Hi Bill:
It has been discussed in the group that you can connect the fans in
series and
they will run at half speed, good idea to keep CONSTANT AIR FLOW.
I would run the fans all of the time my self. You could wire
a series parallel toggle switch in the circuit to change speed, but unless
running
digital you would be ok with series fans.
Ed 73 ewell2@cvc.net K7DXV
----- Original Message -----
From: "Bill Miner" <wg6h@postoffice.pacbell.net>
To: <tentec@contesting.com>
Sent: Thursday, May 01, 2003 1:04 AM
Subject: Re: [TenTec] Model 301 Fan KIt
> Bill,
>
> I too just received my 301 fan kit today and read the same remark in the
> instructions.
>
> My experience so far with the ORION is that the PA heat sink stays
> pretty cool during casual operation and even general rag chewing. I
> have not operated in any contests and have not used any digital modes
> yet.
>
> It seems to me that if you do mount the fan kit you should probably keep
> it plugged in and operating as it does block air movement to the cooling
> fins while in place. I believe it may tend to restrict natural
> convection cooling.
>
> A quick test shows the fan to be fairly quiet but it is nearly silent
> when operating on 6 volts instead of 13.8 volts. It still moves a fair
> amount of air and seems to start reliably at 6 volts. If you are really
> bothered by fan noise another solution could be to build a simple
> temperature controller for the fan or maybe just build a control circuit
> that would have the fan run only while transmitting. Sounds like a good
> QST construction article for someone to write.
>
> 73,
> Bill - K6WLM
>
> Bill Brannick wrote:
> >
> > I ordered one of these and it came via UPS this afternoon.
> >
> > The accompanying flyer did give me "pause for thought" The
> > last sentence says: "The fan is quiet but if it's sound
> > bothers you, just unplug it!"
> >
> > Please don't interpret this as a criticism, but it almost
> > sounds like Ten-Tec feels that the fan's really is not
> > necessary.
> >
> > I was one of those who lost the finals in my Jupiter early
> > on, for reasons unknown.. so even if it is not "necessary" it
> > does address my "comfort level" somewhat.
> >
> > Bill, W6WLB
> >
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>
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