[Hallicrafters] HT-33A Fan Assembly Needed

[garyislander]

Thanks Al, Bob and Paul for your input.

Al, not necessary to pull that monster out for a picture.
I looked at your link and that was a different rebuild.
I see the 6 OA2's in the remote power supply which was the major upgrade to 
the 33B.
I have a connection with a fan manufacturer and maybe I can get something 
that I can make fit.
First to see what shape the unit is really in.....................once I get 
it moved from the garage.
As we all know, a chore by itself!
The finals' condition will be another situation.
Thanks everyone again for your input.
Gary K1MQ



----- Original Message ----- 
From: "Al Parker" <anchor at ec.rr.com>
To: "garyislander" <gary at garyislander.com>
Cc: <Hallicrafters at mailman.qth.net>
Sent: Friday, April 16, 2010 4:05 PM
Subject: Re: [Hallicrafters] HT-33A Fan Assembly Needed


> Hi Gary,
> Yup, you've got it.  I think some of the guys haven't realized that
> this tube is an external anode, finned, air cooled, tube similar in
> configuration, but bigger, to  a 4CX350 series, etc.  It requires a
> specific air flow to properly cool it, and that necessitates more
> pressure than what's required to cool glass 3-500's, 4-400's, etc.
> I had a "modified" HT-33 for several yrs, but sold it last yr due to
> acquiring a Henry 3-KA which replaced it.  You can see at
> <http://www.boatanchors.org/HT-33hb.htm>  I thought there might be a pic
> of the bottom, showing the fan, but guess not.  I do have a complete,
> nearly original, HT-33B that I can drag out & get pix or info if you
> need.  It's a future project, I do have one good tube for it.  There've
> been threads on the Halli & BA reflectors every so often abt those
> tubes, and the fact that most glass ones are gassy by now.  It's said
> that keeping filament voltage on them every month or 3 is helpful,it
> might be, but it won't restore a real flat one (experience).
> 73,
> Al, W8UT
> www.boatanchors.org
> www.hammarlund.info
>
>
>
> On 4/16/2010 3:53 PM, garyislander wrote:
>> Thanks Al,
>> Thats what it looks like to me.
>> A large dia. fan with about 8-10 blades.
>> It seems to be slightly larger in dia. than the tube and shroud.
>> It mounts below the PL-172 tube socket.
>> The case bottom vent plate is missing along with the fan assembly.
>> This amp probably had problems years ago.
>> But for free....I will try to salvage it if I can.
>> Most likely worth the effort.
>> Gary K1MQ
>>
>> ----- Original Message ----- From: "Al Parker" <anchor at ec.rr.com>
>> To: "Halliqth" <hallicrafters at mailman.qth.net>
>> Cc: "garyislander" <gary at garyislander.com>
>> Sent: Friday, April 16, 2010 3:40 PM
>> Subject: Re: [Hallicrafters] HT-33A Fan Assembly Needed
>>
>>
>>> The HT-33 fan is 6 or more inches in dia., not just a small muffin fan.
>>> It provides cooling air under some pressure to the tube, which is in a
>>> shroud.
>>> 73,
>>> Al, W8UT
>>>
> ______________________________________________________________
> Hallicrafters mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Hallicrafters at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>