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Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE! |
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13th Nov 2018, 5:06 pm | #1 |
Triode
Join Date: Jul 2018
Location: Oxfordshire, UK.
Posts: 34
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McMichael 471 Restoration
This was my second restoration. It is a 5 valve inc power supply rectifier.
The transformer had a bad voltage change contact, the reservoir cap was really leaky. I fixed the contact and replaced the cap. So far so good. On the main chassis, I found that most of the wax capacitors 0.1uF or higher were really leaky, so replaced those with new polyester ones. There is a screened (metalised) IF amplifier tube in there, which I found had lost it's screening, due to general rot. I found I was able to temporarily wrap it with aluminium foil, and earth, which worked! The magic eye was pretty much worn out, which was a shame, as I was looking forward to seeing that in action. I managed to find new old stock replacements for the EM34 magic eye and the EF39 tube. So, with that lot in place, it was pretty much good to go. I didn't do a lot with the cabinet, just a bit of danish oil, and I also tried to clean the speaker clock (damaging it in the process) I'll have another go at the cabinet when I have time. At the moment, I'm fairly happy with getting the electronics working. Pictures attached Cheers Tam |
13th Nov 2018, 5:35 pm | #2 |
Octode
Join Date: Dec 2010
Location: St Ives, Cambridgeshire, UK.
Posts: 1,180
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Re: McMichael 471 Restoration
Nice work. Grille cloth is a nightmare to get within these shores.
Andrew
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Invisible airwaves crackle with life. Or they should do. BVWS Member |
13th Nov 2018, 6:41 pm | #3 |
Dekatron
Join Date: Feb 2009
Location: Chesterfield, Derbyshire, UK.
Posts: 3,763
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Re: McMichael 471 Restoration
Very nice Tam I must say the EM34 look very bright indeed ,you should be able to obtain some speaker cloth in keeping with the original, keep up the good work .Mick.
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