 7
Location: Connecticut USA

Post It's the amplifier, not the antenna! Reply with quote
It should be noted that upon further investigation it was found that this customers 300 watt power amplifier was only mounted on the small aluminum heat spreader supplied with the board and not properly mounted on a suitable heat sink. This combined with tampering of R2 (the bias setting) almost certainly caused the amplifier to overheat and operate erratically after a few minutes. It takes basic electronics skills to assemble a working station and burning yourself with RF while adjusting the antenna is not a good sign. An antenna rated at over three times the power of your transmitter would not be in any way responsible for causing distortion or reducing power over time. The High Gain 3/4 wave is guaranteed to outperform every single other antenna on the market for FM transmission.
Mon May 01, 2006 7:54 am View user's profile Send private message Visit poster's website
stylzmovement
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Joined: 11 Oct 2003
Posts: 142

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Post Re: It's the amplifier, not the antenna! Reply with quote
Norwalk Electronics wrote:
It should be noted that upon further investigation it was found that this customers 300 watt power amplifier was only mounted on the small aluminum heat spreader supplied with the board and not properly mounted on a suitable heat sink. This combined with tampering of R2 (the bias setting) almost certainly caused the amplifier to overheat and operate erratically after a few minutes. It takes basic electronics skills to assemble a working station and burning yourself with RF while adjusting the antenna is not a good sign. An antenna rated at over three times the power of your transmitter would not be in any way responsible for causing distortion or reducing power over time. The High Gain 3/4 wave is guaranteed to outperform every single other antenna on the market for FM transmission.


i also read all the post of this user , i think the problem i with the cooling of the amp , you will need to have a good heatsink and 1 or maybe 2 fans blowing fresh cool air over it , or else you will start at 300watts and over time fall to 150 watts or maybe lower , the 3/4 wave antenna is well made and is also well package , i have installed several. i have very little problem with them.
Thu May 04, 2006 10:18 am View user's profile Send private message
pcs
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Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Re: It's the amplifier, not the antenna! Reply with quote
Quote:
i also read all the post of this user , i think the problem i with the cooling of the amp , you will need to have a good heatsink and 1 or maybe 2 fans blowing fresh cool air over it , or else you will start at 300watts and over time fall to 150 watts or maybe lower , the 3/4 wave antenna is well made and is also well package , i have installed several. i have very little problem with them.


You will have a smoking pile of electronic garbage, if you do not use heatsink. Moreover, the final might
give away its soul in a spectacular manner. Quite expensive fire cracker.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Thu May 04, 2006 11:57 am View user's profile Send private message Visit poster's website
n9aok
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Joined: 03 Jun 2006
Posts: 4

Post Re: It's the amplifier, not the antenna! Reply with quote
Thanks for the followup on this problem as I was reading it and really wanted to know the end to the story.
Looks like the OP knew it was a heat problem of some type. Glad to see this resolved with real root cause found.


Norwalk Electronics wrote:
It should be noted that upon further investigation it was found that this customers 300 watt power amplifier was only mounted on the small aluminum heat spreader supplied with the board and not properly mounted on a suitable heat sink. This combined with tampering of R2 (the bias setting) almost certainly caused the amplifier to overheat and operate erratically after a few minutes. It takes basic electronics skills to assemble a working station and burning yourself with RF while adjusting the antenna is not a good sign. An antenna rated at over three times the power of your transmitter would not be in any way responsible for causing distortion or reducing power over time. The High Gain 3/4 wave is guaranteed to outperform every single other antenna on the market for FM transmission.

Sat Jun 03, 2006 2:43 pm View user's profile Send private message MSN Messenger
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