[TenTec] Model 301 Fan KIt

[Bwana Bob]

I built a "rainbow kit" temperature controller for fans for my Paragon
and power supply. It works fine, but is susceptible to RF in the shack.
I need to work on that. Also, the power supply heat sink runs a lot
hotter than the transceiver, so I believe that the power supply should
have a fan as well.


			Bob WB2VUF
Mail wrote:
> 
> 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 at cvc.net  K7DXV
> 
> ----- Original Message -----
> From: "Bill Miner" <wg6h at postoffice.pacbell.net>
> To: <tentec at 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
> > >
> > > _______________________________________________
> > > TenTec mailing list
> > > TenTec at contesting.com
> > > http://lists.contesting.com/mailman/listinfo/tentec
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec at contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> 
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec