[Boatanchors] Need magnetic shield for shaded pole motor

[J. Forster]

Try eBay for a DC motor of the size/form factor you want. Also tge various
web surplus stores. Possibly even Grainger.

FWIW,

-John

================


> Good afternoon John,
>
> The original blower is capable of 65cuft/min without restrictions.  When
> blowing through a pair of 8122's the pressure is much higher; the volume
> is
> reduced to 22 ft/min.  The squirrel cage fan is much more efficient and
> quieter than a bladed fan for large air volume in the presence of back
> pressure.  The seller says the fan is very quiet at 5 volts but says
> nothing
> about 24 volts.  I sent a question requesting the HP delivered to the
> blade.
> The electrical HP is approximately 1/128th HP but what is delivered to the
> blade?  If it's 1/150th or better I'll try it and thanks for the response
> John.
>
> I would be very interested in a DC motor with a shaft that I could use to
> drive the blower wheel having the same dimensions as the ebay item.
>
> -----Original Message-----
> From: J. Forster
> Sent: Thursday, January 02, 2014 3:17 PM
> To: james.liles at comcast.net
> Cc: boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] Need magnetic shield for shaded pole motor
>
> The air capacity is easy:  eBay  310310219077, for example.
>
> -John
>
> ============
>
>
>> Hi John,
>>
>> Both good suggestions but need 25 cuft/minute to cool a pair of 8122's.
>> Probably over kill but the 8122's need 6 cuft/min each.  Hard to get a
>> muffin fan with that volume that is quiet.  The DC motor is a good
>> suggestion but can't exceed a body depth without shaft of 2 inches and
>> will
>> have to produce 1/150Hp to 1/100Hp at 3000rpm to drive the wheel in
>> transmit
>> mode.
>>
>> I suppose an alternative would be to mount the blower outside the radio
>> and
>> connect with a hose but would truly like to retain the blower location
>> only
>> because I'm fussy about these glow in the dark historical place holders.
>>
>> Thanks again for the suggestions.
>>
>> Kindest regards Jim K9AXN
>>
>>
>>
>> -----Original Message-----
>> From: J. Forster
>> Sent: Thursday, January 02, 2014 2:44 PM
>> To: james.liles at comcast.net
>> Cc: boatanchors at mailman.qth.net
>> Subject: Re: [Boatanchors] Need magnetic shield for shaded pole motor
>>
>> Can you replace the fan with a muffin style unit, possibly a brushless
>> DC
>> version?
>>
>> -John
>
>