[Amps] Tubes, transistors, and 'abuse'

[Thomas Walsh]

Cathy, I have a tube with handles that actually heats the basement in
the winter just idling! I wonder if there's any transistor that can do
that?
I know one thing, if I ever build a SS amp, it will be water cooled so
guess what? No heating the house unless you hook that fish tank pump
into the main hot water tank...and it will be connected to a resonant
load with NO tuner! haha ;)


On Tue, 2017-04-11 at 12:12 +0000, Catherine James wrote:
> Bill Turner <dezrat at outlook.com> wrote:
> > Cathy James <n5wvr at arrl.net> wrote:
>  
> >> I've lost track of the number of times I've had to replace the IRF510 MOSFETs in my HFPacker 35
> >> watt amp.  This is a good little amp, but it eats IRF510 transistors for breakfast. It is Class A, with two
> >> devices in parallel.
>  
> > Did you miss where I said "when not abused"?  
> 
> Did you miss where I said "When 'pick up the component in your hand' qualifies as 'abuse', you have an issue"?
> 
> > I'm sure you are not personally abusing them, but something in the environment is
> > and they are clearly not being properly protected. 
> 
> Again, the point is that they require extreme protection. Tubes don't.
>  
> > When you handle them, do you have an anti-static mat and wear a ground wrist strap?
> 
> In my previous email, I wrote "I'm reasonably careful, avoiding unnecessary component handling during installation,
> and wearing a grounding strap on my wrist."  No, I don't have an anti-static mat.
> 
> When you handle tubes, do you use an anti-static mat? :-)
>  
> 73,
> Cathy
> N5WVR
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