[Amps] Cooling (GS35B)

[Gary Schafer]

That would seem that you don't have a big enough blower to produce the 
needed back pressure required. Measuring the back pressure in the 
chassis with a simple manometer will tell the story. A clear hose with a 
loop with water in it.

A bigger blower sometimes means a larger wheel and or higher speed.
Just a higher cfm blower may not do anything if it can't produce enough 
pressure. A low speed blower gets choked down quickly when working into 
pressure and its flow drops like a rock.

73
Gary  K4FMX


Tony King - W4ZT wrote:
> Robert,
> 
> I've also noticed that blowing air from the end will not provide enough
> air to the tube on the opposite end. It's the old "hole in the hose"
> problem. The air is best blown in at the mid point between the tubes
> either from the bottom or the long side.
> 
> 73, Tony W4ZT
> 
> Robert Thain wrote:
> 
>> Thank you to everybody who replied.
>>
>> We were working on the amp over the weekend and found
>> that the blower 'should' have been capable of
>> producing the flow but wasn't. So we borrowed a MUCH
>> bigger blower and found that we had exactly the same
>> flow rate !!!!
>> We found that in the anode compartment, in one half we
>> had air flowing and one the other NOTHING at all , no
>> matter how big the blower was. We were blowing from
>> the side. We did a simple test and blew straight in
>> from the base and this made a big difference.
>>  
>> We are pretty sure that the initial problem is due to
>> turbulence and we will work on some baffles or duct
>> the air. Has anybody already had this problem, Been there done
>> that .....
>> Thanks again
>> Robert 
>>
>>
>>     
>>     
>>        
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