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  1. bertus

    Relays

    Hello, The relays are single contact. When no power is on the relays, the NC is connected to the COM. When there is power on the relays, the NO is connedted to the COM. Bertus
  2. bertus

    Relays

    Hello, Perhaps this drawing wil help you: Bertus
  3. bertus

    Coronavirus transmission prevention device.

    Hello, On the AAC this was posted: Bertus
  4. bertus

    AV Receiver Power diagnosis help please

    Hello, You can more often see some glue like substance around capacitors. Sometimes it is a kind of silicon paste. It can be for mechanical stability. Is the fuse shown on the picture OK ? Bertus
  5. bertus

    Overlapping text in old style forum page.

    Hello, When 7 browsers give the same result, it must be an underlaying problem. It could be that it is the fact that I am using a linux PC (opensuse). Bertus
  6. bertus

    Overlapping text in old style forum page.

    Hello, @eerob , could you have a look. Bertus
  7. bertus

    Overlapping text in old style forum page.

    Hello, As it is a read only archive, I would suggest to remove the "Latest: Denon UD_M30 Zeppo, Dec 6, 2018" message. Bertus
  8. bertus

    Overlapping text in old style forum page.

    Hello, I have also checked in Opera, chromium and Vivaldi and the same issue is occuring. I do not have more than the 7 browsers I tested. Bertus
  9. bertus

    Overlapping text in old style forum page.

    Hello, I have checked it in Firefox , Web , Konquerer and Falkon. All show the picture I posted. I am using the default width. Bertus
  10. bertus

    BD400 transistor equivalent.

    Hello, The 2N2219 has only a max power of 800 mW. Using it as amplifier it will likely put out about 400 mW max. Bertus
  11. bertus

    Question CR2032 battery

    Hello, The given page tell you this: H225: Highly Flammable liquid and vapor [Danger Flammable liquids] H332: Harmful if inhaled [Warning Acute toxicity, inhalation] H360FD: May damage fertility; May damage the unborn child [Danger Reproductive toxicity] Bertus
  12. bertus

    BD400 transistor equivalent.

    Hello, The 2N3866 will be capable of about 1 Watt. The 2N4427 (mentioned in the 2N3866 datasheet) will work better on 12 Volts and also be capable of about 1 Watt. The 2N3553 will be capable of about 3 Watt. Bertus
  13. bertus

    Question CR2032 battery

    Hello, There can be an hazardus chemical in the battery called 1,2-dimethoxyethane. https://pubchem.ncbi.nlm.nih.gov/compound/1_2-dimethoxyethane Bertus
  14. bertus

    Overlapping text in old style forum page.

    Hello, I noticed that some text is overlapping in the archive part index of the forum: You now can hardly see the "electronic components" button. Bertus
  15. bertus

    Basic Electronic Tutors (Seattle)

    Hello, If you want to learn the basics of electronics with some tests, have a look at the worksheets on the partner site AAC: https://www.allaboutcircuits.com/worksheets/ The worksheets are related to the "lessons in electronic circuits" on the bottom of the main forum page...
  16. bertus

    BD400 transistor equivalent.

    Hello, Again no transistor types given. I found a similar schematic here: http://wiki.rc-network.de/index.php/Datei:Varioprop_8SAM_1.JPG Looking at the inner of the system, the power can not be that much: http://wiki.rc-network.de/index.php/Datei:Varioprop12S_3.jpg Bertus
  17. bertus

    BD400 transistor equivalent.

    Hello, It is also strange that in the pulse part of the schematic, the transistor types are given, but not in the RF part. Where did you find the schematic? Was it on a website? Perhaps there is more info over there. Bertus
  18. bertus

    BD400 transistor equivalent.

    Hello, I would expect a HF transistor on that position, rather than a power transistor. The 2N3866, 2N3553 or BFY50 come in mind. Bertus
  19. bertus

    Philips DS 9000 no power problem

    Hello, As you said yourself, you posted your question on a very old thread.: https://www.electronicspoint.com/forums/threads/philips-ds-9000-no-power.263718/ I have moved your post to a thread of your own, so you might get more attention. Bertus
  20. bertus

    BD400 transistor equivalent.

    Hello, It is weird that a BD400 with an Ft of only 0.5 MHz is used in a 27 MHz transmitter. For that posistion you would need a transistor with a Ft of at least 100 MHz, to have any effect. Bertus
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