Comments on: Made An ECL82 Output Vacuum Tube Tester

By: Joseph

Joseph — Fri, 02 Apr 2021 08:39:40 +0000

Hello sir.what is your opinion on. replacing rectifier tube by diodes.

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By: Parasuraman S

Parasuraman S — Mon, 25 Jan 2021 06:15:21 +0000

Just make a power supply and circuit suitable for these valves, studying openly available circuits. That's all! You need filament voltage extra in the transformer. All the best. (A common single tester for all these valves are not practically not possible)

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By: Mike Retz

Mike Retz — Sun, 22 Nov 2020 22:00:21 +0000

In reply to Parasuraman S.

Hi love your description of drilling hole . My father was a tool and die man in Detroit mich. . I learned a lot from him. Those drill bits are for wood not metal . Next time if you start with small drill bit say 1/4 inch it will go a lot smoother. Next you can use a small half round file to make hole bigger or a dremel drill will go a lot faster and smoother. Make hole as big as tube socket then trace two small mounting holes for socket mounting. You can use small drill bits in dremel or any size grinding stone that you want. Available on eBay for cheap . Dremel is trade name and sold by several different manufacturers. I was tv technician for many years and carried a tube checker with me per boss to bring in xtra bucks. It was a b&k and had many sockets for different tubes . The one that wore out most was the 9 pin socket for the 6gh8 tube that was used as color oscillator UseD in aot of rca chassis . It was a HughE seller And brought in a lot of profit for shop! And rca service co. Now defunct. I git pretty good at checking tubes but was always honest with customer... I found out that you get many repeat customers when they find out they can trust you. Have a great day!! And God bless...

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By: Myles McDonald

Myles McDonald — Sun, 22 Nov 2020 16:42:36 +0000

Thank you for the article. I am starting to learn about valves, and would like to have a tester to test some common valves such as 12ax7, el84,el34,kt66,kt88, etc. Could your tester be used for this?. Nothing fancy, just a rating on good or bad tube.

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By: Parasuraman S

Parasuraman S — Wed, 18 Nov 2020 03:27:22 +0000

In reply to Humberto.

Many thanks!

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By: Humberto

Humberto — Tue, 17 Nov 2020 03:57:40 +0000

Excellent Project with Vacuum Tubes.

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By: Parasuraman S

Parasuraman S — Tue, 17 Nov 2020 03:07:55 +0000

In reply to A L PANDIT.

Audio signal can be fed to the Tuning Indicator valve. I had done it and has covered it in my Article on HMV Radio repair. Many thanks!

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By: A L PANDIT

A L PANDIT — Sun, 15 Nov 2020 12:10:59 +0000

In reply to Parasuraman S.

It took be back to 1967 when I was in college and study engineering electronics with practical repairing of valve radios. EM 84 is tuning indicator, how you have used for this testing project? Enjoyed the article and your zeal for this test.
Regards,

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By: Parasuraman S

Parasuraman S — Sun, 15 Nov 2020 10:21:21 +0000

In reply to Bruce Saxby.

Many thanks for your encouraging comments!

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By: Parasuraman S

Parasuraman S — Sun, 15 Nov 2020 10:20:47 +0000

In reply to Mikael Hansen.

Yes, that's why I used the PC ATX SMPS Case! Many thanks!

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