[Boatanchors] [Hammarlund] IF transformers

[Patrick]

I've repaired one IF can in a HQ-170 this way.  The cap inside the IF 
can had shorted and took out a small resistor. I went slow and took 
digital photos. The photos are really worth the time when the work is 
spread out over an evening or two. If you don't have a camera with a 
good close up lens pencil on paper stretching works okay too.

I ending up mounting the replacement cap just under and outside the IF 
coil because I couldn't determine what value was needed.  I tacked 
different values in place until one tuned okay.

It would have been a big help to know the correct replacement value 
prior to dis-assembly.  I never found where that was published.

I've got a HQ-145, 170, and 180. This one IF can is the only one needing 
repair (so far).

Pat
wa4tuk


On 2/13/2010 5:58 PM, Carl wrote:
> Those caps are going to fail sooner or later so may as well do them now.
>
> Carl
>
>
> ----- Original Message -----
> From: "Paul Kraemer"<elespe at lisco.com>
> To:<hammarlund at mailman.qth.net>; "Old Tube Radios"
> <boatanchors at theporch.com>;<boatanchors at qth.net>; "BOATANCHORS"
> <boatanchors at mailman.qth.net>;<BOATANCHORS at LISTSERV.TEMPE.GOV>;
> <boatanchors at lists.tempe.gov>
> Sent: Saturday, February 13, 2010 5:05 PM
> Subject: [Boatanchors] IF transformers
>
>
>    
>> Anyone had any experience repairing the K tran style if transformers like
>> used in HQ-100 and many others?
>> This is in reference to the riveted plate affair in the bottom that forms
>> the capacitors needed to resonate the windings.
>> I have one that the assembly is loose. I don't see an effective way to
>> tighten the rivet.
>> My gut says Dremel it out and replace with two sm caps the correct value
>> but
>> would rather excercise a little caution and ask if someone else had the
>> same
>> experience and how they corrected it.
>> Thanks in advance
>> Paul K0UYA
>>
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