Hahaha sounds good. I will go with that...

Thanks. 73's. 


 
 
Darren Duff.

amateur radio station KK4AHX.

 

Cherokee Amateur Radio Society.

http://cherokeehams.com


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of colin McDonald
Sent: Saturday, March 19, 2011 9:55 PM
To: [log in to unmask]
Subject: Re: Ht burning out?

don't get long winded and everything will be just fine.
also, the two units that were mentioned are very old radios...not sure if
the article was written a long long time ago when these radios were new, or
if this author just chooses to use boat anchor HT's...either way, I wouldn't
worry too much about it, unless your going to be talking for long long
periods of time and over an extended period.
most modern HT's have a bigger heat sink and obviously better transistors
than older stuff did.
while the 202 might have been a good radio for it's time, it was a shadow
compared to modern HT's...same holds true for the th22a.

If this guy blew a final section in a year, he must have been yapping like
an old fart on 75 meters or something.
73
Colin, V A6BKX
----- Original Message -----
From: "KK4AHX Darren Duff" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, March 19, 2011 7:03 PM
Subject: Ht burning out?


> Hi.
> After reading the below paragraph in an online article I am worried 
> about burning out my ht. It's the only rig I have now. I want to get a 
> mobile to use as a base station but it's not in the budget right now. 
> I would like to know what other's think. here is the snip from the 
> article.
>
> HAND HELD DUTY CYCLE LIMITS
>
> If you subject today's HTs to frequent full power, 5w transmissions of 
> several minutes duration they overheat and the final power transistors 
> may fail prematurely. Kenwood and Yaesu state in their service manuals 
> that their HTs are rated for 20% duty cycle at their maximum RF 
> output, or 30 seconds of transmit to 2 minutes of standby. After I 
> first got my license, I burned up three sets of "finals" in less than 
> a year with long winded QSOs using a Radio Shack HTX-202 which 
> produced 8w when powered at 13.8V from my auto cigarette lighter plug! 
> When the warranty ran out, I replaced it with a Kenwood TH-22 and 
> repeated the same result. Kenwood's Virginia Beach service center 
> politely admonished me that I was "exceeding the recommended duty 
> cycle" and should buy a mobile. I followed their advice and am 
> satisfied with my two Kenwood mobiles, but I sought out other HTs and pass
that advice along.
>
> Thanks, 73's.
>
> Darren Duff.
>
> amateur radio station KK4AHX.
>
> 
 

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