Swapmeet spreadsheet! [Sudbrink]
I've added some things to the For Sale Sheet.
Bill, the H88 on your sheet entry. Can you check the CRT to see if the neck is open? Or clean the CRT face? From the photo, it's hard to tell the issue. I don't recommend powering up the H88. The tantalum caps on the +12 /+18V line tend to short out and burn up traces. It's because 120V AC line voltage raises the 18 volts to more like 21V which exceeds the 20V rating of the caps. That, and age. The H88/89/19 expects 110VAC. Regards Herb -- Herbert R. Johnson, New Jersey USA https://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT comcast DOT net
Hi Herb, Well aware of the issues with tants and vintage equipment. I've replaced plenty in my time. The CRT in the 88 appears good. What looks like phosphor blasted off the inside is just an unfortunate pattern of dust. All of the things I will be bringing to the swap meet have been stored in a cool, dry, climate controlled (if somewhat dusty) storage unit. Bill S. On 6/4/2023 1:08 PM, Herbert Johnson via vcf-midatlantic wrote:
I've added some things to the For Sale Sheet.
Bill, the H88 on your sheet entry. Can you check the CRT to see if the neck is open? Or clean the CRT face? From the photo, it's hard to tell the issue.
I don't recommend powering up the H88. The tantalum caps on the +12 /+18V line tend to short out and burn up traces. It's because 120V AC line voltage raises the 18 volts to more like 21V which exceeds the 20V rating of the caps. That, and age. The H88/89/19 expects 110VAC.
Regards Herb
-- This email has been checked for viruses by Avast antivirus software. www.avast.com
If the phosphor looks like it got blasted off the inside of the CRT than it is most likely air got inside and it is broken physically. Sent from: My extremely complicated, hand held electronic device.
On Jun 4, 2023, at 1:20 PM, William Sudbrink via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
Hi Herb,
Well aware of the issues with tants and vintage equipment. I've replaced plenty in my time. The CRT in the 88 appears good. What looks like phosphor blasted off the inside is just an unfortunate pattern of dust. All of the things I will be bringing to the swap meet have been stored in a cool, dry, climate controlled (if somewhat dusty) storage unit.
Bill S.
On 6/4/2023 1:08 PM, Herbert Johnson via vcf-midatlantic wrote:
I've added some things to the For Sale Sheet.
Bill, the H88 on your sheet entry. Can you check the CRT to see if the neck is open? Or clean the CRT face? From the photo, it's hard to tell the issue.
I don't recommend powering up the H88. The tantalum caps on the +12 /+18V line tend to short out and burn up traces. It's because 120V AC line voltage raises the 18 volts to more like 21V which exceeds the 20V rating of the caps. That, and age. The H88/89/19 expects 110VAC.
Regards Herb
-- This email has been checked for viruses by Avast antivirus software. www.avast.com
No phosphor is blasted off of the inside of the CRT. It's just dust on the CRT face. On 6/4/2023 2:50 PM, Sentrytv wrote:
If the phosphor looks like it got blasted off the inside of the CRT than it is most likely air got inside and it is broken physically.
Sent from: My extremely complicated, hand held electronic device.
On Jun 4, 2023, at 1:20 PM, William Sudbrink via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
Hi Herb,
Well aware of the issues with tants and vintage equipment. I've replaced plenty in my time. The CRT in the 88 appears good. What looks like phosphor blasted off the inside is just an unfortunate pattern of dust. All of the things I will be bringing to the swap meet have been stored in a cool, dry, climate controlled (if somewhat dusty) storage unit.
Bill S.
On 6/4/2023 1:08 PM, Herbert Johnson via vcf-midatlantic wrote:
I've added some things to the For Sale Sheet. Bill, the H88 on your sheet entry. Can you check the CRT to see if the neck is open? Or clean the CRT face? From the photo, it's hard to tell the issue.
I don't recommend powering up the H88. The tantalum caps on the +12 /+18V line tend to short out and burn up traces. It's because 120V AC line voltage raises the 18 volts to more like 21V which exceeds the 20V rating of the caps. That, and age. The H88/89/19 expects 110VAC.
Regards Herb
-- This email has been checked for viruses by Avast antivirus software. www.avast.com
participants (3)
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Herbert Johnson -
Sentrytv -
William Sudbrink