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.
>>
>>
>>
>