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Recent content by techforce
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AN6652 Motor control IC
Working on one of these in the design of an ION Archive LP turntable. The consensus of the engineers I asked for feedback on this IC seem to say that theres not enough info supplied on the internal layout of the IC to know how to test it. I ordered a new IC, but it behaves the same way, and it... -
Schematic drawing utilities
With most electronics being disposable and non repairable, I find myself needing to reverse engineer more lately. Looking for some good resources that are free and allow you to draw decent schematics with a selection of pre-dfeined components, or other neat features. I was recommended Kicad and...- techforce
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- Replies: 2
- Forum: Project Construction Technologies
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Light bulbs as dummy load for Stereo ?
Interesting idea. Maybe a spare electric stove coil would also do the same thing. Good idea @Alec_t about the bulb in series with the speaker. -
Light bulbs as dummy load for Stereo ?
Yes as a dummy load. I was thinking a100w floodlight maybe. Just to protect the speakers from possible excess DC when doing repairs. I have something like 80mv on one channel as DC offset, and the other is about 0v , doing the tests with nothing attached to the spkr terminals. Its a Pioneer... -
Light bulbs as dummy load for Stereo ?
Was curious if anyone has done this before, instead of using resistors or other test gear as the load in place of actual speakers to protect the speakers? -
Is this a THERMAL CUT-OUT?
They sound like NTC thermistors. Thermal cut-offs (TCO's) are found in things like microwave ovens, where they are fastened to the housings of the magnetron and the chassis to monitor safe temperature conditions. Usually they are a NC switch that opens when the temperature of whatever they are...- techforce
- Post #2
- Forum: General Electronics Discussion
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Equivalent for 2SB557 & 2SD427 Complemetary Pair
2SB557 subs to an NTE281 or NTE285 while 2SD427 subs to an NTE280. I recently had a similar problem with some obsolete NEC original pre-amp transistors for a stereo repair, and discovered that NTE does supply matched pairs with the "MCP" suffix at the end of the NTE number. The ones you need are...
