Gemcon capacitor replacements?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • slybunda
    Senior Member
    • Feb 2012
    • 131

    #1

    Gemcon capacitor replacements?

    taken from my thread about car alarm siren here: https://www.badcaps.net/forum/troubl...rm-siren-issue

    there are 2 caps which im looking to get replacements for.
    Branded as Gemcon
    single 100uf 16v 6.5mm x 11.5mm
    single 100uf 50v 8mm x 11.5mm
    lead spacing is around 3mm

    there is space for 16mm tall caps

    rs components is good place for me to go since its close by, what replacements do you suggest and do these need to be low esr?
    the caps have not swollen up but this alarm was fitted in 2002 so i suspect caps are probably older so maybe coming on 25 years old so would be worth replacing.​
    Attached Files
  • andrewsawesomr
    Senior Member
    • Jun 2022
    • 100
    • United States of America

    #2
    Could you measure the ESR on the capacitors?

    Comment

    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30911
      • Albion

      #3
      look for a 3 letter code on them
      https://www.paullinebarger.net/DS/Gemcon/

      or just use panasonic FR or rubycon YXF/YXG for long life

      Comment

      • andrewsawesomr
        Senior Member
        • Jun 2022
        • 100
        • United States of America

        #4
        Originally posted by stj
        look for a 3 letter code on them
        https://www.paullinebarger.net/DS/Gemcon/
        Gemcon capacitors don't put the series code on the sleeve.

        Comment

        • slybunda
          Senior Member
          • Feb 2012
          • 131

          #5
          Originally posted by andrewsawesomr

          Gemcon capacitors don't put the series code on the sleeve.
          That explains why i couldnt find it on the caps.

          Gemcon website says they are made in tiwan so guessing they are decent quality?

          Comment

          • stj
            Great Sage 齊天大聖
            • Dec 2009
            • 30911
            • Albion

            #6
            lol
            if they were decent they would print the series and datecode on them and not just use a generic sleeve

            Comment

            • andrewsawesomr
              Senior Member
              • Jun 2022
              • 100
              • United States of America

              #7
              Originally posted by stj
              lol
              if they were decent they would print the series and datecode on them and not just use a generic sleeve
              Yeah, they're not decent.

              Comment

              Related Topics

              Collapse

              • Tom41
                Honeywell Accenta G3 tamper alarm
                by Tom41
                This house has a Honeywell Accenta G3 alarm system. If the main unit loses power for any reason, the external siren sounds - even if the alarm is not even armed! Entering the code to disarm it is not an option as the keypads are completely dead when the power is out.

                I presume this means the backup battery inside the box has failed, but I can't get in there and replace it without also setting off a tamper alarm! Is there any way to disable the tamper alarm so that electrical work can be carried out with the power off? Or a way to replace the backup battery without setting off the...
                08-31-2023, 04:00 AM
              • slybunda
                Alarm Siren issue
                by slybunda
                Apologies if this is in the wrong section but being a car alarm siren that makes noise i thought it be best to put it in the audio section.
                Had weird alarm issues where siren made a strange noise: https://www.youtube.com/watch?v=ZjsqndhionU
                took siren out of the car and checked it out and pics attached seem to be the source of the issue.
                shockingly the alarm still makes its normal sound if i trigger it manually so speaker seems to be intact.
                getting a replacement is gonna be next to impossible, its a Toad Ai606 which is no longer in production and cant see to find a replacement...
                02-04-2024, 11:01 AM
              • Ady2017
                Does anyone know about 16x2 LCD screens used in alarm keypads?
                by Ady2017
                I have got an old Gardtec GT595 alarm which has got a faulty keypad with a failed LCD screen. This was apparently a very common problem with these and many people have had to replace the whole alarm because of this problem. Somebody claims to be able to repair the keypads by replacing the screen and I have tried it myself by replacing the LCD with a commonly available HD44780 1602 16x2 Serial LCD screen but it is not working. I am sure it is a problem with a driver or simular which is not allowing the screen to talk to the rest of the electronics. Does anyone know what this original screen was...
                06-02-2025, 04:56 PM
              • redwire
                Honeywell/Ademco Wave2 two-tone siren - recap, sch, pics
                by redwire
                My garage alarm siren was sounding a bit quiet and the tone was weird, like mixed with another tone.
                Powered up it draws about 14V 300mA with a spike to ~1A briefly during the low pitch yelp, seems normal.

                Teardown reveals only two electrolytic capacitors inside, so I replaced them. 100uF 25V for the warble ramp, and 47uF 16V for decoupling.
                The old ones tested OK sort of? - 100uF reads 68uF (-32%) ESR 0.80Ω, and 47uF reads 41uF ESR 0.87Ω as well so it was a bit confusing if the caps were to blame.
                The tone caps are green film caps I left alone. Newer...
                07-30-2023, 08:21 PM
              • petehall347
                100nf and 100uf precision capacitors
                by petehall347
                i am wanting to calibrate my multimeters and for this i require a 100nf and 100uf precision capacitors . trouble is i can't find them ....
                08-13-2024, 06:56 AM
              • Loading...
              • No more items.
              Working...