[Hallicrafters] ASTRON supplies

[rev. don]

I have a RS 35 that the lightening took out the regulator,I think.
It motorboated when first turned on,then the 2N3771 opened, after replacing
there is no output and the TIP29 has 27 volts on all 3 leads. I replaced it 
and
same thing. Replaced the LM723 with good one from 20 amp supply.same 
symptoms.
LM723 worked OK when reinstalled in 20 amp supply.
Does anyone make a replacement regulator board?
I may just make one with a LM317 if not available.
Don W4BWS
----- Original Message ----- 
From: "Jim Wilhite" <w5jo at brightok.net>
Cc: <hallicrafters at mailman.qth.net>
Sent: Wednesday, August 27, 2008 7:42 AM
Subject: Re: [Hallicrafters] ASTRON supplies


>I have a RS-70M that started giving trouble early this week.  The voltage 
>would pin the meter to the right for a bit then the supply would kick off. 
>That made me take the lid off and look and I found that the fan was wired 
>wrong.  Both leads from the fan were across the same side of the AC line.
>
> I don't know if the supply heated enough to cause the problem or not, but 
> I hope that is what the deal is.  I initially though the fan was bad 
> because I couldn't get it to come on using a heat gun so I disconnected it 
> to try with a cheater cord.  Fortunately it worked so I don't have to 
> replace it, just rewire it correctly.
>
> The reason I say fortunately I don't have to replace it is because the fan 
> is pop riveted on the case not attached with screws and nuts.  Drilling 
> that thing off would be a real chore.  I think most of the troubles with 
> Astron supplies is the regulator board.  The regulator chip is in a 
> socket, which you cannot see unless you take the board loose.
>
> Jim/W5JO
>
>
>
> ----- Original Message ----- 
> From: "Roger (K8RI)" <hallicraftersgroup at rogerhalstead.com>
>
>
>
>> Another data point..points.
>>
>> I purchased a RS 35M.  The voltage was near the limit on the meter, but 
>> that is still within to stated tolerance. After about 15 minutes of use 
>> it kicked out. After that It would only kick on and off. As it was just 
>> out of the box the dealer replaced it. This one ran well...for several 
>> hours until the fan kicked on. It sounded like a motor boat.  A quick 
>> check showed nothing stuck in the fan.  I removed it and found that when 
>> rotating the fan back and fourth the blades were catching on "something", 
>> but I could slide a piece of paper all around the blades so it's inside 
>> the motor housing.  I called Astron and they said they'd get a new fan 
>> out to me right away.  That was over a month ago.
>
> ______________________________________________________________
>