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Author Topic: MORE OUTPUT POWER ON KENWOOD TS-450S  (Read 2097 times)
MW3HWM
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Posts: 11




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« on: May 09, 2009, 02:56:37 AM »

Hi,
just wondering if anyone knows which pot turns up the output power on a ts-450s.

My sons 450s was turned up to get 150w out, and is still going strong.
Unfortunately the guy who did this isnt around any more,
so I would like to know which pot increases the output.

Note my callsign on here shows my registered MW3 call but I am now an MW0 so I can legally use the full power of 400w
Anyone ??.
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W3LK
Member

Posts: 5644




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« Reply #1 on: May 09, 2009, 07:10:23 AM »

<< just wondering if anyone knows which pot turns up the output power on a ts-450s.

My sons 450s was turned up to get 150w out, and is still going strong.
Unfortunately the guy who did this isnt around any more,
so I would like to know which pot increases the output. >>

How long has it "still been going strong"? The increase in power represents about 1.5dB increase and the difference will never be heard in any real life situation, but will probably cut the life of the finals considerably, especially if he does any 100 percent duty cycle modes.

It would also be interesting to see the output of his radio on a scope. Increasing the output like that generally wreaks havoc with the spectral purity of the signal.

73,

Lon - W3LK
Naugatuck, Connecticut
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A smoking section in a restaurant makes as much sense as a peeing section in a swimming pool.
K0BT
Member

Posts: 176




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« Reply #2 on: May 09, 2009, 02:58:39 PM »

There is a list of good reasons to not do this.

The guy on the other end can't tell the difference.
You might become well known for your bad signal.
It can eventually kill your finals.
It can defeat SWR protection.
... and so on.

All of these are true, but for a lot of people, those suggestions have to compete with the satisfaction of seeing the watt meter neede rise.  

Here's an experiment.  Hook up both rigs side by side, make a contact, then switch the antenna.  Ask the person on the other end to tell you the difference in signal strength.  Or, make a contact with someone (a friendly net is nice) and gradually decrease your output power.  Ask the other stations where they start to notice a meaningful difference.  It's a fun exercise.  It convinced me to leave power adjustments alone.

73,
Bob



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MW3HWM
Member

Posts: 11




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« Reply #3 on: May 16, 2009, 02:46:58 PM »

Thanks guys,
I will accept your reasons for not doing this.

Its a shame though,as my son always has the better report
we both have the same antennas, and rigs.
And we live 16 miles apart.

He has used his rig tweaked up for about 10 years
hence the "still going strong" comment.

Never mind though...

Regards,
73
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KE4DRN
Member

Posts: 3714




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« Reply #4 on: May 18, 2009, 06:46:58 PM »

hi David,

perhaps you rig is out of spec ?

there could have been a design change unless
both radios are close in serial number.

are you using the same mic and coax type ?

73 james
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KA5IPF
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Posts: 979


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« Reply #5 on: May 19, 2009, 07:32:26 AM »

The only way to compare the two radios is at the same location using exactly the same antenna, etc.

Is your antenna identical to your son's? Exactly the same height? Exactly the same orientation? Same feedline? Both at the same elevation? Same terrain around them? Same ground reflectivty? ETC ETC.

See the problem now?

Clif
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KE4MOB
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Posts: 721


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« Reply #6 on: May 21, 2009, 10:49:10 AM »

All you do is turn up the ALC adjustment pot internally.

And no, it's not recommended unless you can get rid of the extra heat.  And even then, as others have posted, it's not worth it.
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WA9FVP
Member

Posts: 37




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« Reply #7 on: May 23, 2009, 06:17:16 PM »

Hey guys!  Before turning up the power, read my article "Over Clocking Your Ham Rig" in the May
issue (page 56) of QST.  
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