Ian,
Yup, that's them. Ed is a good guy to deal with. My buddy here built a
transformer tester for him which is PIC controled. It applies a set
waveform to test them if I recall. I actually purchased the chassis for
it to use on another project and didn't. It was one by LMB Heager which
looked like an old Collins style with the flip up lid on the top. I helped
my buddy when he was building it for the calculations portion of the
software. I recon it turned out pretty good and is being used on the line
today. I think this project was right before he built it.
Now Ed will be the first to tell you the same info as me on those C-cores.
Note that in the write-up, there was no mention of the word "Hipersil".
When that was ordered, the weight was the big concern and he did get about
a 20% savings on it. On a 60 pound transformer, that would be 12 pounds
or almost the weight of two gallons of milk :-) I'm not sure of the weight
on this one though.
Best,
Will
>>*********** REPLY SEPARATOR ***********
>>
>>On 4/19/05 at 6:52 AM Ian White G3SEK wrote:
>>
>>>Will Matney wrote:
>>>> I also know a guy down in Elizabethtown, Kentucky who makes them and
>>>>has done some work for some ARRL projects. They may be listed in the
>>>>new ARRL Handbook now, I'm not sure. Ed is the guys name but cant
>>>>remember the company right off, some of you might reading this.
>>>
>>>Heritage. There's a good example of his work at:
>>>http://www.gareventures.com/amplifier/dxpedition_amplifier_first_challeng
>>>e_1.htm
>>>
>>>This is the description of G3WOS's 8877 amp for 6m DXpeditions, which
>>>fits into a pilot's flight case - power supply, blower and everything.
>>>The complete write-up is very well worth reading, at:
>>>http://www.gare.co.uk/amplifier/
>>>
>>>Obviously the transformer size and weight was critical to the whole
>>>project, so Chris explains why he didn't choose "the Navy's way" - that
>>>big black object in the steel can weighed 70lb, while the bare C-core
>>>came in at just 18lb.
>>>
>>>However, that is a very special case, and it doesn't negate Will's more
>>>general points about transformers for normal home-station use.
>>>
>>>
>>>--
>>>73 from Ian G3SEK
>>>_______________________________________________
>>>Amps mailing list
>>>Amps@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>
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