[Amps] Warm up and on time question...

[Carl]

Its too bad amps dont have a B+ On-Off switch such as the old NCL-2000 
offered....saves a lot of unecessary hours on PS components. Leave just the 
filaments on.

Carl
KM1H

----- Original Message ----- 
From: "Charles Harpole" <k4vud at hotmail.com>
To: <dave at nk7z.net>; <amps at contesting.com>
Sent: Tuesday, December 13, 2011 9:39 PM
Subject: Re: [Amps] Warm up and on time question...


>
> I asked Alpha amps tech this question and otherwise the received wisdom 
> over the years agrees with this.... Turn on is the worst thing that can 
> happen to something with a filliament, like a light bulb or a tube.  This 
> is why most tube amps have inrush protection warm up delay, which I call 
> the LONGEST 3 MINUTES IN HAM RADIO. Alpha said that if the off time was to 
> be a day or more, turn it off, but for a few hours, or even 10 or 12 
> hours, better to leave it ON. I am hearing more and more hams worrying 
> about "wearing out" their gear....Believe me, if you are 60+ years old, 
> the radios will be working just fine as they place them in your coffin to 
> go to the great beyond with you.............  or your survivors will be 
> selling them operational to the 8 or 10 hams still under age of 40 by 
> then.  73,
>
> Charles Harpole
> k4vud at hotmail.com
> > From: dave at nk7z.net
>> To: amps at contesting.com
>> Date: Tue, 13 Dec 2011 07:30:30 -0800
>> Subject: [Amps] Warm up and on time question...
>>
>> Hello,
>>
>> I have an AL-82, my habit is to turn it on, allow it to warm for about 5
>> minutes prior to use, use the amp, then turn it back off.  Sometimes I
>> find that I will be using the amp again within 10 or 15 minutes, maybe
>> 30 minutes.  Is it better to leave it on for the half hour, or turn it
>> off then re power it 30 minutes later.
>>
>> Does this cause any issues over the long term?  Should I just leave it
>> on for the half hour?  Worried about repeated heating and cooling of the
>> tubes.
>>
>> Dave
>> NK7Z
>>
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