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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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12th Apr 2021, 3:07 pm | #1 |
Pentode
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 212
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KG1 and 16K9 substitutes
What would be best to use as substitutes for these diodes and all other diodes in a Mk11 Avo VCM.
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12th Apr 2021, 5:41 pm | #2 |
Octode
Join Date: May 2009
Location: Linkoping, Sweden
Posts: 1,465
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Re: KG1 and 16K9 substitutes
Have you read the excellent article by Euan MacKenzie in Radio Bygones #134 Cristmas 2011 or the excellent article by Gary Tempest in Radiophile Summer 2000?
Repairs and restorations of the AVO Mk I & II are discussed there and the diodes are discussed in detail. Soft recovery diodes like the BYW96E (now obsolete) are recommended there - the equivalent to BYW96E is BYT78 according to Vishay.
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Martin, Sweden |
12th Apr 2021, 6:44 pm | #3 |
Pentode
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 212
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Re: KG1 and 16K9 substitutes
Thanks Martin. Will get both the articles and study them. I have some BYW96E
diodes so can use them. |
12th Apr 2021, 7:07 pm | #4 |
Pentode
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 212
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Re: KG1 and 16K9 substitutes
I have found a copy of Radiophile Summer 2000 but I am unable to download a copy of Radio Bygones 134 from their site. Get as far as a copy in my shopping basket but payment system does not function. Anyone out there with a hard copy they could sell me?
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12th Apr 2021, 7:17 pm | #5 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,289
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Re: KG1 and 16K9 substitutes
Here you go.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
12th Apr 2021, 9:15 pm | #6 |
Pentode
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 212
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Re: KG1 and 16K9 substitutes
Graham
Thank you for the PDF which is going to be a great help. |
14th Apr 2021, 9:31 am | #7 |
Pentode
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 212
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Re: KG1 and 16K9 substitutes
Original capacitors C2 and C3 in my AVO MK11 are 0.1uf I presume replacing them with the specified 0.05uf will be OK.
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