[Hallicrafters] HT-32 and HT-37 Transformers

[rbethman]

Quantify "widespread number of transformer failures".

That is an ambiguous statement.

Anyone can make such a statement, and it is meaningless without 
quantification.

I'm asking for more specific information.

My HT-32A has never had such a failure.  My HT-37 never had such prior 
to my getting it from the Columbus, GA Radio Club, nor during my ownership.

This is a serious request for "a far better picture of the failure rate!"

N0DGN


On 10/2/2012 4:51 PM, Glen Zook wrote:
> The widespread number of transformer failures on both the HT-32- 
> series and the HT-37 suggests that the transformer is either being run 
> on the "ragged edge" or is suffering from design faults, maybe both. 
>  Production tolerances may play some role in just how long a 
> particular transformer survives.
>
> The transformer in the Heath DX-35 is notorious for being operated 
> well outside of the capabilities of the transformer and that in the 
> Heath DX-40 is only slightly better.  Transformer failures in those 
> units are VERY well known.
> Glen, K9STH
>
> Website: http://k9sth.com
> ------------------------------------------------------------------------
> *From:* David C. Hallam <dhallam at knology.net>
> *To:* rbethman <rbethman at comcast.net>
> *Cc:* 'hallicrafters' <Hallicrafters at mailman.qth.net>
> *Sent:* Tuesday, October 2, 2012 3:31 PM
> *Subject:* Re: [Hallicrafters] HT-32 and HT-37 Transformers
>
> I have owned 3 HT-32's; HT-32, HT-32A, and HT-32B.  The HT-32 and HT-32B
> both had transformer failures.  In both cases, the transformer was
> rewound by Jess Price in Orlando, FL.  I only owned the HT-32 for about
> 3 years after the transformer was rewound so I really can't comment on
> it's longevity but the HT-32B has been going strong since 1977.
>
> David
> KW4DH
>
>
> On 10/2/2012 3:05 PM, rbethman wrote:
> > There has been a lot of discussion of this one particular transformer.
> >
> > First: Were all made by the same manufacturer?
> >
> > Second: Which of those used by Hallicrafters are the ones with the 
> issue?
> >
> > Third:  How many of each transmitter were produced?
> >
> > I ask this to get a far better picture of the failure rate!
> >
> > I propose that these were made by different manufacturers, and NOT by
> > Hallicrafters.
> >
> > Many Hallicrafters produced transformers have the Halli Logo stamped in
> > their end bells.
> >
> > In the instance of SX-99s, I have seen black end bells and I have seen
> > chrome plated end bells.
> >
> > It makes no sense whatsoever to chrome plate end bells due to extra cost
> > - UNLESS - they were obtained from a vendor that got a contract with a
> > lower price per unit.
> >
> > What say y'all?
> >
> > Bob - N0DGN
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