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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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Thread Tools |
31st Aug 2021, 1:05 pm | #21 | |
Rest in Peace
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
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Re: Tube aka Valve Tester design
Quote:
Alternatively, use a suitable external d.c. source - as I have suggested. Al. |
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31st Aug 2021, 1:24 pm | #22 |
Octode
Join Date: May 2009
Location: Linkoping, Sweden
Posts: 1,465
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Re: Tube aka Valve Tester design
There are some nice school & physics power supplies like the IMPO ES 11.17 for 0-25VDC @6A which also has 0-30VAC @6A for heater voltages, with separate outputs for AC & DC.
IMPO also have a high voltage power supply IMPO ES 11.28 with 0-500V @ 50mA and 0-50V @15mA which works nicely for Anode & Grid Voltages, if you need a different Screen voltage you need a second one. Unfortunately the IMPO series are discontinued but they regularly turn up on auction sites and there are other brands with similar specification for school/laboratory use that will do just as fine. With these two power supplies you can test a lot of valves. /Martin
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Martin, Sweden |
31st Aug 2021, 8:15 pm | #23 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Tube aka Valve Tester design
Hi Folks, note that some of these supplies are variac based, but unlike normal variacs they have an isolated primary winding and the sec is the variac.
Very useful pieces of kit Ed |
5th Sep 2021, 4:57 pm | #24 |
Heptode
Join Date: May 2017
Location: Konongo, Ghana
Posts: 516
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Re: Tube aka Valve Tester design
This morning I uploaded my collection of data/pictures/etc. on valve testers to Google Drive. Maybe it can be of use for TS.
https://drive.google.com/drive/folde...Z3tFoaZxcrU7F2
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Robert |