Lol! 


 
 
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: Sunday, March 20, 2011 1:27 AM
To: [log in to unmask]
Subject: Re: Ht burning out?

oh boy, if he ran an amp, and was long winded, he'd be prime material for
75M and the old buzzards club!
73
Colin, V A6BKX
----- Original Message -----
From: "Steve Dresser" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, March 19, 2011 8:35 PM
Subject: Re: Ht burning out?


> Darren,
>
> You'll have to evaluate your operating style to determine whether or 
> not you need to be concerned.  If you tend to make "old buzzard" 
> transmissions, you'll either have to become less long-winded or get a 
> mobile.  Another alternative is to run your HT at low power into an 
> amplifier.
>
> Steve
>
> ----- Original Message -----
> From: "KK4AHX Darren Duff" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, March 19, 2011 21:03
> 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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