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26fb010 Profile
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Accomplished DX-er

Registered: 01-2009
Location: BLACK COUNTRY
Posts: 574
Karma: 3 (+3/-0)
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Re: hope this does what it says on the tin


i am jealous of that PSU.
7/Feb/2009, 8:14 am Link to this post Send Email to 26fb010   Send PM to 26fb010
 
Hot Fusion Profile
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Management

Registered: 03-2008
Location: South West England
Posts: 1389
Karma: 7 (+7/-0)
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Re: hope this does what it says on the tin


Yes - sounds a bit meaty, doesn't it? Got to be a switch mode job.

Shall we pay him a visit and stroll off with it??

---
Andy - 26FB107
7/Feb/2009, 5:57 pm Link to this post Send Email to Hot Fusion   Send PM to Hot Fusion
 
26GB82 Profile
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Registered: 02-2009
Posts: 31
Karma: 1 (+1/-0)
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posticon Re: hope this does what it says on the tin


Well my B550P didn't actually give me any increase on received signal when talking to Simon FB204 from the mobile on Friday afternoon so I'm a bit disappointed but in reality as I posted earlier in the thread with the 300P I don't have to rune the engine constantly meaning eco friendliness and more importantly no self generated QRM.

Sorry Paddy this doesn't mean you can have it as you have two batteries, my deep cycle Exide Maxxima will feed it engine off for a reasonable time too and all that power wasting heat from it will keep the car interior warm....good luck with the move mate,Dave.
8/Feb/2009, 1:05 am Link to this post Send Email to 26GB82   Send PM to 26GB82
 
topbuzzuk Profile
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Big Cheese

Registered: 11-2007
Location: Wiltshire, UK
Posts: 2655
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Re: hope this does what it says on the tin


thanks Dave for the wishes on the move, not that i cant have the 550 emoticon to be honest i am happy with the 300, it does what i want it too. I spoke to australia on 100watts before so anything over is a bonus but not needed emoticon

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26FB118
8/Feb/2009, 1:19 am Link to this post Send Email to topbuzzuk   Send PM to topbuzzuk Yahoo
 
John193 Profile
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Freebander

Registered: 11-2008
Location: South Glos
Posts: 260
Karma: 3 (+3/-0)
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Re: hope this does what it says on the tin


Are we talking TRANSMITTED ENERGY in watts here or DISSIPATION in watts, there's a million miles betwwen them. A 4-1000 valve for eg will only dissipate its rated 1000 watts of HEAT in constant use but will transmit 4000 watts of rf in short duration ssb and i personally know they'll do 5.5kw in ppb burst only mode. Most tran amps are optimistic on sales pitch and dissapointing on peak anything.
Also in class ab amplification you are not amplifying all the signal "only the big spiky bits" yes?. A mrf455 will carry 250 watts plus but it cant do it constantly because it can only DISSIPATE 55w so for voice coms its ok to drive it harder than 55w because a human voice on ssb is made up of a low average signal(less than 35% of max). Help? or not really. Thats the short answer anyway.
John193 emoticon
9/Apr/2009, 11:57 pm Link to this post Send Email to John193   Send PM to John193 MSN
 


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