[AMPS] Emtron DX1

[measures]

>
>Dear Mr Breznek:
>
>Its been quite a while that I do not hear from you. I am so dissapointed
>that I can't use my amplifier. The overheathing protection circuit is on
>most of the time. I even mounted another fan exactly like the stock one
>piggyback  besides the terrible amount of noise they make it only allows
>me e few more words untill the protection circuit tripps the amp to std
>by again. I have already received messages from other hams in ZL and VK
>who also experienced the same problem. One of them said that the new DX1
>comes with the same fan that you use in the DX2. Shouldn't mine have
>this type of fan? I received it only a month ago?. I hope you solve this
>problem for me. so far I can't belive that I spent over Two thousand
>dollars on an amplifier that is usless!!!.
>
€  Jorge --cooling an axial flow anode-cooler with a fan is problematic.  
What is needed is a high-pressure blower.  There is a manufacturer in 
Ventura, California that makes high-pressure centrifugal blowers.  I 
phoned them and requested a catalog.  I will post the info here when I Rx 
it.  //  According to Svetlana's spec sheet, at 7000 feet altitude, the 
4cx800A appears to need roughly 0.95" of water column pressure.  .  //  
note -- High-pressure centrifugal blowers have relatively narrow, large 
diameter squirrel-cages that operate at c. 3400 rpm. // My guess is that 
the designer of the amplifier did not measure the air pressure delivered 
by the fan.  

cheers

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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