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  1. 73's de Edd

    Small DC TIG welder remote switch needed

    . Sir Clambake . . . . . . . On your two . . . .LM324 . . .4 section operational amplifiers . . . . . being common as dirt / multi decade design workhorses . . . . flat pack I.C.'s that you identified . . . I would surmise that the one near the "beeper" has two of its sections used for...
  2. 73's de Edd

    Need help identifying capacitors

    . Sir Subtox . . . . . . . Thank goodness you gave us that photo, as some of those particular types are the very-very-very worse that I have ever seen in surface mount electrolytics. They have a high failure rate in their leaking out their electrolyte blend of caustic salts mixed with a...
  3. 73's de Edd

    vacuum fluorescent display (VFD) help

    . Sir looxuser . . . . . . STRANGE . . .but your first query on your other AIWA thread was relevant to some parts used in a VFD display of your old AIWA. Of course that was in no way, related to your current problem you are having on that unit. That PROBABLY accounts for the stored...
  4. 73's de Edd

    Small DC TIG welder remote switch needed

    . Sir Clambake . . . . . . . Some observations and info that I need feedback from you on, in an eyball observation of board details. Good job on the photos supplied as that is 'soitanly one densely packed "brick". I am hereafter assigning them #'s from top left corner to bottom right corner...
  5. 73's de Edd

    Small DC TIG welder remote switch needed

    . Sir Clambake . . . . . . . . . . Ahhhhhh Sooooooo, you are now coming forward with the much needed info. REFERENCE: That pot assemblies switch connections are the YELLOW CIRCLES, the RED circles were just differentiating from the non significant pot support mounting brackets. Mamma-...
  6. 73's de Edd

    Old Betamax channel indicator lights, not LED.

    . Sir Sparklezap . . . . . Get ready to have cornered the US market on them. As this should be a lifetime supply for you . . . . . ...
  7. 73's de Edd

    Small DC TIG welder remote switch needed

    . Sir Clambake . . . . . . . I initially was surprised to see an Amerikanski sourced posting using a "torch" reference. If the purpose is to illuminate a proposed pre observed welding position before initiating the weld, wouldn't the problem highly be simplified by the use of the HIGH...
  8. 73's de Edd

    Need help identifying capacitors

    Still need to know the parts locations on a board (s) . . . . .but after consulting its schematic . . . . .it seems like they have a HIGH proclivity of assigning 6.3, 16 and 25 Vdc ratings for its electrolytics.
  9. 73's de Edd

    heathkitt temp sensor diagram lm35dz trans

    That "transistor" is in reality, being a complex integrated circuit in a micro packaging. Research that number on Google and see what you REALLY have there and where in South Africa that you can find one. It's not going to be on the shelf at a local market. Considering that the unit IS EVEN...
  10. 73's de Edd

    Need help identifying capacitors

    Will have to research the schema later. . . .but that numbering just shouts . . . .10 microfarads at a 16 Vdc rating. 73's de Edd
  11. 73's de Edd

    Troubleshooting welder wire speed control

    Indeed the unit is being an SCR / Thyristor . . . .and with it even utilizing an intelligent numbering system . . .wherein you immediately know of the 400 volt rating and the 12 amp current spec. I overlaid some components from one side of the board to the other to relate a part to its...
  12. 73's de Edd

    Troubleshooting welder wire speed control

    . Sir OlsonKrist . . . . . . . I think that you are just going to have a crunched TYN 412 from its K to A and as a precaution, also check the two larger black 1N4007 diode units. Parts: And no, you would not want a log taper pot in that unit , you just want a linear change with rotation...
  13. 73's de Edd

    Troubleshooting welder wire speed control

    . Sir OlsonKrist . . . . . . . I'll bets all my munneys on the " bob tail nag" . But my very HIGHEST suspicion is marked item #1 with secondary importance at item #2. I would suspect that pot to be OK and minimally on UPWARD from a 1 K value.. Measure for the resistance from center pin...
  14. 73's de Edd

    remote controlled toy receiver ckt problem

    . Sir amjad daud . . . . . . . Is my eyesight grossly failing me . . .or . . . . or . . . .or . . . .am I seeing a remote controlled board / plank there ? You say the unit responds to your initial RF signal and starts the units propulsion motor running. Now with us still being very cold...
  15. 73's de Edd

    Simple Conversion from Battery to Plug-In

    Sir Bluewaterpig . . . . . . . If you opt for the other units mounting . . . .and with Switchcraft not even giving any terminal referencing on their Engineering drawing . . . along with your initial qualifying : You might be giving me a little too much credit, cause I don't really...
  16. 73's de Edd

    B & O Penta amplifier repair and Tr equivalents

    Aside comment . . . . . coming from up in the Peanut Gallery . . . . Considering the fact that R59 adjustment is adjusting the balance of either +68 or - 68 volts ending on that audio output rail down to a differentilal of a mere .64 VDC , you should be OK.. It probably was having very close to...
  17. 73's de Edd

    Identify diodes

    Absolutely . . . . .give us the model number of that Pioneer unit.
  18. 73's de Edd

    Amplifier Repair - electrolytic capacitors expose metal top?

    . Sir looxuser. . . . . Of the resistors shown, we would be wanting to use the smallest ones with long leads. With a value of approx 1K to manually address in a logic HI signal and the lower 100 ohm or so resistors to manually address in a logic LO signal We are involved with 3 CMOS logic...
  19. 73's de Edd

    Simple Conversion from Battery to Plug-In

    Sir Bluewaterpig . . . . . Why 'soitanly . . . . . . and would ye be needing me to give you the right handed or the left handed instructions ? Let's utilize barrel connectors with the female version mounted in your case. With that roomy case, its even having enough space to mount a female...
  20. 73's de Edd

    Need help for my Panasonic SA-AK88

    Sir Carl_0201 . . . . . . Thats good ! . . .now we don't have to worry about the possibility of any speakers being the fault. Basically what you are now having come from the surround speakers is a weak "pink noise" and in order to even hear that noise, we must have several earlier gain...
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