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Hitachi HA-4700 Repair and Restoration
Hitachi HA-4700 Repair and Restoration
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Old 3rd June 2019, 12:32 PM   #11
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
Good job, guy. I suggest as an idea, to place a short piece of aluminum paper or sheet, between the leds and the darkened wall behind the leds, in one of the last pictures.
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Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
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Old 10th June 2019, 10:36 AM   #12
ubergeeknz is offline ubergeeknz  New Zealand
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Bit more work tonight. Test fit a mini switch in place of the one I broke. I'll need to 3d print an adapter but it should work here.


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Good job, guy. I suggest as an idea, to place a short piece of aluminum paper or sheet, between the leds and the darkened wall behind the leds, in one of the last pictures.
I pulled the burnt plastic piece out, gently warmed and straightened it out and gave it a good clean, a light sand, and a shot of gray primer. We'll see how it turns out, if not good, I'll fashion a replacement piece of aluminium or something. Maybe another job for 3d printing?

Still haven't figured out a practical solution for the rust hole in the top cover. I think brazing a small piece in may work but it's going to be rather fiddly.IMG_20190610_214051_674.jpgIMG_20190610_214701.jpg
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